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FEATURE ARTICLEOn the cover...

Extron & NSCA

COLUMNS4 Unique Techniques:

The MediaLink™ System and AM General

6 Marketing Matters:Making the Value Add Up

7 The Extron Hotline:Cable Price Reduction Adds Valuefor All

8 Technically Speaking...Answer: Hum, Buzz, and GroundLoops

16 Featured Product:Extron DVS 204

18 Rental & Staging Corner:What Makes the USP 405 Tick?

24 Tech Corner:Twisted Pair Wire and Skew

ALSO IN THIS ISSUE6 ExtroNews Survey Winner

13 New Products

20 Special VideoconferencingSeries

22 Cable Product Line Summary

26 New News

28 Tweeker Use

Issue 13.1 January – March 2002

Working Toward a Common Goal

continued on page 2

As A/V system integration becomes increasingly complex,

independent A/V consultants are called in more frequently to

make decisions and recommendations early on in projects with longer

life cycles. The design consultant can provide experience in a wide range

of disciplines including audiovisual, communications, information

systems, and acoustics—and fuse this knowledge to provide solutions

for corporate, academic, and institutional settings. Consequently, the

demand for experienced, informed consultants is growing.

Extron recognizes that the designconsultant is an integral part of the A/Vindustry and has created a number ofprograms specifically for theseindividuals. The Extron S3 Sales andTechnical Support Hotline, and dedicatedstaff of Sales and Engineering personneloffer consultants access to new productinformation, assistance with systemdesign, and answers to technicalquestions. The Extron Consultant-OnlyWeb site provides secure, 24-hour, online

access to detailed product information,pricing, technical articles, and the ExtronMatrix Builder program, as well asdownloadable application brochures, E-demos—Extron’s interactive productdemonstrations—and technical manuals.Extron also provides support throughongoing training at Extron Institute and

Show floorat the NSCAExpo.

TM

&

2 ExtroNews 13.1 January – March 2002

E x t r o n & N S C A ( c o n t . )

E X T R O N & N S C A

with educational seminars at major industrytradeshows. In fact, participation with industryassociations is one of the primary ways Extron keepsin contact with professional A/V consultants.

That’s why Extron is closely involved with theNational Systems Contractors Association (NSCA).The NSCA is a powerful advocate of those whowork within the commercial electronic systemsindustry, including consultants. The NSCA offers adiversified range of benefits to their membersincluding renowned technical and managerialeducation, certification preparation, industryadvocacy, valuable market statistics via the NSCAManufacturers’ Council, a Regional Council, and awealth of information on A/V systems. Additionally,because the consulting community is extremelyimportant to the success and growth of thisindustry, the NSCA has recently appointed aConsultant’s Council to further advance the issuesof importance to that community. Topics such asstandards and interoperability along withcredentialing and certification requirements will beamong the many topics that this newly appointedgroup will tackle.

Laying the FoundationExtron has a long-standing relationship with the

NSCA and shares their enthusiasm for furtheringthe education of industry professionals. As AndyMusci, NSCA Expo Chairman and President fromAltel Systems explains, “Technology changesalmost daily in our industry. For this reason, theNSCA Expo offers a wide range of education thatcovers many disciplines, such as video, audio,security, and others. Our education is known fordelivering only the highest quality content withsenior experts leading the discussion. And forgood reason—our planners work hard all year toput together classes that meet real needs.”

As part of this mutual commitment toeducation, Steve Somers, Extron’s Vice President ofEngineering, has been conducting VideoCalibration Seminars at the annual Expo since1998. Recently, Steve was appointed to chair theNSCA task force, which was organized to take theestablishment of an industry certification programunder consideration. This task force will reviewsimilar programs in other industries, create jobtitles and descriptions, and develop testingprocedures that will provide the framework forsuch a certification program.

“We are very pleased to have Steve working onthe NSCA Education Strategic Planning Task Force.We want all of our education to address real needsfor the professionals of our industry and wecouldn’t do that without Steve’s input,” saidChuck Wilson, NSCA Executive Director. “Hiswork with organizations in this industry is to becommended. Extron as a company sees thebenefits of a well-trained workforce, and weapplaud them for allowing Steve to spend so muchtime assisting us with our education program.”

NSCA Expo 2002As in previous years, Steve will be an active

participant at the 2002 NSCA Expo. This year’s Expotakes place on April 25-27th, and will feature morethan 500 exhibits and over 400 hours of industry-

Extron offers a number of educational courses and seminars at NSCA.

January – March 2002 ExtroNews 13.1 3

E X T R O N & N S C A

leading education. It is the only Expo to featureeverything that operates on a network, includingaudio, video, security, life safety, lighting control,telecommunications, and others. Thanks to thefloor-layout change introduced last year, attendeeswill see more working products this year than everbefore. This includes plans for 40 demo rooms thatallow attendees further hands-on inspection ofworking gear and direct interaction with productmanufacturers.

Three technology pavilions have been added to the2002 NSCA exhibit floor: a Tele/Data TechnologyShowcase, Stage and Lighting Technology Showcase,and an e-Buildings Technology Showcase. In addition,many new courses have been added to Expoeducation. Courses consist of beginning,intermediate, and advanced levels and are spread overnine different tracks, covering audio, connectivity,convergence, video, security, integrated systemsapplications, lighting control, business, and sales.

Extron CoursesExtron will be presenting a number of

educational courses at the 2002 NSCA Expo. “Noother company does more for the educationprogram at NSCA Expo than Extron. Extronseminars are something that our conferenceattendees always look forward to attending and have always received high marks on the evaluations,” said Chuck Wilson. This year’s topics include:

• Emerging Technologies in Display Interfacing• Mastering Computer/Video Interfacing• The Truth About Scan Converting• The Cable Seminar• Video Calibration: How to Make Better Pictures

In addition to the general NSCA seminars, Extron willalso be offering specialized Manufacturer Trainingwith courses in Small Systems Technologies andUnderstanding Digital Video Signal Distribution: DVI,USB, IEEE 1394, SDI, HDSDI. Complete coursedescriptions and registration information can befound on the NSCA Web site: http://www.nsca.org.

Booth #515The Extron booth will showcase a wide array of

new products including architectural products suchas the Extron Hideaway Surface Access series (HSAs)and new RGB 460 Floor Box interfaces, scalers,seamless switchers, and cables. Highlights willinclude new technologies such as IP control forremote monitoring and troubleshooting of matrixswitchers, and new Twisted Pair products that offercost-effective solutions utilizing CAT5, 5e, or 6 cables.

“Extron is proud to be exhibiting and teachingonce again at the NSCA Expo. We look forward toan ongoing relationship with the NSCA, and willcontinue to work together to provide value toconsultants, and to form strong relationships withinthe consultant community,” expressed Lee Dodson,Extron’s Vice President of Marketing.

The NSCA Systems Integration Expo™ is producedand managed by the NSCA, the leading non-profitrepresentative of the commercial electronic systemsindustry. For more information visitwww.nscaexpo.org on the web or call 800-446-6722 / 319-366-6722. Members of the NSCAreceive free admittance to the exhibit floor anddiscounted education.

The Extron tradeshow booth at the NSCA Expo.

Extron & NSCA


U N I Q U E T E C H N I Q U E S

At first, AM General executives wereprimarily interested in using a SMART Boardfor PowerPoint® presentations. They calledtheir local MCSI dealer in South Bend, andrequested a SMART Board demonstration.When the people from MCSI arrived, theysensed a need for a more integrated system.

“They thought the SMART Board was self-contained, and that it would do everything,”said Jim Hevel, Sales Consultant for MCSI. “Oncewe determined what they were hoping to dowith it, we recommended a fully integratedsystem along with the SMART Board.”

The first challenge facing the installation ofan integrated system was to develop a meansof system control that was simple enough foranyone to use without going to the expenseof a sophisticated touch panel control system.“We ended up recommending and installingthe Extron MediaLink System,” Hevel said.

MediaLink Control Hevel recognized that the most important

element of the system was simplicity. “We

AM General designs and manufactures the High Mobility Multipurpose Wheeled

Vehicle (HMMWV, pronounced “HUMVEE”) used by the military, as well as its consumer

counterpart, the HUMMER. As a world leader in tactical wheeled and special purpose vehicles with more than 50

years of experience, the folks at AM General recently expanded their executive conference room at the new H2 Plant

in South Bend, Indiana.

set forth to design the ‘perfect’ system fortheir needs,” he said. “The MediaLink gaveus the ability to control the system’s power,input selection, projector source control, andvolume—all from a convenient and centralizedcontrol device mounted on the wall.”

The control device Hevel is referring to is theExtron MLC 206 MediaLink Controller. Asimple and affordable device for one-projectorenvironments, the MLC 206 is an extendedremote control panel, ideal for AM General’sexecutive conference room. Executives withlittle or no training can walk in and operate the A/V system by simply pressing any one of the selection buttons.

The MLC 206 is mounted on an ExtronMLM-5GWP (see picture below) near the door

Above: The Extron MLC 206MediaLink Controller

Right: Executive conference roomat AM General

of the conference room. The MLM-5GWP isa five-gang wall plate with four single spaceArchitectural Adapter Plate (AAP) openings.The AAP openings are populated with two ofthe MediaLink’s numerous accessories, theExtron IRCM-VCR and IRCM-DVD, doublespace IR control modules.

The IRCM-VCR provides remote control ofa VCR’s basic features: rewind, play, forward,pause, and stop. The IRCM-DVD providesremote control of a DVD player’s mostcommonly used features: previous, play,next, pause, and stop. “These wereextremely easy to set up for control of thetwo players,” Hevel said.

Together with the MLC 206’s input sourcebuttons, the control modules enhance thesystem’s simplicity and meet the conferenceroom’s requirements.

In the CabinetA system rack is housed in a cabinet

located in a separate area behind theconference room. The rack holds a CPU, an S-video DVD player, a composite VCR, anElectro-Voice two-channel 7100 poweramplifier, and an Extron MLS 306 MediaLinkSwitcher, a low-cost, simple-to-use, sixinput, one output, multi-format activeswitcher. The MLS 306 is designed for single-projector environments and to complimentthe Extron MLC 206 Controller. It providesswitching for composite video, S-video, andcomputer-video. For audio switching, theMLS 306 offers pre-amp volume control aswell as bass and treble control.

The MediaLink™ System and AM General: Humming Right Along


U N I Q U E T E C H N I Q U E S

Hevel claims the MediaLink’s architecturaldesign and simplicity are what sold the AMGeneral staff on its installation. “They reallydidn’t want a lot of equipment visible in theroom,” he said. “The MLC 206 matches thecolor of the interior walls. It’s also an activedevice that effectively communicates withthe switcher and the projector. In that sense,it’s a rock-solid solution.”

Larry Day, an executive director for AMGeneral, share Hevel’s enthusiasm. “Thoseusing the system are senior managers andexecutives of this company,” he said. “Theirtime is very precious. This system is designedto allow them maximum benefit withminimum consumption of resources.”

As an add-on to the MLC 206, the MLS306 facilitates the low-cost systemintegration solution AM General was lookingfor. The VCR, DVD player, CPU, and a PCconnections coming from the conferenceroom table are all input into the MLS 306.The MLS 306 outputs to a local computermonitor, a sound system, and a Sharp VG-V10XU LCD projector. The projectorreceives commands via RS-232 control fromthe MLC 206. With the MediaLink System in place, the sources, projector, and even thepower are all centrally controlled andoperated.

“We used one of the available relays onthe MLC 206 to trigger the sequential powerunit,” said Tim Cichos, an associate engineerfor MCSI who configured the MediaLinkSystem for the conference room. “When thedisplay power button is pressed, it powers onthe whole system. We found the MediaLinksoftware and hardware very straightforwardand easy to use.”

Conference Table and DisplayAn Extron

P/2 DA2 MTd i s t r i b u t i o namplifier isc o n v e n i e n t l ymounted onto one of the large supportcolumns of the conference room table. AnExtron VGA cable with audio is run from theDA and connected to a customized pass-through device in the top of the table. Thisenables a handy connection point forlaptops. The P/2 DA2 MT is connected tomini high-resolution cabling encased inconduit that runs under the desk, throughthe wall, and into the cabinet for connectionto the MLS 306.

The P/2 DA2 MT is a one input, twooutput high-resolution VGA-UXGAdistribution amplifier with 300 MHz (-3dB)RGB video bandwidth. For meetings in theexecutive conference room, presenters caneasily plug in their laptops and share theirdata with attendees on the LCD projector.

The 400 square foot conference room hastwo display devices. A SMART Board is beingused for illustrating designs from a computer.The Sharp projector is mounted on theceiling and controlled through the MediaLinkSystem. It is used for projecting RGB, VGA,and video images on the motorized 8-footfront projection screen that hangs on theopposite wall.

System Operation“Overall, this is a pretty basic system,”

said Hevel. “I believe we accomplished theowner’s objective of an unobtrusiveinstallation. At the same time, we provided a respectable level of performance andflexibility.”

Extron MLS 306 MediaLink Switcher

100-240V 0.2A 50/60 Hz

R

Y/C

B

G

H

AUDIO OUT

INPUT 1

L

R

V

VID

INPUT 2

L

R

INPUT 3

INPUT 4

L

R

L

R

INPUT 5

L

R

INPUT 6

RGBHV

L

R

OUTPUTS

L

R

COMM LINK

A B C DE

RS232

CONTACT CLOSURE

Extron

MediaLink Controller

MLC 206 AAP

DISPLAY

POWER

VOLUME

MAX/

MIN

VCR

DVD

Laptop

BUFFERED

LOCAL MON ITOR

COMPUTER

INPUT

ID P IN11

ID P IN 4

P/2 DA2 MT

VCR CONTROL

REW

PLAYFWD

PAUSESTOPTx

DVD CONTROL

REW

PLAYNEXT

PAUSESTOPTx

Application diagramshowing theinstallation of theExtron MediaLinksystem.


Most companies strive to add value to their products and services

by making the best use of their available resources. While some

actions result in obvious customer benefits, much of what happens

behind the scenes makes little or no difference to the customer. For

example, a company initiative may enhance your productivity in terms

of efficiency and performance; however, even as the end result is

intended to impact the customer, the customer may not notice any

difference directly. Let’s take a closer look at how the value-add can add

up for both the company and the customer.

Making the Value Add Up

by Lee Dodson, Vice President of Marketing

M A R K E T I N G M A T T E R S

Quality for Whom?The challenge is to not only offer the best

product or service, but to create additionalvalue the customer can see and appreciate.Ultimately, the perceived value of yourcompany’s products and services isdetermined by the customer. What typicallydifferentiates successful organizations is thelengths they go to meet and exceed customerexpectations. Companies can gain customerloyalty by offering higher quality products andexceptional customer service. Sometimes, justlistening and responding to the customer’sneeds will result in a lifetime of patronage.

Most companies expend a tremendousamount of energy developing theinfrastructure to attract, support, andsustain satisfied customers. Unfortunately,the results of many of these efforts often gounnoticed by customers. This is becausethese activities do not add tangible value forthe customer. Many back office proceduresfall under this classification. That newliterature storage system, computer networkupgrade, or enterprise software suite for thewarehouse may facilitate internaloperations, but they hardly amount to muchin your customer’s eyes. You can come upwith a long list of good reasons to validatesuch activities, but if the customer doesn’tnotice a difference, you may have to go backand re-evaluate your priorities.

Value MethodOne popular approach for prioritizing

company initiatives is a process referred toas the value method. An effective valuemethod focuses efforts and resources onactivities that add value to what thecustomer will see, and minimizes those thatdo not. It can help direct limited resourcesto the area of highest return and enable asmall organization to do more with less—providing even more value to customersthan larger companies with greaterresources. To begin, you must make anhonest assessment of the areas you thinkyour customer will perceive as valuable.Then refocus your efforts on those areasthat will make a difference to yourcustomers. The objective is to concentrateall available resources into delivering valueto the customer while establishing apositive and solid reputation for yourcompany.

The value method is not the one and onlyanswer for every problem. However, it canhelp direct resources and promote anorganization’s image to capture acustomer’s attention. Many companies aretrying to optimize their efforts and minimizewaste. If your customers do not realizeincreased quality or value from a project, itmay be time to consider another projectthat does.

ExtroNews Annual

Survey Winner

Thanks to everyone who returnedan ExtroNews Annual Surveycard! The Annual Survey asked a series of questions about ournewsletter’s content and look. Thefeedback has been very helpful,and we will use this information toimprove future issues.

This year, the winner is...Guy DesrochesMCSI/Duocom Canada107 Colonnade RoadUnits 5 & 6Napean, ON K1G 4K1Canada

Guy Desroches will be receivingan Extron VTG 200 Video TestGenerator for his entry.

Congratulations!

interfacing, switching, distribution, signalenhancement, and cable products from asingle source, but also by enabling them toprovide their customers with the highestquality system possible—from source todisplay—while remaining within a budget.

This price reduction will not affect thequality or availability of our cables, nor doesit affect our warranty; these are the samehigh quality, high performance Extron cablesyou have grown to trust and rely upon.Although cable prices have been droppeddramatically, cable products will continue tobe in stock and our dealers will continue toreceive the same level of service and supportthat they have become accustomed to. Asalways, we stand behind all of our products100%. We've simply lowered prices toposition Extron cables as a viable solution forthe volume side of the market. Now, Extroncable is not only the ‘best in class’ withregard to quality—but also with regard to price.

Please contact your ExtronCustomer Support Representative toobtain details about the reduced cablepricing and to discuss the new annualquantity commitment levels fordiscounted pricing on bulk cable.


At Extron our goal is to provide our customers with the best Service,

Support, and Solutions possible. We strive to engineer and

manufacture our products to perform at the highest level of quality, and

include features that benefit both the end-user and the installer for

flexibility and ease of installation. We listen to our dealer’s comments and

suggestions, and make changes or additions to our product line when

possible to accommodate their needs. It has always been our goal to not

just meet but to exceed our customer’s expectations.

Cable Price Reduction Adds Value for All

T H E E X T R O N H O T L I N E

by Jeff Gibson, Vice President of Sales

Throughout the years, we have receivedoverwhelmingly positive feedback on thequality and performance of our cables fromdealers. Extron cables are known for theirdurability, ease of installation, and especiallyfor their ability to maintain signal integrityover long runs. However, there have beeninstances in which dealers have expresseddifficulty explaining to their customers theimportance of using a high quality cable. Theend-user must often be educated about thecritical role of cable in a system and howusing an Extron cable will enhance imagequality. There are even end-users whounderstand the benefit of high performancecable, yet substitute “sufficient” lower pricecables based solely on budget and costconsiderations. It is in these applicationswhere we saw an opportunity to add valuefor our customers by lowering prices on our cables.

Effective January 1, 2002, prices on morethan 75% of our cables were substantiallyreduced, including 250 of our most popularCable Assemblies and Bulk Cable.

By and large, we feel thisprice reduction will

help our dealers,not only byallowing them to

purchase all of their


Where Tomato Worms Come FromLike the insidious green worm that

mysteriously shows up on that luscioustomato, ground loops always seem to cropup in a system…moreover, metaphorically orotherwise, crawling slowly up that newvision, the fruit of our efforts, imparting thatsame feeling of dread. No one wants to dealwith ground loops or worms. But, are wereally dealing with a “ground loop”?Interestingly, many noise problems in systemsare not literally ground loops at all, althoughthis term has become part of the vernacular.There are three common methods of noisepickup: conduction, common impedance,and electric/magnetic field coupling.

Conduction is the most obvious and mostcommonly overlooked. In this situation awire may be running through anenvironment where noise is induced andconducted to another circuit. Either the wiremust be removed from the source of thenoise or appropriate decoupling methodsused to arrest the noise.

Common impedance coupling is probablythe most often encountered system ofinterference coupling. This occurs whenelectrical currents from two different circuitsflow through a common impedance. Eachcircuit creates a voltage drop across thecommon impedance thereby creating a noisesource which influences the other (seeFigure 1). This may be the most common

Answer: Hum, Buzz, and Ground Loops

T E C H N I C A L L Y S P E A K I N G . . .

by Steve Somers, Vice President of Engineering

Question: Name three things you have NOT experienced in your A/V

system installations. Yeah, right (don’t forget, my office is located

not far from Fantasyland). All three are common terms for disturbances

seen or heard in A/V systems everywhere. They are the visual or aural

result of “common-mode noise”. It could be described as common-

mode because it’s a common occurrence when we connect together the

components of a system. When common-mode noise presents itself we

usually refer to it as a “ground loop” problem regardless of the real

cause.

situation in A/V systems where equipment isconnected to AC power mains throughcommon, daisy-chained neutrals and safetyground returns to the main service panel.The first step in eliminating this source ofnoise is the use of “home run” style wiring,which establishes the single point groundshown in Figure 2. Do not allow systems toshare neutrals and grounds. All electricalsystems have a common impedance. Theidea is to connect electronic systems at asingle point in the system where thecommon impedance is the lowest possible.This point is usually at the main serviceentrance panel.

Radiated electric and magnetic fieldsprovide another source of interference. If thenoise source is close by, we need to considerthe electric field and the magnetic fieldseparately. If the source is far away (e.g., aradio station), the interference is consideredto be lumped into electromagnetic radiation.

Altogether, the coupling of interferingnoise involves a source, a coupling medium,and a receiver. Elimination or reduction ofinterfering noise is possible only byevaluating the problem and takingappropriate action on one or more of thesethree components. Although cabling qualityand installation is very important to noiseelimination, cables are not always the culpritbehind induced system noise. The interferingnoise we see or hear in the system will be

M E N U

SMSNSM

M E N U

SMSNSM

Figure 1. Equipment connected on a series AC circuit to asingle-point ground, but sharing ground current.

Figure 2. Preferred single-point ground method thateliminates shared current. Also called “home run” wiring.


converted to differential mode (mixed withthe desired signal) once it has entered thesystem component following its creation.And, in some cases, it is this piece ofequipment that is responsible for couplingthe noise. At this juncture, the noise isvirtually impossible to remove.

Becoming Well GroundedWhile grounding is the best way to

minimize or eliminate interfering noise, itis of little value if the grounding system isnot properly considered in the systemdesign. Knowing where and when toground components and cables is equallyimportant. Safety ground and signalground are the two categories ofgrounding. The connection of circuits tothe earth as a ground point implies asafety ground since our AC powerdistribution system is earth groundreferenced. To electronics engineers, theterm ground is simply a reference point ofzero potential difference between twopoints within a circuit or system. In anideal ground system, all points on theground have zero potential difference.However, in reality, anytime there is acurrent flowing through the ground returnof a circuit, a potential difference iscreated. This difference is the noisevoltage generator across the ground.Whether it will infect your system dependson whether this interfering current travelsthrough the system of interest.

The US standard power distributionsystem is a three-wire system: hot wire (115VAC), neutral wire, and safety ground wire(see Figure 3). The circuit current is intendedto flow from the hot wire, through the load,and through the neutral, not the safetyground. The safety ground is connected onlyto the appliance’s enclosure to protect theuser from electrocution in the event of aground fault. However, the neutral andsafety ground are common back at the mainentrance panel. This should be the point oflowest common impedance, or thetheoretical single point ground. This pointequates to the reference ground for thepower transformer in the main powersystem. Appliances wired for 230 VAC maynot use a neutral at all, but the enclosure istypically connected to the safety ground incase of dielectric failure. The reality is that,due to capacitive coupling, some currentsflow in the safety ground. This is often trueof switch-mode power supplies having linefilters that couple noise energy into thesafety ground. Although the noise is typicallyvery small, the potentially interfering voltageis there and may infect low voltage systemslike audio and video equipment.

Keep in mind that any equipment systemreferenced to another earth ground WILLinevitably create ground currents in yoursystem. Connecting signal equipment to aseparate ground rod from that used at theelectrical service entrance will set up


continued on next page

differences in potential between those twoground points. Therefore, two grounds arenot necessarily better than one.

Having the third wire safety ground is thebeginning of the so-called ground loopproblem. Initially, we may not know if theinterfering noise is a loop phenomenon orjust noise induced by virtue of a commonimpedance. We must analyze the actualreturn current path in the circuit, not thepath we think it should be flowing within. Insome cases, the wiring of a system dictates(usually economically) that ground returns bea combination of series and parallel singlepoint grounds. Certainly this is a compromiseso the designer must take care in groupingground returns selectively such thatequipment or circuits of widely varyingpower levels do not share the same groundreturn circuit. Some equipment is moresusceptible to noise problems by virtue of theinternal grounding topology taken by themanufacturer. The grounding premisesdiscussed here are just as meaningful withinthe design of equipment as they are at thesystem interconnect level.

Whether considering audio or video, thegrounding of cable shields is not always clear.There are two scenarios to consider—one forlow frequency noise and another for highfrequency noise. The hum and buzz in theaudio or creeping bar in the video typicallyfalls within the realm of low frequency noiseinterference. For balanced audio orfrequencies below 1 MHz, grounding thecable shield at only one point (the sourceend) is recommended. Grounding both endssets up a loop for current to flow along theground shield. This approach is effectiveagainst magnetic pickup, but may not helpwith low frequency ground loops caused bydifference in potential between the

Hot (Black)

Figure 3. US standard AC wiring showing safety ground and lowest common impedance point.



grounded shield at each end. If a shieldsurrounding a twisted pair must be groundedat both ends by virtue of the systemconnection design, then the scenario inFigure 4 should be followed.

Unbalanced coaxial lines such as typicallyused for video and consumer grade audioconnections should follow the groundconnection method shown in Figure 5 inorder to realize the best noise rejectionpossible. Figure 6 shows the typical wiringscenario for a ground loop condition. Whenadditional noise rejection is required,consider breaking the signal ground utilizinga coupling transformer, an optical coupler, adifferential amplifier, or a common-modechoke. All four of these possible solutionsmay work well for audio situations becauseof the limited signal bandwidth. Figure 7shows how an isolation transformer breaksthe ground loop for an audio installation.

For video, the transformer and opticalcoupler are difficult to implement because oftheir impact on system high frequencyperformance. This leaves the differentialamplifier or the common-mode choke asviable solutions. Eliminating the effects ofthe circulating current created by thedifferential voltage between two equipmentgrounds is our goal. Let’s take thetransformer concept, modify it somewhat,and implement as a common-mode choke asin Figure 8. A common-mode choke passesDC and differential-mode signals, but blockscommon-mode signals. A common-modesignal manifests when the voltage amplitudeand direction are the same on bothconductors within the connection system.The desired signal’s current flows in oppositedirections within the common-mode chokeand is passed on through by its lowimpedance. In the case of common-modecurrent, flow is in the same direction and thechoke presents a high impedance. Theinterfering noise magnetic field is absorbed,or dissipated within the common-modechoke. Electrically, it is as if the ground linewere opened. When the interferingfrequency is several megahertz, the

Ground Loop

M E N U

SMSNSM

M E N U

SMSNSM

Figure 4. Best connection method for audio on shielded twisted pair when outershield must be grounded at both ends.

Figure 5. Best connection method for unbalanced coaxial lines.

Figure 6. Equivalent circuit for a ground loop between two components not onequal potential grounds.

Figure 7. An isolation transformer is a quick, cost effective method for removinga ground loop in an audio system.

Figure 8. Common-mode choke arrangement is very effective in blocking common-noisebut passes DC bias and wide band frequencies.



common-mode choke’s effectiveness may belimited by internal shunt capacitancebetween windings on the choke core thatallow the interfering signal to pass through.This limitation is highly dependent on thequality of the common-mode choke design.

The differential amplifier style isolation fora ground loop condition (as used in theExtron GLI 350) is still an effective method forisolating the interfering ground current. Likethe balanced input on a professional audioamplifier, the differential style isolator cancelsthe common-mode voltages on the signalline. This type of isolation amplifier is veryeffective at high frequencies. It can be limitedat low frequencies depending on the qualityof the internal balance of the amplifier’sinputs and its dynamic voltage range.

In contrast, common-mode chokes (as usedin the Extron GLI 1000 Series) can typicallyhandle higher common-mode voltage levelsand are better balanced at low frequencies.Therefore, the selection between common-mode choke or differential amplifier noiseelimination solutions is based more on thefrequency band of the interfering signal. Forthe typical low frequency hum, buzz, androlling bars, the common-mode choke oftoday will likely provide the best performance.Recent developments in extremely highpermeable materials make the common-mode choke concept a better performer forvideo applications compared to a few yearsago. In addition, its simplicity is enhanced inthat no power supply is required for itsoperation. The correct point of application isin series with the signal line(s) at the input ofthe noise-receiving device in your system. Forvideo applications, this will be at the display’sinput. Care must be taken that the shields ofthe input side cables on the common-modechoke do not contact the chassis or any othermetallic connection that is connected to thedisplay’s ground; otherwise its positive effectswill be defeated.

Think In Small LoopsMaximization of radio and TV signal

reception is best done by installing the

largest antenna you can afford. Conversely,the best way to protect against magneticnoise pickup is to reduce the area of thereceiver pickup loop, the antenna, as muchas possible. The term “receiver” in thiscontext is any device acting as the receptorto undesirable signals. The loop area towhich I refer is the total area enclosed by thecirculating current in the receiving circuit.This is where determination of the interferingcurrent’s actual return path is very important.

A shield around a wire affords someprotection against magnetic induction whenthe shield reduces the area of pickup. Figure 9shows the affect of the shield on the looparea. Quite often signal currents return to thesource by means other than that which was

intended. Only when we know the actualpath of the return current can we predict theshielding effectiveness of a system. To obtainthe maximum protection from interferinglow frequency noise the shield should not beone of the signal carrying conductors; ifpossible, one end of the circuit system shouldbe isolated from ground. In most cases, dueto our three wire electrical system, this isdifficult to attain without considering use ofa transformer (audio) or a common-modechoke (video).

Coax: Why it Works, Why it Doesn’tWrapping a shield around a conductor

and grounding at one end creates a shunt forthe electric field around the conductor.However, the magnetic field around theconductor created by current flow in theconductor is unimpeded…meaning that theconductor can radiate a magnetic field. Bygrounding the coax shield at both ends, acurrent is induced in the shield by themagnetic field. This shield current flows inthe opposite direction to the field createdaround the center conductor. Therefore,magnetic shielding is afforded bycancellation of the magnetic field currents.At frequencies around 1 MHz and above, theskin effect comes into play. Magnetic fieldscreated by the signal inside the coaxial cableare cancelled internally wherein the fieldcurrent travels on the interior of the shieldonly. External interfering fields createcurrents traveling on the outside of the coaxshield only. So, at high frequencies, coaxialcable performs more like a double-shieldedcable.

In the close-coupled presence of lowfrequencies (i.e., 60 Hz power line) theeffectiveness of a shield around a conductor(as in a coaxial cable) is nil. This is why all lowvoltage signal cables should not be runparallel near AC power lines. More noise

M E N U

SMSNSM

M E N U

SMSNSM

M E N U

SMSNSM

continued on next pageFigure 9. Illustration B shows how a shieldedcable can decrease the magnetic area of theloop when both ends are properly grounded.



coupling rejection is attained by physicalseparation of the low voltage signal cablesfrom the power lines since the inducedenergy falls off at a rate proportional to thesquare of the distance of separation.

Relative to capacitive pickup, a double-shielded coaxial cable (triax) havinginsulation between the two shields ensuresthat the signal-carrying shield does not havenoise potentials induced within it. The outershield carries ground currents and shuntsthem away. While noise rejection isenhanced with triaxial cable, it is moreexpensive and difficult to use or terminate.

Twisted Pair: Is it Any Better?Shielded Twisted Pair (STP) wire has

characteristics very similar to triaxial cable forcapacitive pickup and magnetic pickuprejection. It is certainly easier to work with aswitnessed by its prolific use in professionalaudio cabling systems. This type of cableprovides excellent resistance to magnetic andelectric field coupling at low frequencies. Thedesired signal currents flow in the twotwisted conductors and any noise currentsflow within the shield. Therefore, thecommon impedance type coupling iseliminated in this system [Note: It is possibleto experience noise pickup on balance inputsusing STP if the downstream component’sdifferential input has improper internalgrounding with respect to the cable shieldconnection. This is referred to by some as the“pin 1 problem”]. Unshielded Twisted Pair(UTP) wire has very little capacitive pickuprejection capability unless its termination isvery well balanced. Its rejection of magneticpickup is excellent, however, that is becausemagnetic field currents travel within it inopposite directions and cancel.

But, realize that twisted pair cablesperform best at frequencies below about100 kHz with satisfactory performancepossibly extending to several megahertz. Inthe megahertz range, high frequency lossesin the cable increase rapidly, aided by non-uniformity characteristics of the cable

construction. This explains, in part, theproliferation of coaxial cable from lowmegahertz frequencies on up through VHF.

Are You Magnetic or Electric?Troubleshooting system noise problems is

challenging. Determining whether undesiredsignals result from capacitive pickup (electricfield) or magnetic pickup can aid thetroubleshooter toward a fast resolution ofthe problem. For identifying the point ofnoise ingress, Reference 3 at the end of thisarticle provides an excellent step-by-stepapproach utilizing simple fixtures andtechniques. In addition, there is somethingyou can do using a digital multi-meter oroscilloscope for low frequency interference.

Measure the noise voltage across theterminating impedance at one end of thecable while decreasing the impedance at theother end of the cable (i.e., loading it downwith a parallel resistance). If the measurednoise decreases, the pickup is from anelectric field. This is because, for an electricfield, a noise current is induced between thereceiving conductor and ground. Loweringthe impedance at the opposite end loadsdown this interfering current. But, if themeasured noise increases, the pickup is dueto a magnetic field. For magnetic fieldcoupling, a noise voltage is produced inseries with the receiver’s conductor. Loadingdown the opposite end of the conductorlowers the impedance of the series loop andthe magnetic induction is enhanced.

Strive for the Uncommon ModeHum, buzz, and ground loops should not

engulf the bulk of your system integrationtime. First, consider the equivalent circuit ofyour system by identifying all possible routesfor interfering ground currents. Remember,defeating the AC power third-wire groundconnection in any system may solve a groundloop problem, but not only is this illegal, itcould result in the electrocution of yourcustomer. While there is no substitute forgood design practice where groundingsystems are concerned, both differential

amplifier and common-mode chokesolutions are worthwhile. In light of newcommon-mode choke technology you willwant to consider what this tool canaccomplish for you in troublesome noisesituations with its simplicity ofimplementation. These new chokes caneasily pick off that green worm, known ascommon-mode noise.

R

1) Noise Reduction Techniques in ElectronicSystems, Second Edition, Henry W. Ott, 1988,John Wiley & Sons, ISBN 0-471-85068-3

2) Grounding of Industrial and CommercialPower Systems, IEEE Green Book, 1996, TheInstitute of Electrical and Electronics Engineers,ISBN 1-55937-141-2

3) Audio Hardware Applications, Ted Uzzle,Larry Garter, Gene Patronis, March 2001, NationalSystems Contractors Association

REFERENCES:

GLI 1000 5BNC

GLI 10002BNC

GLI 1000 15HD

GLI 10002RCA

Extron GLI 350

Extron GLI 1000 Series

Differential:

Common Mode Choke:


Australia Central Europe IEC UK

International Power Connectors:

Hideaway Surface Access

(HSA) EnclosuresNew Features

HSA 400

HSA 800

Hideaway Series

Please call Extron for part numbers andpricing.

URLwww.extron.com/hideaway

Extron has introduced a new network-data connection configuration on theHideaway Surface Access (HSA) family ofproducts. Previous RJ-45 (CAT 5) and

RJ-11 network and dataconnections have been changed

to two bezel-mounted CAT 6-rated RJ-45 connectors. This new configurationoffers more options on how theseconnections can be utilized. When an RJ-11phone connection is needed, an RJ-45 portcan be used to allow a pass-through for atelephone or modem signal connection.Interchangeable icon labels for phone,monitor, and CAT 6, as well as blankfaceplates to cover unused connectionpoints, will also be included with the HSAproducts.

In addition to the already extensive line ofHSA products, Extron now offers models with International power connectors. These

include models for the UK, Australia, Central Europe, and a universal female IECversion. HSA products are architecturalsolutions for inconspicuous computer-videointerface and A/V system connections. Theyare designed for easy, elegant, flush-mountinstallation into virtually any table surface,remaining out of sight until interface andpower connectors are needed. Customconnectivity options make the HSA suitablefor numerous applications, such asboardrooms with multiple users who needaccess to A/V connectors.

N E W P R O D U C T S F R O M E X T R O N

The Extron SuperFlex BNC-6 RC FlatCable is a rugged, flexible cable ideal forrental and staging applications that requirecabling with a low profile. This cable lies flatunder carpet and in other areas thatexperience a substantial amount of foottraffic. The large diameter of the conductorsincreases performance and pull strength, andreduces the likelihood of cable damage andloss of connectors. The BNC-6 RC Flat Cableis comprised of six color-coded coaxconductors with 75 ohm BNC connectors forRGBHV signal. The sixth conductor can beused to distribute composite video or as aspare. The SuperFlex jacket material provides

BNC-6 RC FlatCable

BNC-6 RC Flat Cable

Part Number: List Price:22-140-02 $2,575.00*(bulk, 500' spool)

URLwww.extron.com/bnc6rcflatbc

* Prices listed in US Dollars, valid for US sales only.

superior flexibility, while an extraordinarilysmooth surface makes the cable easy to pull,coil, and route through tight spots. The BNC-6 RC Flat Cable is offered in 3' to 300'cable assemblies and in 500' bulk cablespools.

More New Products continued on next page.

The new model of the MediaLinkSwitcher MLS 506 MA (100v) is for usewith 100v audio systems commonly foundin Europe and Asia.



The Extron MediaLink family of easy-to-use, simple solution products continues togrow with the introduction of newaccessories and models. There are threecontrol modules that can be added for usewith the MediaLink Controller: the IRCM-Tape, ACM-Tone, and the ACM-Level.

• The IRCM-Tape is a double space, IRControl Module Architectural Adapter Plate(AAP) for use with the MLC 206. Onceconfigured, it provides IR control for thebasic operation of a tape deck.

• The ACM-Tone is a double space,Audio Control Module AAP that providesthe ability to adjust bass and treble levelswhen used with any MediaLink switcher.

• The ACM-Level is a double space,Audio Control Module AAP that providesthe ability to adjust input and mix levelswhen used with the MLS 506MA and MLS 506SA.

All three control modules are available ingray, black, and white.

The new MediaLink Controllers and a100 volt MediaLink Switcher provide evenmore options for signal configuration. TheMLC 206 AAP is a five-gang wall plate thatincludes four single space ArchitecturalAdapter Plate (AAP) openings. The AAPopenings allow for the integration withmany Extron Architectural Adapter Plates.

EC versions of the MLC 206 and MLC 206 AAP combine the standardproduct features with the ability to bemounted in a Euro-channel.

MediaLink™Accessories and Models

MediaLink Accessories & Models

IRCM-TapePart Number: List Price:70-180-01 (gray) $215.00*70-180-02 (black) $225.00*70-180-03 (white) $225.00*

ACM-TonePart Number: List Price:70-181-01 (gray) $215.00*70-181-02 (black) $225.00*70-181-03 (white) $225.00*

ACM-LevelPart Number: List Price:70-182-01 (gray) $215.00*70-182-02 (black) $225.00*70-182-03 (white) $225.00*

URLwww.extron.com/mlaccessories

MLC 206 AAPPart Number: List Price:60-460-01 (gray) $1,195.00*60-460-02 (black) $1.205.00*60-460-03 (white) $1,205.00*

MLC 206 ECPart Number: List Price:60-385-10 (white) $1,130.00*

MLC 206 AAP ECPart Number: List Price:60-460-10 (white) $1,230.00*

URLwww.extron.com/mlc206

MLS 506MA (100v)Part Number: List Price:60-386-13 $2,695.00*

URLwww.extron.com/mls506ma


IRCM-Tape

ACM-Tone

ACM-Level

MLC 206 EC

MLC 206 AAP EC

MLS 506MA (100v)

MLC 206 AAP

The Extron RGB 460xi MK is a customizedtwo-gang computer-video interface that canbe mounted in MK wall boxes with aminimum depth of 47 mm used in the UK,Singapore, and Australia. The RGB 460xi MKis available with black, white, or unfinishedfaceplates.

RGB 460xi MK Interface

Part Number: List Price:60-467-01 $740.00*(black & white)

60-467-51 $740.00*(unfinished)

URLURL: www.extron.com/rgb460ximk


RGB 460xi MK



Extron RGB 460xi Series Floor BoxInterfaces are architectural interfaces thatcan be mounted in Steel City® AFM-2,AFM-4, AFM-6, and AFM-8 floor boxes. Alow profile design provides ample space forcables and connectors within the floor box.Each mounting plate is engineered to fit easily into the floor box, makinginstallations quick and clean.

The Extron RGB 460xi SC-AFM 2 andRGB 460xi SC-AFM 4 are computer-videointerfaces, each with a female 15-pin HDinput and a buffered local monitor outputthat can be mounted in AFM-2 or AFM-4floor boxes, respectively. The Extron RGB464xi SC-AFM 6 is a computer-videointerface with a female 15-pin HD input anda buffered local monitor output with activeaudio as well as S-video, RCA to BNC, andRJ-45 pass-through connections. The ExtronRGB 468xi SC-AFM 6 is a computer-videointerface with a female 15-pin HD input anda buffered local monitor output as well as Architectural Adapter Plate (AAP) openings for optional AAPs. Both the RGB 464xi SC-AFM 6 and RGB 468xi SC-AFM 6 can be mounted inAFM-6 floor boxes.

The Extron SC-AFM 8 is a mounting kitfor AFM-8 floor boxes. It can accommodate

RGB 460xi SeriesFloor Box Interfaces

Extron RGB 460xi Series Floor BoxInterfaces & Mounting Options:

RGB 460xi SC-AFM 2 Part Number: List Price:60-463-01 $740.00*




SC-AFM 8 Mounting Kit Part Number: List Price:70-203-01 $165.00*

URLwww.extron.com/rgb460xifloorbox


RGB 460xi SC-AFM 2 Floor

Box Interface

RGB 460xi SC-AFM 4 Floor

Box Interface

RGB 468xi SC-AFM 6Floor Box Interface

SC-AFM 8Mounting Kit

any Extron four-gang, Extron three-gang, orone or two Extron two-gang faceplate. Withsuch flexibility, the SC-AFM 8 can supportsuch products as Extron RGB 460xi, RGB 464xi, or RGB 468xi interfaces, theExtron TP T 460, and assorted Extron AAPs.

All floor box interfaces are available ingray. For more information on Steel City®floor boxes, manufactured by Thomas andBetts, see www.tnb.com.

The Extron TP R 15HD A Twisted PairVideo Receiver accepts computer RGBHVand component, S-video, or compositevideo transmissions with stereo audio onCategory 5, 5e, or 6 shielded twisted pair(STP) or unshielded twisted pair (UTP) cableoriginating from an Extron Twisted PairTransmitter. Extron Twisted Pair transmittersand receivers allow A/V professionals totake advantage of small, flexible, and lowcost twisted pair cable. The video and audiosignals are input via a single RJ-45 femaleconnector and output on a single, 15-pinHD female connector. The two-channelaudio signal is output (balanced orunbalanced) on a 3.5 mm, 5-pole captive

TP R 15HD ATwisted Pair

Video Receiver

TP R 15HD A Twisted Pair Video Receiver

Part Number: List Price:60-450-01 $475.00*

URLwww.extron.com/tpr15hda


screw connector. With an optional mountingkit, the TP R 15HD can be discreetly mountedunder a desk or adjacent to a projector. TheTP R 15 HD A is designed for transmissiondistances from 6 to 300 feet and will notsupply power to an Extron twisted pairtransmitter.

(Shown with 2 Extron TP T 460 andRGB 460xi)


Extron DVS 204Multi Format Digital Video Scaling

The Extron DVS 204 Digital Video Scaler incorporates next generation

proprietary scaling technology with input flexibility that’s essential

for today’s top-notch audio/visual applications. With a host of advanced

features, the DVS 204 is an affordable scaling solution that provides

superior image enhancement.

Scenario: Setting up an A/V system for aboardroom can involve multiple videosources and displays with multiple videoformats including composite video, S-video,HDTV/component video, RGB, and SerialDigital Interface (SDI). In a high-endboardroom system with numerous videosources, quality and convenience arepriorities. If the display is a 60-inch HDTVPlasma, it is important that all videosources—from a DVD player to a VCR andeverything in between—be properlyupscaled to attain a clear, bright, and high-resolution image.

Solution: The Extron DVS 204 Digital VideoScaler is a perfect, affordable solution fortoday’s boardrooms. With 33 available outputrates, including HDTV, the DVS 204 can be aneffective solution for creating a high qualityimage. In addition to the 60-inch plasma,there may be a variety of displays rangingfrom high definition rear projectors to 42-inchflat plasma screens. If you intend to enhancethe image on any of the displays, the DVS204 can upscale the picture to match justabout any display’s native resolution.

FlexibilityThe DVS 204 consists of two models:

DVS 204 and DVS 204 D. Each modelsupports the following video formats on oneof four inputs: an RGB input as a pass-through to simplify system design,component video, S-video, and compositevideo. The 'D' (digital) version also supports aSerial Digital Interface (SDI) input. For allmodels, RGB or component video is outputon both one female 15-pin HD connectorand six female BNCs.

Input one of both DVS 204 modelsaccepts composite video on one female BNC;input two can be configured for composite,S-video, or component on three femaleBNCs, or component on three female BNCs;input three accepts S-video on a 4-pin mini-DIN; and input four is an RGB pass-throughsignal on a female 15-pin HD connector.Input four can also be configured to a SCARTconnector for scaling RGBcvS, a formatcommonly associated with many EuropeanDVD players.

Any one of the inputs can be configuredas the SDI input when the optional SDI cardis installed (DVS 204D). One advantage tousing an SDI input is that incoming SDIsignals will bypass the analog-to-digitalconversion process. This can produce a muchcleaner picture.

By offering such an ample amount offlexibility, the DVS 204 is a valuable asset toany boardroom system with sources ofvarious formats. A composite VCR,component DVD player, and laptopcomputer can all be connected and scaled up

F E A T U R E D P R O D U C T

Extron DVS 204D Digital Video Scaler

DVS 204 Key Features:

Four inputs, six outputs

33 different scaled outputrates, including HDTV

Extron scaling technologies:True Rate™, Dynamic MotionInterpolation (DMI™), andAccu-RATE Frame Lock(AFL™)

Aspect ratio conversioncapabilities

RS-232 and IR controloptions

Cost-effective, scalingsolution


solves frame rate conversion issuesexperienced by video scalers. When videoinput and output refresh rates differ, thereare certain points in time when the two ratescross over each other. The result is a glitch orthe image freezes on the display. AFL solvesthis problem by locking the output framerate to the input frame rate.

Aspect RatioA key feature of the DVS 204 is the

aspect ratio control used to accommodatedifferent formats. The explosive growth ofthe DVD, along with the advent of thewidescreen HDTV, has spurred the need tomanipulate aspect ratios. The DVS 204 canhorizontally and vertically resize anyincoming video to any aspect ratio. Thisenables it to accommodate different movieformats to complement either a standard 4:3or a widescreen 16:9 aspect ratio.

Often, after the image has been scaledand resized, the image appears distorted andcompressed because the correct aspect ratiohas been lost. By using the aspect ratio control on the DVS 204, the correct aspect ratio can be restored. Once this isaccomplished, the geometry of the picturelooks normal.

In addition to the aspect ratio controlfeature is memory recall which allows threesizing presets to be saved per input. Thisenables you to automatically recall thesettings for any DVD or other video sourcethat previously required an aspect ratioadjustment.

to match the resolution of your displaydevice.

Scaling TechnologiesTo achieve superior scaling performance,

the DVS 204 employs several of Extron’slatest proprietary technologies. DynamicMotion Interpolation (DMI™) is anadvanced motion detection andcompensation method. Motion artifacts,such as jaggies, can distort an image whenvideo is de-interlaced. The DMI processdelivers the best aspects of still and motionalgorithms, and introduces a new level ofimage enhancement capability without lossof image fidelity. With DMI, the DVS 204 isable to provide superior image quality.

To help maximize image detail andsharpness for NTSC or PAL sources thatoriginate from film, 3:2 and 2:2 pulldowndetection is also found on the DVS 204. 3:2 pulldown detection for NTSC and 2:2 filmdetection for PAL are advanced film modeprocessing techniques that help maximizeimage detail and sharpness for NTSC or PALsources that originated from film. The DVS 204 uses pulldown and film detection tomatch film to video frame rates for smootherand more properly aligned film-to-videoconversions. In the case of 3:2 pulldowndetection for NTSC, it surpasses other de-interlacing techniques in optimizing imagequality without introducing motion artifacts.

True Rate™ recovers the natural motiondynamics of material that originated fromfilm while Accu-RATE Frame Lock™ (AFL)

F E A T U R E D P R O D U C T

Additional FeaturesHoused in a rack mountable, 1U high, half

rack wide metal enclosure, the DVS 204 canbe controlled via the front panel, with RS-232 control, or remotely through anoptional IR 901 remote. The front panelbuttons control video input selection andpicture adjustments. These samefunctions are availablethrough RS-232 usingExtron’s user-friendly SimpleInstructionSet (SIS™).

The DVS 204 features variable top andbottom vertical blanking adjustments.During scaling, captioning and tapeheadswitching in the video’s blanking area showup as picture noise. Using variable blanking,a user can add black lines at the top andbottom of the screen to eliminate edgenoise. The DVS 204 also includes quadstandard decoding. Utilizing a digital, four-line adaptive comb filter, the DVS 204can decode NTSC 3.58, NTSC 4.43, PAL,and SECAM composite video intocomponent or RGB video with minimalchroma noise.

The DVS 204 can make all the differencewhen it comes to the quality of the image,especially when you’re working withmultiple sources and multiple high-resolution displays. This applies to high-endboardroom systems, as well as to otherintricate applications including conferencerooms and auditoriums.

Without DMI technology. With DMI technology.

IR 901Remote


The Extron USP 405 offers a number ofdistinct advantages. With five video inputs, itprovides RGB input flexibility with a 15-pinHD computer-video input and loop-through,plus BNCs for system integration. From anoperational perspective, the USP 405 is veryuser-friendly, providing direct access topicture controls for quick and efficient set-upof the image. Its backlit, easy-to-read,buttons, and LCD menu make it a cinch tofreeze the image, switch inputs, or makepicture adjustments—even in low-lightenvironments. Additionally, the USP 405’ssolid and durable design makes it a reliableand sturdy device for rental and stagingenvironments.

When it comes to signal processing, theUSP 405 is extremely versatile and offers highquality signal processing. High-resolutionsignals can be converted down to low-resolution NTSC or PAL video signals, or, low-resolution signals can be scaled up toone of 33 output resolutions. Add these toconversion and switching features, and theUSP 405 is a complete solution. The system ismore tightly integrated and centralized, andthe need for separate components iseliminated, thereby streamlining operationsand cutting excessive A/V expenses.

To fully appreciate the extent of the USP405’s reach, here is a detailed overview of itscapabilities.

Scan ConverterThe USP 405 can take high-resolution RGB

computer-video down to low-resolutionNTSC or PAL, whether your requirements arecomponent, S-video, composite, or SDIsignals—all while maintaining the highestpossible image quality. In rental and stagingenvironments, scan converters are widelyused in presentations where speakers areinteracting with computer-generatedgraphics that will later be edited onto videotapes, broadcast through videoconferencing,and/or satellite feeds.

What Makes the USP 405 Tick?

T he Extron USP 405 is a powerful, all-in-one Universal Signal Processor with a seemingly infinite number

of application possibilities. Its versatility makes it an indispensable device in rental and staging

environments, as well as boardrooms, conference rooms, classrooms, and auditoriums. This one-box solution

is a high-performance scaler, scan converter, standards converter, switcher, and transcoder. It also offers aspect

ratio conversion, zooming, and test pattern capabilities.

TranscoderThe USP 405 can take one video format

and transcode it into another video format.In one instance, you may have an analogcomposite signal and want to convert it to adigital component signal. The process isinterchangeable between all analog videoformats, including the conversion of analogto digital (SDI) or digital (SDI) to analog. The USP 405’s transcoding abilities would,

USP 405UNIVERSAL SIGNAL PROCESSOR

ADJUST

MENU

NEXT

PICTURE ADJUSTMENTS

COL/TNT BRT/CONT DETAIL SIZE CENTER ZOOM

INPUTS

RGBFREEZE UNIVERSAL COMPOSITE S-VIDEO SDI

USP 405UNIVERSAL SIGNAL PROCESSOR

ADJUST

MENU

NEXT

PICTURE ADJUSTMENTS

COL/TNT BRT/CONT DETAIL SIZE CENTER ZOOM

INPUTS

RGBFREEZE UNIVERSAL COMPOSITE S-VIDEO SDI

Extron USP 405 Universal Signal Processor

R E N T A L & S T A G I N G C O R N E R


for example, be extremely useful in a non-linear editing suite where a variety of sourcesignals from analog composite to RGB needto be introduced into the digital programmaterial. The transcoding feature of the USP405 can accomplish this.

ScalerAs a scaler, the USP 405 is able to accept

low-resolution signals, such as NTSC, PALand SECAM video signals, and scale them upto high-resolution RGB video for viewing ondisplay devices. By allowing the USP 405 toconvert various signal types into a standardRGB cabling configuration, the need foradditional cabling is eliminated and RS-232control is simplified. The scaler can alsomatch the output rate of the digital display’sinternal pixel map processor, allowing for aproperly-sized, sharper image.

Standards ConverterAs a standards converter, the USP 405

uses a quad standard decoder to convertNTSC 3.58, NTSC 4.43, PAL, or SECAM toNTSC 3.58 or PAL. In one scenario, apresenter in the United States may purchasea multi-standard VCR for playing videos inNTSC, PAL, and SECAM; however, he will notbe able to display the videos unless he alsohas a multi-standard television set ormonitor. A video tape of any standard playedon a multi-standard VCR can be connected

to a USP 405 for conversion and guaranteesviewing on a PAL or NTSC display device. TheUSP 405 bridges the gap between theworld’s many video standards.

SwitcherIn small, one-projector environments, the

USP 405 can also be used as a five inputswitcher. Since all signals are converted up ordown into one format by the USP 405,switching is simplified. To facilitate the process,the USP 405 employs Extron’s Triple-ActionSwitching™ technique. Triple-Action Switchingis a three-step RGB video switching sequencethat minimizes picture scrambling and glitchesby removing video before switching syncsignals. This allows the display device a briefperiod to lock onto a different sync timing. Thevideo signal is then reapplied after the displayhas locked. This feature smoothes switchingtransitions and gives the overall result aprofessional look and appearance.

Zooming and PanningThe USP 405 can zoom an image up to

200% and allow panning across the screen.The image can be zoomed in and out up to200% while keeping the image in its originalaspect ratio. With its zooming capabilities, asingle video signal can be run through fourUSP 405s and divided into quadrants tocreate a professional video wall effect acrossfour display devices.

Aspect Ratio ConversionThe USP 405’s scaling capabilities are able

to convert a video’s aspect ratio to suitpractically any display format. In addition tomeeting the TV standard of 4:3, the USP 405can resize the image to fit plasma orwidescreen formats of 16:9. The built-inscaler in the USP 405 is able to horizontallyand vertically resize the video image tomatch a specified aspect ratio, filling thedisplay and improving the overall perceptionof the displayed image.

Test PatternsThe USP 405 has ten test patterns

including a crop pattern, crosshatch, 16 bargrayscale, color bars, alternating on/offpixels, ramp, 4 x 4 cross hatch for use withvideo walls, and three aspect ratio patternsfor setting up letter-box DVDs. Test patternsaid in preliminary picture set-up, helping tomaximize the potential of the image whileminimizing image artifacts and other noisethat occurs during signal processing.

All-in-One and One for AllThe USP 405 is a universal signal

processor, engineered to overcomeconversion issues that invariably pop upwhen you least expect them. In rental andstaging environments where time is at apremium, the USP 405’s ubiquitous naturemakes it a welcomed and versatile solution.

To learn more about the Extron USP 405Universal Signal Processor, go to the ExtronWeb site at: www.extron.com/usp405.

R E N T A L & S T A G I N G C O R N E R


Solution: You may want to disconnect and try againbecause in most instances, the channels will beredirected via a different route. Another option is to tryto force the call for each channel to transmit at 56 kbps. You may find a connection of 336 kbps isconfirmed; hence, your videoconference can getunderway. Although you will be running 336 kbps, thequality is comparable to that of 384 kbps.

Scenario 3: A call dialed through a PBX (PrivateBranch Exchange) system is unable to connect. Thelong distance carrier is contacted to helptroubleshoot, and although the call is domestic,the phone company is reading it as aninternational call.

Solution: Although the odds of this happening arequite slim, it is not unheard of. In this configuration,when dialing ‘9’ to get an outside line, ‘1’ for longdistance, and ‘732’ for the area code, the number isrecognized as an international call. To resolve thisquandary, the PBX programmer has to dupe the systeminto dropping the ‘9’ and letting it dial the 1-7-3-2 prefix. The domestic call can now be made.

Scenario 4: The near end cannot be connected tothe far end, yet the two sites have been connected inthe past.

Solution: There may be some impedance or technicalissues transgressing at that particular day and time. Tryto bypass your long distance carrier by dialing directwith PIC CODES:

• AT&T 1010-288• MCI 1010-222• SPRINT 1010-333

Sample dialing: 1010-333-1-714-254-0242

Of all of the topics that have been covered in thisseries, the most queried and discussed subject wassaved for last—Troubleshooting. As you are more thanwell aware, a videoconferencing system may bedesigned in countless ways. Variations in systemconfigurations can, and do create tremendouschallenges with regards to the actual implementationand operation of the videoconferencing system. Byresearching these troubled areas, I have expanded mycreative thinking for problem solving. I would now liketo share some of these scenarios with you in hopesthat if and when you come across a puzzling situation,you can refer to this article to diagnose your situationand ascertain a solution.

Scenario 1: The near end cannot call into the 700area code far end.

Solution: In order to call into a custom 700 areacode, the near end must have its ISDN (IntegratedServices Digital Network) lines registered with theprovider’s 700 area code network. The near end shouldhave the ISDN phone numbers for each channel andcall the provider with this information. If dealing withAT&T, the number is 800.222.7956. Once registered,the near end should be able to call any 700 area code.

Scenario 2: A 384 kbps call is made, but not all ofthe channels are able to connect. It is known thatboth the near and the far ends have three ISDNlines, or six channels running 64 kbps per channel.Remember that when a call is made, each channelis called out separately, traveling in its owndirection and ultimately rejoining at the far endsite. It is a possibility that one of the legs that achannel is utilizing is still on the ‘outdated’ 56 kbps speed.

Part 7: Videoconferencing Troubleshooting Tips andHelpful Hints

There you are at an important meeting, about to give a presentation to your colleagues

across the United States via an elaborate videoconferencing system. The audience

settles, you dial your connection, and the inevitable happens—your call cannot be

completed. What do you do? This is a scenario that has happened to all videoconference

participants at one time or another, along with many more technical obstacles.

S P E C I A L V I D E O C O N F E R E N C I N G S E R I E S

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Scenario 5: Two new systems areconfigured for videoconferencing. Thesystem models are the same with thesame codec manufacturer. System A isconfigured with three ISDN linesinputting directly into the facility. SystemB is patched into the ISDN lines via a T1connection running through a PBX.Although the configurations for thechannel numbers are identically inputinto each codec, calls cannot be madeinto System B.

Solution: Slight differences in configurationare the determining factors. System A’sconfiguration is more standardized, inputtingall channel numbers as well as the ServiceProfile Identifier (SPID). A SPID is a uniqueidentification number the telephonecompany assigns for each ISDN line toindicate that video will be transmitted (seeFigure 1).

This differs from System B’s configuration,which is running through a PBX system.Because SPIDs are not utilized in a PBXsystem, pre-defined numbers must be inputin place of a complete channel number (seeFigure 2). This enables the system to worklike a router to recognize the type of call. ForLine 1, column Number 1 and 2, the number

‘89’ can be input in place of the completechannel number of ‘7007349889’. A similarprocess is applied to Line 2 and 3, columnNumber 1 and 2—‘90’ can be input in placeof the channel number ‘7007349890’ and‘2506’ can be input in place of channelnumber ‘7007342506’. Using these numberswill allow System B to receive calls.

Scenario 6: Site A cannot connect withall six channels (384 kbps) to Site B, butboth sites can call out to other sites andconnect with all six channels (384 kbps).

Solution: New, sophisticated codecs withdiagnostic capabilities can resolve thisproblem rather quickly. When calls via IP areplaced to these codecs, the lines aremanipulated each step of the way and thecall is slotted into a specific line by blockingother lines. By process of elimination, the linenot connecting is pinpointed. If the linenumber is correctly input into the codec,there “shouldn’t” be any problem.

As videoconferencing technology progresseswith new innovations, A/V and IT arebecoming tightly integrated. Keep this inmind when designing a videoconferencesystem, and remember that there are someimportant players to network with, such as

the local phone technician, long distancetechnician, codec manufacturer supporttechnician, PBX technician, and IT technician.Building strong relationships with theseindividuals will save you many headaches inthe future.

This completes the videoconferencing series.Extron appreciates your feedback on thepreceding articles in the series and hopesthat this article will be just as beneficial.Good luck, and remember that you canalways rely on Extron for yourvideoconferencing needs.

S P E C I A L V I D E O C O N F E R E N C I N G S E R I E S

Hints to HelpDiagnose andTroubleshoot aVideoconferencing System

✓ Understand the many variables in avideoconferencing system

✓ Always schedule a test call prior tothe actual videoconference

✓ Have a list of test sites to which youcan call

✓ Build relationships with the “players”

✓ Understand the time elementinvolved in troubleshooting

✓ It is a process of elimination—justlike troubleshooting any A/V system

Figure 1. System A - Configuration with direct input.

Figure 2. System B - Configuration with PBX.

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Cable Product Line Summary

Choosing a high quality cable is critical in maintaining signal integrity, especially over long runs. When selecting

a cable there are many factors to consider including the length of the cable run, type of signal being used,

application (i.e., rental and staging vs. permanent installation), and environmental factors (i.e., temperature,

potential interference from other equipment, etc.).

15-pin HD Cables

The Extron 15-pin HD cables utilize Extron fourteen conductor mini high-resolution coax cablewith 15-pin HD connectors on both ends, either male to male or male to female. Audioversions of the 15-pin HD cables are also offered and include a stereo mini 3.5 mm connectoron each end. These cables are available in plenum and non-plenum versions.

The Extron Superflex 15-pin HD Staging cables utilize Extron BNC-5 mini HR cable for passingthe RGBHV components of a VGA-UXGA signal to the display. They are ideal for stagingapplications that do not require ID bits to be passed to the projector or monitor. They areavailable in male-to-male and male-to-female versions.

15-pin HD Staging

Extron addresses these issues by offering a full line of high quality cables and adapters to suit any A/V application, signal type, and environment asthe solution for achieving system performance goals. In addition, Extron recently reduced prices on more than 75% of bulk cables andcable assemblies so that cable cost is no longer an issue when trying to provide clients with the best possible system for their budget.

To provide a better understanding of the key features of Extron cable, we have included brief descriptions of each of the major categories ofExtron cabling below. For a comprehensive listing of Extron cables, please refer to the 2001-2002 Extron Product Catalog or visit www.extron.com.

15-pin HD Install Kits

The Extron 15-pin HD Male to 15-pin HD Install Kits utilize BNC-5 mini high-resolution cablewith a 15-pin HD male connector on one end and no connector on the other for ease ofpulling through conduit during installation. Either 15-pin male and female connectors or fivemale BNCs are provided for attachment. Install kits are available in plenum and non-plenumversions.

SY VGA/XGA Cables

The Extron SY VGA/XGA is a 15-pin HD to five 75 ohm BNCs adapter cable. It is ideal fordirect connection of a computer-video source to a display or secondary product. These cablesare available in different lengths in male to male and male to female versions.

UP TO 66%

REDUCTION

UP TO 65%

REDUCTION

UP TO 51%

REDUCTION


BNC Mini HR CableThe Extron SuperFlex BNC-4 and BNC-5 Mini HR Cables are comprised of four- or five- conductor,color-coded, 75 ohm coaxial cable wrapped in a single jacket with the corresponding number ofBNC connectors on each end. Mini HR cables are available in plenum and non-plenum versions.

BNC Super High Resolution

The Extron SuperFlex BNC Super High Resolution Cables are the highest resolution, lowestloss Extron cables. SHR cables are comprised of single, four- or five conductor, color-coded, 75 ohm coaxial cable wrapped in a single jacket with the corresponding number of BNCconnectors on each end.

BNC RC Rental & Staging Cable

The Extron SuperFlex BNC-5 and BNC-6 RC Cables are extremely durable and flexible cablesappropriate for rental and staging applications. The larger size diameter of the individualconductors improves performance and pull strength and reduces the likelihood of damageduring an event.

BNC RC Rental & Staging Flat Cable

The Extron SuperFlex BNC-5 and BNC-6 RC Flat Cables are rugged and flexible cables ideal forrental and staging applications that require cabling with a low profile. These cables fitdiscreetly under carpet and lie flat in areas that experience heavy foot traffic. The larger sizediameter of the individual conductors improves performance and pull strength and reducesthe likelihood of damage during the event.

S-Video Cable and S-Video AdaptersThe Extron S-video cable is comprised of two conductor mini high-resolution coaxial cable whichcan pass Luminance (Y) and Chrominance (C) information up to 100 feet (30.47 meters). S-videocables are available in male-to-male and male-to-female in plenum and non-plenum versions.Adapters are available in S-video to two BNCs in both male to male and male to female versions.

UTP CAT 6The Extron UTP CAT 6 Patch Cables utilize Extron UTP CAT 6 cable, comprised of fourunshielded twisted pairs of 23 AWG wires, terminated with RJ-45 plugs using protective strainreliefs. These provide low-cost alternatives to coaxial cable and are for use with Extron TwistedPair tranceivers. UTP CAT 6 cables are available in plenum and non-plenum versions, as wellas in install kits.

Bulk CableThe base cables utilized in all of the above cable assemblies are available in bulk quantitieswith connectors sold separately. The Extron bulk cables are ideal for a variety of applicationsand offer several convenient features such as internal ripcords and sequential numbering forquick and easy measurement of cable length. Bulk cable is offered in 500' and 1,000' spools.Call your Extron Customer Service Representative for information about annual quantitycommitment levels for obtaining the best dealer pricing.

Custom CablesExtron also offers a specialized service for custom cables on call. Because each A/V installation is different and connectortypes vary by manufacturer, Extron provides a quick, reliable, and cost effective solution for virtually any cableapplication, whether it be for one or one thousand cables. Call your Extron Customer Service Representative or visitwww.extron.com for details.

UP TO 57%

REDUCTION

UP TO 65%

REDUCTION

UP TO 49%

REDUCTION


than the signal that travels over a shorter length of

wire. A difference in length of only two feet will

produce a noticeable effect on a display. This is what is

referred to as skew—the signal has been skewed time

wise compared to another signal (or signals). This is a

problem, because the late arrival of any part of the

video signal will distort the image. For instance, if one

of the color signals is delayed, that color will be shifted

to the right on the image.

Figure 2 shows a case where the red and green

color signals are used in conjunction to create the

image of a lemon (the combination of red and green

results in yellow). However, if the signal is sent through

a CAT 5e/6 cable, and the red is sent on a twisted pair

with more twists per inch than the green, the longer

cable length will delay the red signal. The red will be

applied on screen after the green. Therefore, the red

will be shifted off to the right. Figure 3 shows the

effect that would be seen on the image of the lemon

if the red signal arrives late.

As Figure 3 shows, the red portion of the lemon is

shifted to the right. The red appears on the right, and

the absence of red is on the left, as only the green

signal is being drawn.

Correcting Skew Using Time DelayOne method of correcting skew is to use a skew

adjustment that is built in to the receiver unit of a

twisted pair transmitter-receiver set. Typically the

user will adjust a potentiometer, which is part of a

CAT 5 was originally developed for computer

networks, where data is sent in serial form, rather

than in parallel form. Therefore, skew was not an

issue. However, crosstalk was an issue. Ethernet

networks consist of two signals, transmit and

receive, running long distances in close proximity.

To minimize the crosstalk between individual

twisted pairs, the rate of twist is varied among the

pairs of wire. This has a side effect of making the

twisted pairs vary in length. The pairs with more

twist per inch will have a longer length.

As Figure 1 shows, the twisted pairs within a

CAT 5e/6 cable vary in length. A signal that has to

travel over a longer length of wire will arrive later

Twisted Pair Wire and Skew

As CAT 5 and 6 technologies have been introduced into the AV industry new

problems have been encountered, problems that rarely occur in coax cable

systems, and new solutions have been found. One issue that users of twisted pair cable

need to be aware of is the issue of skew, a condition where a signal may be time

delayed relative to other signals. Fortunately, since the broadcast industry encountered

problems with skew years ago, this is one problem that has already been solved, using

a tried and proven method.

T E C H C O R N E R

by Roger McCarten, Product Development Manager

Figure 1: Twisted pair length variance andsignal effect.


time delay filter, in order to delay signals so they will

all arrive at the same time as the others.

A built-in skew adjustment will also likely limit

bandwidth as part of the time filter operation. The

result is noticeable on a display; images will look

softer and not as crisp. It is the same effect seen

when using equipment that has a low bandwidth.

Distance Correction: Using a SkewCompensation Cable

Since the cause of the problem is the varying

distance between the individual wires, the obvious

solution is to add a length of coax cable (a skew

equalization cable, or patch cable) to the wire that

is shorter, to equalize the distances. Coax is

preferred as an equalization cable since it maintains

proper impedance. This is the solution the

broadcast industry has used for years, to solve this

type of problem. It only needs to be done once.

Figure 4 shows an example of how the patch cable

is used in an actual set up.

Extron uses this method with its CAT 6

installation kits. Extron’s manufacturing department

verifies the individual pairs in the CAT 6 cable are

equivalent in length. If a pair is significantly shorter

a patch cable of the proper length is supplied to

equalize the distance between the pairs. The patch

cable supplied is a coax cable with BNC connectors

for easy connection, so field installation is easy.

When the integrator receives the cable kit from

Extron, they simply install the skew adjustment

cable. There is no need for measurements or test

equipment on the installer’s part. And once the

patch cable is installed, there should be no need to

adjust for skew again.

T E C H C O R N E R

Figure 2: Normal Picture.

Figure 3: Due to the varying wirelengths, signals will arrive at the displayat different times.

CAT5 T 15HD A

H-SHIFT

BUFFERED

COMPUTER

INPUT

AUDIO

ID P

IN 4

ID P

IN 11

LOCAL MONITOR

RGB INPUT

RGB OUTPUT

R

G

B

H/HV

V

A

AUDIO

L

B

SOG C

SYNC

POWER

15V .5A DC

L

R

Figure 4: Patch cable being used in actual set-up.


NECwww.nectech.com

NEC Technologies introduced the DT100, anintegrated five-in-one LCD projector forclassroom, corporate training room,courtroom, and law office users. With itsinternal document camera, the DT100 enablesusers to project data, video, documents, 3Dobjects, and transparencies onto the screenfrom a signal integrated source. The 18.7 lbs(8.5 kgs) DT100 produces 3250 ANSI lumensand has a native resolution of 1024 x 768. Inaddition to accepting composite, S-video,component, and HTDV signals, it also acceptscomputer-video signals up to 1280 x 1024resolution. The DT100 has a suggested USDlist price of $10,995.

Recommended Extron products: For applications including corporate trainingrooms and courtrooms, the Extron ISM 482Integration Scaling Matrix switcher will addeight fully configurable input sources to theDT100 and allow an additional display to beviewed. The ISM switcher features two built-in,high performance scalers for video matrixedoutputs to allow viewing of independentimages on two displays. Audio is available onall eight inputs. The ISM 182 supports 17scaled output rates. The ISM 482 acceptsHDTV and supports 33 scaled output rates andif matrixed outputs are not desired in theapplication, then the ISS 108/408 IntegrationSeamless Switchers can be substituted.

JVCwww.jvc.com/pro

JVC Professional Products Companyannounced the DLA-QX1G D-ILA projectorwith a native 2048 x 1536 resolution forstaging/rental, post production, electroniccinemas, and HDTV applications. With acontrast ratio greater than 1000:1 and7,000 ANSI lumens, this projector displaysimages on screens up to 30 feet across. TheQX1G can display HDTV, including 720p,1080p, and 1080i through its HD-SDI inputs,as well as composite, S-video, and computerimages up to QXGA. The USD list price is$220,000.

Recommended Extron products: When using the DLA-QX1G in rental andstaging venues, adding the Extron SGS 408Seamless Graphics Switcher will enhancethe event. The seamless cuts, dissolves,wipes, and titles of the SGS 408 bringprofessionalism and style to livepresentations. The SGS 408 incorporates twovideo scalers plus a digital video mixer, andcan manage component as well as any typeof RGB input from video sources up to 1600 x 1200 resolution. If additional DLA-QX1Gs are used, more SGS 408s can beadded along with the Extron ECP-1000Event Control Panel to control up to threescreens, thereby creating a truly dynamic andengaging show.

ExtroNews publishes information about new products that are relative to the Extron product line in the New News section. Also listed arethe recommended Extron products that will complement these new display devices in their targeted applications. If you would like a newproduct to be reviewed for New News, please send a press release, literature, contact name, and a four-color slide or photo to: New News c/o Ginger Dodier, Extron Electronics, 1230 South Lewis Street, Anaheim, CA 92805, phone: (714) 491-1500, ext. 6270or e-mail to [email protected]

DLA-QX1G DT100

Fujitsuwww.plasmavision.com

Fujitsu introduced the widescreen 61-inch(155 cm) PDS-6101 Plasma for home theaterand commercial applications. The PDS-6101features a resolution 1365 x 768 pixel arrayand can display the output from virtually anyvideo source. It includes a full complementof analog and digital video connections,offers native 720p HDTV and 480presolution, and can display 1080i HDTVsignals from a DTV set-top box or otherHDTV source, as well as display the videooutput from a computer up to SVGAresolution. The USD suggested list price is$24,999.

Recommended Extron products: For switching and distribution ofHDTV/component and S-video sources to theFujitsu PDS-6101, Extron offers a selection ofswitchers and distribution amplifiers (DAs).For HDTV/component applications, the Extron SW 6 Component switcher allowsmultiple HDTV images to be switched to oneplasma, and the Extron ADA 6 Componentdistribution amplifier allows one HDTV/component image to be distributed to up tosix plasmas. For S-video applications, theExtron SW 6 SV MX can be used to switchup to six S-video sources, and the Extron SV DA 6 MX can be used to distribute one S-video source to six PDS-6101 Plasmas.

PDS-6101

N E W N E W S F R O M T H E I N D U S T R Y

Piano HE-3100

Viewsonicwww.viewsonic.com

Viewsonic unveiled its first offering in a newcategory of smart displays, the VX3600MegaMonitor, using LCoS (Liquid Crystal onSilicon) technology and having nativeresolution of 1280 x 760. The 16:9 aspectratio display offers a 36-inch diagonal image,a depth of 18-inches and weighs less than 95 lbs (43 kgs). Also built in is 2.4 Gigahertzwireless technology. The VX3600 has asuggested USD list price of $6,995.

Recommended Extron product: The Extron DVS 406 Digital Video Scalercan be combined with the Viewsonic VX3600display to add scaled and seamless switchingcapabilities. The DVS 406 features several ofExtron’s patent-pending technologies such asDynamic Motion Interpolation (DMI™), 3:2 and 2:2 pulldown detection, and Accu-RATE Frame Lock™ (AFL). The seamlessswitch can be done using a cut or a variabledissolve. Seamless switching between RGBinput one and video inputs is accomplished bylocking the scaled output rate to match the 1280 x 760 resolution of the VX3600. Up tofive video sources can be switched using theDVS 406. Inputs include one RGB pass-through or HDTV color space on BNCs,one RGB pass-through or component videoinput on BNCs, and three composite or S-video inputs on BNCs.

Sharpwww.sharpsec.com

Sharp announced the Notevision C40 LCDprojector with a native resolution of 1024 x 768. It is designed for the education,corporate, and government markets. TheC40 offers 2000 ANSI lumens and weighs10.6 lbs (4.8 kgs). This projector handlesimages up to SXGA and various Macintoshand workstation signals as well as NTSC, PAL,SECAM, and DTV video signals. It can beused for fixed installations or portable use. Ithas a suggested USD list price of $7,295.

Recommended Extron product: For fixed installations using the SharpNotevision C40, the Extron System 7SCSwitcher will offer even more inputs,making it ideally suited for the education,corporate, and government markets. TheSystem 7SC is a seven input, dual outputswitcher with scaling capabilities andadvanced film mode processing—3:2pulldown detection for NTSC and 2:2 filmdetection for PAL. Six of the seven inputs ofthe System 7SC accept composite video, S-video, component (including HDTV), orRGBHV, and the seventh input acceptscomposite video, S-video, or RGBHV. Audio isavailable on all seven inputs with adjustablegain and attenuation. The scaled output ofthe System 7SC can be configured to matchthe native resolution of the Notevision C40.The RGB signals are passed through. The System 7SC also offers projector androom control.

VX3600

N E W N E W S F R O M T H E I N D U S T R Y

Pluswww.plushometheater.com

Plus delivered the DLP Piano HE-3100projector for home theaters. It offers 450ANSI lumens, weighs 4.4 lbs (2 kgs), and hasa resolution of 1024 x 768. Among itsfeatures are 700:1 contrast ratio, native 16:9projection, and fan noise reduction to 32 dBA. Additional features also includeinputs for a wide selection of video signalsincluding composite, S-video, component,DVI-D, and computer signals up to 1280 x1024. It has a list price of $2,999 USD.

Recommended Extron product: For home theater installations using thePiano HE-3100, the Extron DVS 204 DigitalVideo Scaler offers an affordable switcherand scaler solution. Using the DVS 204, up tofour video sources can be switched. Inputsone through four consist of an RGB input asa pass-through to simplify system design, aswell as accommodate component video, S-video, and composite video. The output ofthe DVS 204 can then be scaled to the native1280 x 1024 resolution of the Piano HE-3100using proprietary Extron scaling technologiesincluding Dynamic Motion Interpolation(DMI™), 3:2 and 2:2 pulldown detection,True Rate™, and Accu-RATE Frame Lock™(AFL).

Notevision C40


ExtroNews is published by ExtronElectronics/RGB Systems Inc. No portion ofthis newsletter may be reproduced in anyform without written permission from ExtronElectronics. Every effort has been made toensure accuracy in content; however, Extronassumes no responsibility for errors andomissions in the information providedherein. ExtroNews is sent free of charge tocommunication industry professionals andend-users. Printed in the United States of America.

We welcome your comments and contributions! Please submit ideas to:

Extron Electronics, USA1230 South Lewis StreetAnaheim, CA 92805Phone: 714.491.1500 or 800.633.9876Fax: 714.491.1517

Extron Electronics, EuropeBeeldschermweg, 6C 3821 AH AmersfoortThe NetherlandsPhone: +31.33.453.4040 or +800.3987.6673Fax: +31.33.453.4050

Extron Electronics, Asia135 Joo Seng Road #04-01PM Industrial BuildingSingapore 368363Phone: +65.6383.4400Fax: +65.6383.4664

Extron Electronics, JapanDaisan DMJ Bldg. 6F, 3-9-1 Kudan MinamiChiyoda-ku, Tokyo 102-0074JapanPhone: +81.3.3511.7655Fax: +81.3.3511.7656

Copyright © 2002 Extron Electronics. All rights reserved. All trademarks mentionedare the property of their respective owners.

Extron Institute Upcoming Schedule, 2002 April 15-16 ..............................................................The NetherlandsMay 2-3........................................................................Anaheim, CAMay 11-12 ..............................................................Shanghai, ChinaMay 13-14 ......................................................................Chicago, ILMay 15-16 ......................................................................Chicago, ILMay 27-28 ..............................................................The NetherlandsJune 15-16 ..................................................................Las Vegas, NVJune 24-25 ..............................................................The NetherlandsJuly 11-12 ....................................................................Anaheim, CAJuly 11-12 ........................................................................SingaporeJuly 22-23 ..............................................................San Fransisco, CAJuly 24-25 ..............................................................San Fransisco, CA

Upcoming Tradeshows, 2002April 8-11 ..............................NAB..............................Las Vegas, NVApril 25-27............................NSCA ................................Denver, COMay 9-11 ....................INFOCOMM China ..........................ShanghaiJune 12-14 ......................INFOCOMM........................Las Vegas, NVJuly 24-26 ..................INFOCOMM Japan ..............................Tokyo

PRSRT STDU.S.

POSTAGEPAID W.M.S.

Extron® Electronics1230 South Lewis StreetAnaheim, CA 92805

Tweeker Use #63

On your mark. Get set. Go! RichieRodgers with Strong Communicationsin Ft. Lauderdale, FL, switched gearsand took his Extron Tweekers into thefast lane by converting them into anExtron Racer. A few wires, rubberfeet from a tripod for wheels, a 9Vbattery, a DC motor, along with agreat imagination, and voila! Gospeed racer! Go!

Send us a photographand brief explanationof how you use theTweeker.

If we publish it in afuture issue ofExtroNews, we’ll giveyou a free VTG 150.Please send entriesalong with contactinformation to:

Extron TweekerContest1230 South Lewis St.Anaheim, CA 92805.

Or e-mail a highresolution photo andexplanation [email protected]

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