DEWG CAP 9/30/00

DEWG CAP9/30/00

DEWG CAP9/30/00

NATNAT NPX138N NPX138N VHF-FM RadioVHF-FM Radio

Part IIPart II

NATNAT NPX138N NPX138N VHF-FM RadioVHF-FM Radio

Part IIPart II

Advanced User TrainingAdvanced User Training

on the use of Scanning, Priority, and on the use of Scanning, Priority, and Direct Frequency / Channel EditingDirect Frequency / Channel Editing


on the use of Scanning, Priority, and on the use of Scanning, Priority, and Direct Frequency / Channel EditingDirect Frequency / Channel Editing

DAFB Air Mobility Command Museum Dover, Delaware

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This is the Advanced Training for use of the NPX-138 from Northern Airborne Technology

• It is assumed for the purposes of this advanced training that the operator/student has at least some experience with frequency agile radios

• Examples of such are aviation band comm radios or certain VHF-FM applicationsRemember, this means you may press any key to continueRemember, this means you may press any key to continue

• Specific assumptions are made that the student understands the purpose of certain VHF-FM specific matters [such as CTCSS tones], and is comfortable with prior instruction on general use as covered under Part I of this user training series

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Proceed further if you desire information on Channel Scanning, Priority Scanning, and in-the-field

frequency entry.Do so only if you feel entirely confident with the preceding

material under Part I, the Basic NPX-138N User Training.

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Many radios will arrive with the default screen shown here. Your radio can be re-programmed to come on and go directly to the channel position of your choice.

For now, let’s assume this is what you see….[Page Up] [Page Up]

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ReviewReview

One makes display selections by means of 4 toggle switches.

Most references to adjustments will be with respect to one or more of these switches.

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“NEXT”

• IF your radio does power up with this screen, simply move the “NEXT” {Brightness} toggle to the left or right

ReviewReview

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• We now see the normal operating screen

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• The EDIT switch is normally centered so that important settings don’t get messed up

•You can, however, make corrections to TONE, POWER, SIMPLEX/DUPLEX, SCAN & PRIORITY choices by this means

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ReviewReview

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“And how, exactly, do I do that?”, you ask.

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• The important mode selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

• The important mode selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

Setting OptionsSetting Options

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• The important selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

• The EDIT switch in this position changes the mode of these other two switches to NEXT and SELECT, as labeled below them





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• Toggling the switch labeled NEXT takes you through the different modes or settings which can be adjusted, such as Power, Tones, Scan, etc

• These settings are “global” - They affect all channels, not just the one displayed at the time


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•The SELECT toggle makes the desired change, such as (selection) On, (selection) Off, or setting High or Low, etc

•The key is knowing what it is you want or need


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• So we know now that we can change various parameters by running thru them one at a time with the NEXT switch


• So we know now that we can change various parameters by running thru them one at a time with the NEXT switch

“NEXT”“NEXT”“SELECT”“SELECT”

•And we know we can execute the change by toggling the SELECT switch. •And we know we can execute the change by toggling the SELECT switch.

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• The first variable which comes up is the Simplex/Duplex selection

• One usually thinks of Simplex operation as direct, radio-to-radio contact, while Duplex is most often associated with repeater use


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• The Transmit mode should be left in DUPLEX, so that repeater channels will work. Duplex channels use one frequency for transmit and another for receive [Page Up] [Page Up]

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• Channels meant to be “Simplex” , such as 1 thru 4, have been programmed with TX and RX the same so they will act as simplex channels just fine [Page Up] [Page Up]

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• The next variable in this sequence is the POWER OUTPUT with a choice of HI, which is 10 Watts of power (max allowed in CAP air service), or LO, which is 1 Watt

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• The TONES selection is the next variable

• You recall from ROA training that a “channel” is comprised of 1) a radio frequency, and, 2) a sub-audible note, or tone, which rides underneath the voice audio and opens up other radios’ receivers

• The choices for the TONES setting are: ON, OFF, or TX ONLY. Leave “ON” for most general use


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• IF you need to hear a channel without your receiver tone filter on, “TX ONLY” does this. Don’t ever set to “TONES=OFF”. This cuts TX tones as well & you’ll forget, leaving it unusable for future air crews.

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• The next changeable option is the TONE DISPlay.

• In order to explain it’s significance, take a look at the main screen again, in this DISPlay mode

• Assume you’re now in the RX Display mode[Page Up] [Page Up]

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• The TONE DISPlay mode determines how that tone is labeled, for programming or reference purposes

• Choices are the audio frequency itself, such as 100.0, or the EIA# such as “12”, or other nomenclatures used by the Motorola or Wulfsberg companies [Page Up] [Page Up]

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• We refer to tone types in both simplex and repeater service by their frequency - 156.7 Hz, 203.5 Hz, etc

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• This will become important if you should need to install other users’ channels in the field

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• So, “TONE DISPlay” is simply a choice of ways to refer to the CTCSS tones you may need to enter in the field

• Let’s go back to the STep SELECTion we just left, showing the TONE DISP option and continue from there…...


• The next selectable options are the SCAN bank designator and the PRIORITY selector

• These two functions and their set-up are related, so we’ll cover them together in just a moment

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• Another selection along in the Step process lets you choose the channel you see when you POWER-UP the radio


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Once all of the STepped variables have been set, return the EDIT switch to the center position.


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Consider leaving all settings as show above:

DISPlay Switch = ID

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SCAN Switch = Normal

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Guard1/Guard2 = G1

or as directed by local command[Page Up] [Page Up]

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Channel = Air to Ground

or as directed by your local command

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Verify that you left :

POWER = HI

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TONES = ON

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EDIT Switch = <Centered>

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• We didn’t go through all selections possible within each variable option category

• Most people won’t need to change any of these aforementioned selections, but it’s good to know how to do so in the field or on a mission [Page Up] [Page Up]

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OK, let’s cover Channel Scan and Priority

• Scanning is the process of allowing the radio to listen to many channels in a repeating sequence

• The receiver stops on a channel if it’s in use, so you can hear if there’s traffic of interest to you

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SC

• The display, in ID DISPlay mode, will show “SC“ to the right of the Channel Name if it’s on the Scan List

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• If you choose to use the SCAN feature, first put your radio on the primary Channel you’re going to be working

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• Then, move the SCAN/NORM switch upwards and the radio will begin scanning channels

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• If the “home channel” becomes busy, the receiver will revert back there for you

SC

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• If a channel becomes a nuisance, toggle the CHANnel switch to “ - ” to make the radio ignore that channel

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• This temporary bypass request is reset once you leave the SCAN mode, or if you power off the radio [Page Up] [Page Up]

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• In addition to being on the normal Scan list , certain channels can be designated as Priority channels

SC PI

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• You’ll see a PI or P2 to the right of the Channel Name if

this channel was programmed as a Priority channel

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• If a Priority channel becomes active while you’re scanning, the radio will go to the priority channel [Page Up] [Page Up]

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SC PI

• This is NOT the same as a guard channel. A scanned channel is monitored in sequence; A Guard channel is monitored simultaneously regardless of other activities

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• A channel is made a Priority channel at the time of programming; This can be changed in the field by persons who know how to edit or enter channels in the field [Page Up] [Page Up]

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• We now know that there is a batch of channels listed in a main Scan group, and that there are certain ones among this group which are Priority selections

• How do we decide if we want to simply scan those in the Scan group batch, or if we want to be interrupted by Priority channels as well?


1122

SC PI

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1. Move the EDIT/STep switch to the right

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2. Use the NEXT toggle to find the SCAN options

(Note that at present, only the normal scan list is chosen)

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3. SELECT whether to scan just the LIST of scan-channels, or if you want the scan-LIST and the PRIority feature to be engaged

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“NEXT”“NEXT”

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• The use of scanning is a subject best covered in detail under self-study in front of the radio with the manual

SC PI SC PI SC PI SC PI SC PI

• Please avail yourself of this time-honored training technique

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BREAKBREAKPlease take a 15 Minute recess before continuing with this program

Please load the file NPX138 2of2 Advanced Training.ppt for the rest of this training session.






DEWG CAP 9/30/00

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Transcript of DEWG CAP 9/30/00