PHILIPS

PM 3347 SWEEP DELAY TIME BASE

9499 440 05211 1/668/1/02/03

3

IMPORTANT

In correspondence concerning this apparatus, please quote the type number and the serial number as given on the type plate at the rear o f the apparatus.

4

Contents

GENERAL INFORMATION

I. Introduction 5

IX. Mode selector switch

X. Gated working of Time-base A

15

20

II. Technical data 6 XI. Trigger Circuit 21

III. Description of the block diagram 8 XII. Checking and Adjusting 26

A. General Information 26

DIRECTIONS FOR USE B. Time-base and Triggering 26

IV. Installation 9 C. Delay 28

V. Functions of the controls 10 D. Output Terminals 29

VI. Applications 11

SERVICE NOTES XIII. Parts list 30

VII. Time base B 13 A. Mechanical 30

VIII. Delay pick-off Circuit 13 B. Electrical 31

List of figures

Fig. Page Fig. Page

1 Survey of the controls 8 14 Generation of the intensifying pulse 17 2 X-deflection 10 15 Mode selector switch SK7 at 3 Time-base B 10 "A delayed by B" 18 4a "B" intensified by "A" 10 16 Generation of the delayed Time base A 19 4b "A" delayed by "B" 10 17 Gated working of "A delayed by B" 20 5 Calculating the delay time 10 18 Trigger Circuit 23 6 Example of a display 11 19 Right-hand side 24 7 Measuring time "T" 11 20 Left-hand side 24 8 Time jitter 12 21 Front view 25 9 Voltage comparator circuit 12 22 Delay unit; unit 5 33 10 Schmitt-trigger, 23 Time-base unit; unit 6 36

differentiator and cathode follower 13 24 Delay circuit 41 11 Generation of the delayed trigger pulse 14 25 Time coefficient switch 45 12 Mode selector switch SK7 at ".Time-base B" 15 26 Time- base generator circuit 49 13 Mode selector switch SK7 at

"B" intensified by "A" 16

5

GENERAL INFORMATION

Introduction O The PM 3347 is a trigger-delay plug-in unit for the basic oscilloscope PM 3330. The unit can supply a sawtooth voltage for X-deflection (TIME-BASE B) as well as a delayed trigger pulse. With this pulse, the time-base generator of the basic oscilloscope (TIME-BASE A) can be started.

Using this operating method, a selected part of the display can be magnified across the entire screen-width so that accurate measurements are possible.

Moreover, possible time-jitter in the magnified display can be eliminated.

6

Technical data

Properties, expressed in numerical values with state-

ment of tolerances are guaranteed by the factory.

Numerical values without tolerances are intended for

information purposes only and indicate the properties

TIME-BASE B

Time co-efficient

Length of the time-base

Operation

TRIGGERING

Source

Slope

Mode

Required trace height for internal triggering

Band-width

Required voltage for external triggering

Input impedance

TRIGGER LEVEL

internal

external

Time-base voltage on socket

"TIME-BASE"

of an average apparatus. The numerical values hold

good for nominal mains voltages unless otherwise

stated.

adlustable to 17 calibrated values: 2, 5, 10 etc. µsec./cm up to 0.5 sec./cm tolerance: -i- or — 3 0/0. Magnification X 1, X 2 and X 5 is possible on the basic oscilloscope.

continuously adjustable: 4 ... 10 cm.

triggered or free-running.

internal, external, or internal by means of a voltage with the mains

frequency (phase-adjustable on the basic oscilloscope).

-I-- or —

AUT. HF

LF

10 Hz ... 1 MHz. LEVEL and STAB. switched off. RC-time: 82 µsec. f3dB: N 2 kHz. RC-time. 56 msec.

fsas: 3 Hz. DC TV LINE :LEVEL and STAB. switched off. TV FRAME: LEVEL and STAB. switched off.

refer to the characteristics of the relevant Y-plug-in unit.

1 MHz.

0.5 Vp_p for frequencies up to 1 MHz. in position "AUT.": 1 VP_P. in positions "TV LII~TE" and "TV FRAME": 1 VP_P positive video.

1 MSz//55 pF.

adjustable over 6 cm trace height.

adjustable over 6 volts.

90 Vp_P maximum., positive-going control "LENGTH".

from zero level, adjustable with

Gate voltage on socket "-~ GATE" 35 VP_P, from zero level, synchronous with time-base voltage.

7

DELAY PULSE

Delay 2 µsec. — 5 s, continuously adjustable by means of a 17 step-switch (accuracy 3 0/0 of the front-plate value, ± 200 nsec.) and a helical potentiometer (0.2 ~/o of the final value).

Jitter ~ 1 :20.000

Output voltage on socket "DEL'D TRIGG."

Mechanical data

3 VP-P

By means of the delay pulse, time-base A can optionally be directly started (STARTS A), or, released but not started (SETS A READY). In this case, time-base A is started by the next trigger pulse.

width : 15 cm depth : 30 cm (knobs and plug included) height : 18 cm weight: 2 kg

Accessories Manual

8

Description of the block diagram (Fig. I )

The PM 3347 contains a complete time-base gen-erator (TIME-BASE B), which regarding the con-struction, largely resembles the time-base generator of the basic oscilloscope (TIME-BASE A). Besides the time-base voltage, the PM 3347 supplies a delay pulse for starting time-base A at the basic oscilloscope. For this, the sawtooth voltage of time-base genera-tor B is compared with an accurately adjustable d.c. voltage (DELAY-TIME MULTIPLIER 1 : 10). The output voltage of this comparator is applied to a bistable multivibrator, which supplies the delay pulse.

INT

TRIGG EXT

50 Hz

~—

AUT. H F. LF.

DC. Tv-

FRAME TV-LINE

LEVEL

Fig. 1. Survey of the controls

TRIGGER

PULSE

SHAPER

This delay pulse is applied to the time-base A gen-erator via the output plug. Starting of time-base A occurs at option, directly by the delay pulse (STARTS A) or by the trigger pulse (from the trigger unit of the basic oscilloscope) after time-base A has been released by the delay pulse (SETS A READY). The X-deflection voltage is selected by means of a 3position-switch: 1 —time-base B 2 —time base B, while during the time that time-

base Aoperates, the trace is intensified 3 —the delayed time-base A.

TIME BASE +GATE

~' 0

1. TIME BASE B I

2. I B INTENSIFIED BV A

3. iADEL'D BYB I

I I

J L ~ ~ ~b

DELAY TIME

MULTIPLIER 1 : 10

TIME BASE

GENERATOR B

MIXER 4 2

'~n i

3

X-PLUG 1

UNBLANKING

UNBLANKING "A"

DELAY TIME or TIME/cm

LEN GTH

STAB.

VOLTAGE

COMPARATOR

TIME BASE

TIME BASE "A"

r STARTS R— -150 V

I A DEL'D TRIGG

L SETS A READY

PULSE SHAPER

DEL'D TRIGG

Q

to „STAB" TIME BASE "A"

from „STAB" TIME BASE "A"

PEM 2785

9

DIRECTIONS FOR USE

Installation m The PM 3347 should be plugged into the right-

hand side plug-in compartment of basic oscilloscope

PM 3330 (X-UNIT). Switching-on is effected via the mains switch of the

basic oscilloscope.

BU1: BU2: BU3: BU4: BUS: R1

R2

R3

R4

Input for external triggering Output with the pos. sweep gating signal

Output with the time base "B" signal

Output with the delayed triggering signal

Earthing bush Sweeplength control Trigger level control Trigger stability control Trigger delay time control

If the PM 3347 is used, the deflection switch in the

X-DEFLECTION frame of the PM 3330 should be

put into position "X-UNIT".

r~ $U 5

SKI: Triggering mode selector SK2: Triggering slope selector

SK3: Triggering source selector SK4: Selector of the X-deflection co-efficient

or the trigger delay time (coarse)

SKS: Preset trigger stability switch

SK6: Start/release selector for time base "A"

SK7: X-deflection mode selector. Remark: At the picture, R2 and R3 were interchanged.

10

Controls and their functions

X-DEFLECTION

0 The X-deflection voltage is selected by means of the 3-position switch on the right-hand lower-side of the unit.

Time base B

The X-deflection voltage is then supplied by time-base generator B. Adjustment of time-base B is effected in the same way as described for time-base A, in the manual of the basic oscilloscope. The time co-efficient of time-base B can only be adjusted in steps. The length of the time-base can be adjusted by means of the "LENGTH" control. The time co-efficients are not influenced by this control.

B Intensified by A

In this position also, the X-deflection voltage is sup-plied by time-base generator B. When switch "DEL'D TRIGG." is in position: "STARTS A", the brightness-control voltage of time-base Atogether with that of time-base B will be applied to the Wehnelt cylinder of the CRT. Consequently, the trace will be intensified during the running of time-base A. By means of this indication, that part of the trace can be selected, which must be examined in detail.

When using the PM 3347 as a trigger-delay unit, the trigger-mode switch of the basic oscilloscope may be in any position but "AUT.".

A Delayed by B

In this position, time-base generator A supplies the deflection voltage. Time-base A is started in the same way as in position "B INTENSIFIED BY A". This means that the part of the trace which was

intensified, is then displayed across the entire screen-width.

ADJUSTING THE DELAY

If the PM 3347 is used as a trigger-delay unit, the deflection switch should be set to position "B IN-TENSIFIED BY A", to adjust the delay. Time-base B is adjusted in the normal way by means

of the controls in the "TIME-BASE B" frame.

Fig. 2. X-Deflection

Fig. 3. Time-base B

Fig. 4a. B intensified by A

J

Fig. 4b. A delayed by B

L

r

DECAY tltA

,. ' ~y A

TIhhE,rfm

~c

s

DElgy ~""+..

MUITIPIIER ~ip

Fig. S. Calculating the delay time

11

If switch "DEL'D TRIGG." is in position "STARTS

A" (this means that time-base A is triggered by the

delay pulse), the delay time will be equal to the

product of the values indicated by knobs "DELAY

TIME" and "DELAY TIME MULTIPLIER". In

Fig. 5 the delay time amounts to: 3.86 X 50 µsec. = 193 µsec.

The magnitude of the intensified part of the trace

depends on the time co-efficient of time-base A and

should consequently be adjusted by means of knob

"TIME/cm" on the basic oscilloscope. If switch "DEL'D TRIGG." is in position "SETS

A READY", time-base A is released by the delayed

trigger pulse. Time base A will be triggered by the

next pulse, generated at the trigger unit of the basic

oscilloscope.

The adjustment of time-base "A" then is effected in

the same way as with normal use of this time-base

(refer to manual PM 3330) with the restriction that

position "AUT." of the "TRIGGER-MODE" switch

may not be used.

A~~lications

The PM 3347 is particularly used when details of a

complicated, periodical signal are to be measured.

Assume that the display (Fig. 6) is obtained in posi-

tion "TIME-BASE B" of the deflection switch on the

PM 3347. Time-base B is then triggered by the clock-pulse, by

which the pattern is always started.

In this example the clock-pulse has a higher amplitude

than the other pulses. Consequently, the time-base

may be internally triggered. I f all pulses have the same

amplitude, no stable display is obtained with internal

triggering. In that case the time-base should be trig-

gered by an external voltage.

When pulse P is to be accurately measured, the

deflection switch should be set to position "B IN-

TENSIFIED BY A" and switch "DEL'D TRIGG."

should be set to position "STARTS A".

With aid of control "DELAY-TIME MULTIPLIER"

and switch "TIME/cm" of the basic oscilloscope,

part P of the display is intensified.

When the deflection switch is then set to position "A

DEL'D BY B", the intensified part (magnified across

the entire screen) is reproduced.

In this position, pulse-width, rise-time etc. can be

accurately measured by means of the calibrated time

coefficients of time-base A.

The time T (delay time of pulse P with respect to

the clock-pulse) can be measured by adjusting knob

The adjusted value of the delay time is then increased

by an additional time, which depends on the trigger

signal of the basic oscilloscope. Consequently, the

adjusted value of the knobs on the PM 3347 no

longer applies.

LENGTH

If long delay times are used (time-coefficient of

time-base A much smaller than the time coefficient

of time-base B), time-base A will have a very short

duty cycle. This means that the brightness of the

trace in position "A DEL'D BY B" is very low with

respect to the other positions.

By adjusting the length of the time-base in the posi-

tion "B INTENSIFIED BY A", so that the intensified

part of the trace just remains present, the repetition

frequency of time-base B can be increased in many

cases. Consequently, the repetition frequency of time-base

A is increased and the luminosity increases also.

"DELAY-TIME MULTIPLIER" so, that the lead-

ing edge of pulse P just coincides with the beginning

of the time-base.

T is equal to the product of the values indicated by

knobs "DELAY TIME MULTIPLIER" and "DE-

LAY-TIME".

f l Fig. 6. Example of a display

K T

P --•, ~.-

P

1

Fig. 7. Measuring time "T"

12

TIME JITTER The delay time, however, can in this case no longer be read in the above mentioned way.

Possible time jitter of pulse P with respect to the clock-pulse causes a haze and can be measured in the position "A DEL'D BY B" by means of the cal-ibrated time co-efficients of time-base A. (Fig. 8). If the measurements are impeded by time jitter, the latter can be eliminated by setting switch "DEL'D TRIGG." to position "SETS A READY" and by adjusting the controls of time-base A so, that time-base A is triggered.

+200V

813

,'_=-_~~ R116

R98 Miller Circt

+130V

-150V

Fig. 9. Voltage comparator circuit

B16p

R123

-150V

--~ ~~-ptter

Fig. 8. Time jitter

Delayed Trigger

~L Multivibrator

R129 ► R 134

814

-150V

R4

Max.Delay

"Delayt i me" Multiplier 1-10

Min. Delay

R132

+330V

PEM 2877

eta

819

Remark: The cathode of B 19 is earthed

13

SERVICE NOTES

Time base B

This plug-in unit comprises a complete time-base generator, a trigger unit and adelay-pick-off circuit. The delay-pick-off circuit delivers a pulse, after an adjustable delay, to front-panel socket BU4 and to time-base A for delayed triggering (see Fig. 1). Time-base B, like time-base A, is based on a Miller run-up circuit with the following modifications:

Delay pick-o f f circuit

Valves B13, B14 and B16p constitute along-tailed pair circuit (Fig. 9) which acts as a voltage com-parator. In the quiescent state of the voltage comparator, B13 is cut off and the cathode voltage of B14 is approximately equal to the voltage applied to the grid of B 14 from helical potentiometer (R4) "Delay time-multiplier 1-10". The range of R4 is preset by means of potentiometers R129 and R132. The ramp voltage from the output of time-base B is applied to the grid of B13, which will start to conduct when its cut-off voltage is reached. However as B 16p is aconstant-current source, sup-

1~

814a

+330`J

Schmitt -trigger

+130v

— the "Sweep-length" control is no longer a preset adjustment, but afront-panel control "Length". Continuous sweep speed control is not possible.

— the lock-out multivibrator (single-shot facility) is not duplicated.

The working of the time-base generator is not de-scribed due to its similarity with that of time-base A.

plying the cathodes of both B13 and B14, a rise in current through one (B13) will cause an equal drop in current through the other (B14). Furthermore, the use of a constant current source in their cathodes makes the current in B14 independent of the setting of R4 (the "Delay-time Multiplier 1-10"), which is used to determine the point at which the take-over

of current by B 13 from B 14 occurs. In this way the output from B14 to the Schmitt trigger starts from a constant level and provides a constant amplitude step. The voltage rise of the anode of B14 is applied to the Schmitt trigger circuit, (Delayed trigger multivibrator) consisting of valves B17' and B17". (Fig. 10). In the quiescent state B 17' is cut-off and B 17" is

+130V

Bl6t

Del d trigg BU4

20 BUX Del ~ t ri gg time -base A

Differentiator Cathode follower

Fig. 10. Schmitt-Trigger, Dif ferentiator and Cathode follower

FIG 3 PEM 2872

14

conductive. When the anode-voltage of B14, applied to the grid of B 17', rises above the switching level of the Schmitt trigger, the circuit switches over: B 17' conductive and B 17" cut-off. The anode voltage of B17" therefore rises abruptly. When the ramp-voltage drops below the cut-off level of B13 (during the fly-back interval) the anode volt-age of B 17" returns to the quiescent value. Thus a rectangular voltage wave-form is produced at the anode of B 17". This voltage waveform is differentiated by capacitor C59 and resistor R143//R144, so that positive and negative spikes appear at the grid of trigger-amplifier valve B 16t. With no input signal present, B16t is biased beyond

cut-off and the positive spikes cause it to become conductive, thus producing positive output spikes at the cathode. The negative spikes theoretically do not appear at the output; however, some effect may be evident in the output signal, see Fig. 11.

Thus, after time base B has been triggered, there follows a certain pre-determined time-delay before time base A can operate. The trigger pulse is also available at the socket "DELAYED TRIGG.". This delay can be set with controls "DELAY - TIME or TIME/cm" and "DELAY TIME MULTIPLIER 1-10" and the actual time interval is the product of these two settings.

T= ~Time~cm setting X ~~Delay time multiplier~~setting

V/B 13 g

200V

814a

330 V 817 a

r T

~ tugger point

B16t g -~

B 16 t c --~

Fig. 11. Generation of the delayed trigger pulse

BT3 14 Cathode level set bid R 4

Schmitt trigger switching level

Output of Schmit! trigger

Differentiated rectangular waveform

Output at Socket "Deli D trigger"

PEM 2895

15

Mode selector switch SK7

A. AT "TIME BASE B"

When the X-deflection switch on the main frame is at "X UNIT"* and switch SK17 on the time-base B unit at "TIME BASE B", the complete function of time-base A is taken over by time-base B. The relevant interconnections are as shown in Fig. 12.

Y-UNIT

TRIGGER CIRCUIT

TIME BASE~~B~~

0

I I

TIME BASE.B

DELAY CIRCUIT

SK7

I I SK710 I ~.' O

Time-base B provides the unblanking pulse via 8 BUX. The output of Miller circuit B drives the hori-zontal amplifier in the basic oscilloscope and the delay circuit.

eu x

X-AMPL.

10

017

2

Y (TRIGGER UNIT► CIRCUIT

Starts ';C"lO O SK6 31

Sets'A"ready o 015 ~ STAB.CONTROL

24

TIME BASE. A

Fig. 12. Mode selector switch SK7 at "Time-base B"

RESET CIRCUIT

PEM 2876

16

B. AT "B INTENSIFIED BY A"

When the X-deflection switch at the main frame is at "X UNIT" and switch SK7 on the time-base B unit is at "B INTENSIFIED BY A" the relevant interconnections are shown in Fig. 13.

The output of time-base B drives the horizontal amplifier and the delay circuit.

Note Remember that in this position, time-base A is operating via the reset circuit of the lock-out mul-tivibrator.

Y-UNIT

TR IGGE R CIRCUIT

> B/I

INTENS'D O BY"A"

~~ O OR

GATE

SK7

The output of the delay circuit is fed to the lock-out multivibrator of Time-base A via the reset circuit. Thus the Time-base A is brought into action i.e. it generates a sweep and an unblanking pulse. This unblanking pulse supplements that delivered by Time-base "B" via an OR-gate. The relevant wave forms are shown in Fig. 14.

BUX

TIME BASE.B

L DELAY CIRCUIT

10

X-AMPL

17

2

Y-UNIT

Starts'A" ~O SK6 3

TRIGGER CIRCUIT

JL

Sets"A"readyo 015 ~ STAB,CONTROL

2

TIME BASE.AI

Fig. 13. Mode selector switch SK7 at "B" intensified by "A"

RESET CIRCUIT

PEM 2874

17

Time T -Delay time X delay time multiplier"

d. c. level of Delay time multiplier setting

T ~ T~ r

I

1

r-~ I ~

_~ L, Displayed waveform

(shown full line)

i I I

J

f

1

Fig. 14. Generation o f the intensifying pulse

F

Ramp output of

time base $

Unblanking waveform time base B

Delay circuit utput pulse

Ramp output of time-base "A

~~

Unblanking waveform time base "A''

Combined Unblanking waveform

~~Starts A~~

Del. trigg. PEM 2898

18

C. AT "A DEL'D BY B"

When the X-deflection is at "X-UNIT" and switch SK7 on unit time-base B is at "A DEL'D BY B", the relevant interconnections are as shown in Fig. 15. Unblanking is provided only by Time-base "A".

The horizontal amplifier is driven from Time base A.

UN T ~ TRIGGER CIRCUIT

p." DEL'D o SK 7

BY "B'i~

I i

TIME BASE B

DELAY CIRCUIT

I ~

I SK7d,

The output from the delay circuit is fed to the lock-out multivibrator of Time base A via the reset circuit.

The portion of the display that was intensified in the previous position of SK7 is now expanded horizontal-ly to occupy the entire screen width (Fig. 16).

Bux

1

2

X-AMPL.

_ Y- TRIGGER UNIT ~ CIRCUIT

Starts~A" o SK6 31 ~

Sets'G,"ready o 1

26

~ STAB. CONTROL

TIME BASE A

Fig. 1 S. Mode selector switch SK7 at "A delayed by B"

RESET CIRCUIT

PEM 2875

19

T ~ T'

r - ~ r - ~ r r - ~ r - ~ I ( I I I I I I 1 i L_J L_J I I L_J L

d. c. level of I Delay time ~ multiplier setting

'" Starts A"

Del.trigg~

Fig. 16. Generation of the delayed time base A

Displayd waveform T' ( shown full line )

Ramp output of time -base "B"

Delay circuit output pulse

Ramp output of time-base '~A""

Unblanking waveform time -base "A"~

PEM 2893

20

Gated working o f Time-Base A

If SK6 is set to "STARTS A", the input of the S.G.M.V. of the Time-base A circuit is set below the lower hysteresis limit so that the time-base generator will start, regardless of the setting of the "Stab." control.

Thus when the delay pulse triggers Time-base A, the sweep starts immediately, see Fig. 14. If SK6 is set to "SETS A READY", the "STAB." control in Time-base A becomes operative so that

T

Trigger pulse for time baseB.l I r ,,,l r , I_,ILevel set to trigg. on higher) amplitude pulse

_,

-7I I I I I I l.. _ J L J t_ J I~- _

d•c. level of I Delay time —multiplier setting

Stability level time base A S.g.m.v. hysteresis

gap

Trigger pulse ~ from trigger

unit A

the S.G.M.V. input d.c. level can be set for triggered operation.

Thus, when the delay pulse triggers the lock-out multivibrator, the output of the latter is not sufficient to exceed the S.G.M.V. lower hysteresis limit.

The arrival of a further pulse from the trigger cir-cuit Awill therefore cause this hysteresis limit to be exceeded so that the Time-base A is locked to this pulse (Fig. 17).

T ~

I

r 1 Displayed waveform T" _ _J ` (shown full line

I

Ramp output of time -baste "B'~

Delay circuit output pulse

Lock out m. v, output of time -base A~

Ramp output of time base ;q"

Unblanking waveform time base "'A"

Del.trigg.

"Sets A ready"

Fig. l7. Gated working of "A delayed by B"

PEM 2894

21

Trigger circuit m

Compared with trigger unit A of the basic oscil-loscope this trigger circuit is of a simpler design in that the trigger amplifier consists of along-tailed pair circuit and the pulse shaper is aSchmitt-trigger. (Fig. 18) The source selection, slope selection and mode selec-tion as well as the TV synchronisation separator are identical to the ones of the basic oscilloscope (also see Fig. 43 and Fig. 44 of the basic oscilloscope). The trigger signal can be derived from either the Y-deflection signal or the mains supply (via 27BU-X). In the first case the trigger signal is applied sym-metrically to trigger amplifier B1'—B1"; in the two latter cases it is applied asymmetrically. The am-plified signal is routed from the anode of B1' to the Schmitt-trigger. The latter switches when the applied signal reaches a certain level. Thus, a square wave originates at the anode of B3" which is differentiated by'the C24—R66 network.

The resulting negative spikes will switch over the S.G.M.V. (B4"—B6') to start the time base generator, but the positive spikes are suppressed by diode GR7 to prevent undue resetting of the S.G.M.V. The level at which the Schmitt-trigger will operate is set by potentiometer R59 "Trigger Sens". The moment at which the trigger signal will reach that level depends on the d.c. potential at the B1" con-trol grid. When mode-switch SK1 is in position "DC", "LF" and "HF" this potential can be varied by means of "Level" potentiometer R2. In the "TV. Line" and "TV. Frame" positions this potential is determined by voltage divider R41 and R42; in the position "Aut.", the control grid is earthed via R43. The polarity of the trigger signal can be selected with switch SK2.

The mode of operation of the time-base generator is determined by the potential at the S.G.M.V. control grid (B4") i.e. the free-running operation or the triggered operation.

When switch SK1 is in the "DC", "LF" or "HF" position, the potential can be varied with "Stab." potentiometer R3. If the potential is low enough to underpass the S.G.M.V. lower hysteresis level the free-running mode of operation is obtained; otherwise the triggered mode of operation is obtained. When the "Stab." control is in the "Preset" position, switch SKS is thrown and the potential of the S.G.M.V. control-grid is determined by the setting of "Preset Stab." potentiometer R113. This also applies to the "TV. Line" and "TV. Frame" position of SK1.

When SK1 is in the "Aut." position, the potential is controlled by the automatic stability control circuit built around B2. If no trigger signal is present, the B2p anode voltage is made low enough to obtain the free-running mode of operation by adjusting the "Aut. Free-run" potentiometer R28. If a trigger signal is present, it is rectified by diodes GR2 and GR3.

A negative voltage then arises at the B2p control grid, which causes the anode potential to rise slightly so that a triggered mode of operation is obtained. The B2p anode voltage is clamped in the positive-going direction by diode GR4 to a d.c. level, present at the cathode of cathode-follower B2t and which is adjusted by "Aut. Trigg. Level" potentiometer R33. This is to keep the time base generator in the trig-gered mode when the amplitude of the trigger signal ahead of the control grid of B2p increases.

23

24BU X~

1sux~ BU1

278U X (SOHz)

lnt

~o SOHz~—.

C

T V Frame oTV Llne

SK1jpCo 0

HF 12

13'

Sync. Sep.

_/L

R39 ' R37

+130V

~R41

R2 Level

SK1

R19

R43

C22

Trigger Ampl. +130 V +200 V

R21 I IR46

C14 GR3

GR2

-150 V

R3 Sta0.

R53

+2o~v ScFmitt- +zo~v Trigger

R54 I R64

1023

►--IR63

B3~ EBBCC

R62 ~ +130 V R57

R61

R65

5

R66

R44 R58

-150 V Preset Stab.

Trigg. Sens.

R24■ ■R26

Aut, Free-run

= 82p EBOCF

R17

R19

-150V

-150V

R109' R1

93° E88CC

82t E80CF

GR4

N R 29

-150 V

C2< R67

Auto-stability-control

R31

Aut. Trigg.Level

R66

R107

-150 V R33

R34

-150 V

PEM 2786

S.G.M.V.

82" E88CC

e4"

811"

Hold-off CIrCUIt

Fig. 18. Trigger Circuit

24

R 33 R 28

R 13 R ~g

Fig. 19. Right-hand side

Fig. 20. Left-hand side

PEM 2835

Fig. 2I. Front view

26

Checking and adjusting

A. GENERAL INFORMATION

With the aid of these data, it is possible to carry out all the adjustments of the delay time base PM 3347 and to check the proper working of the plug-in unit. For this, the unit should be inserted into the X-plug-in compartment of acorrectly-adjusted basic oscil-loscope PM 3330. To adjust the time co-efficients and the delay, a number of time-marker signals with accurately known time-intervals is required. For the checking and adjusting of the trigger unit and the time-base generator B, a Y-plug-in unit PM 3333 or another single channel plug-in unit is required. Some of the adjusting elements are on the left-hand side of the unit and are not directly accessible. When these elements must be adjusted, the unit should be connected to the basic oscilloscope via an extension plug (codenumber 4822 263 70009). For a complete adjustment of the instrument the sequence as described in this chapter is to be pre-ferred.

B. TIME BASE B AND TRIGGERING

For the next checking and adjusting points set the below mentioned knobs to the following positions:

Unit PM 3347

"TRIGG. MODE" (SK1) to "H.F." "TRIGG. SOURCE" (SK3) to "INT." SK7 to "TIME BASE B" LENGTH (Rl) clockwise

Basic oscilloscope PM 3330

"X-DEFLECTION" to "X-UNIT" "MAGNIFIER" to "X 1"

1. Stability

— Set "LEVEL" (R2) to its centre position and "STABILITY" (R3) to "PRESET".

— Apply asine-wave voltage with a frequency of 10 kHz to the PM 3333 and adjust the trace height to 3 cm.

— Set "TIME/cm" (SK4) to position " 20 µ.sec./cm" and turn "PRESET STAB." (R113) fully clock-wise.

— Turn R113 so far anti-clockwise that awell-trig-gered display is obtained.

— Check the triggering at different time co-efficients. The time-base generator should not stop and no double trace should be displayed; if necessary, slightly readjust R113.

— Turn "STAB." (R3) fully clockwise; the time-base generator should then be free running.

— When R3 is turned anti-clockwise, a triggered display should be obtained. When R3 is turned still further anti-clockwise while SKS is not yet switched over, the time-base generator should stop and no time-base line should be visible.

2. Trigger sensitivity

— Set "STAB." (R3) to "PRESET". — Switch off the level control by short-circuiting the

cursor of "LEVEL" (R2) to earth. — Apply such a voltage to Y-plug-in unit PM 3333,

that the trace height is 1 mm. The easiest way to obtain this result is to apply the .2 V calibration voltage to the input of the am-plifier, the deflection factor of which has been adjusted to " 2 V/cm".

— Adjust potentiometer "TRIGG. SENS." (R59) for a well-triggered display.

— Remove the earthing connection of the cursor of R2.

3. Trigger slope and level

— Apply asine-wave voltage with a frequency of 10 kHz to Y-plug-in unit PM 3333 and adjust for a trace height of 6 cm.

— Set "TRIGG. SLOPE" (SK2) to position "-{-". The time-base generator should then start on the positive-going edge of the sine wave.

— With "TRIGG. SLOPE" (SK2) to position "—", the time-base generator should start on the nega-tive-going edge.

— It should be possible to shift the starting point continuously over the edge of the sine wave across the entire trace height of 6 cm, by means of "LEVEL" (R2).

— With "LEVEL" (R2) fully clockwise and anti-clockwise, the time-base generator should not operate.

4. Internal triggering

T.V. FRAME

— Set "TRIGG. MODE" (SK1) to "T.V. FRAME" and "TRIGG. SLOPE" (SK2) to "—".

27

— Connect a positive video signal to Y-plug-in unit PM 3333.

— At a minimum trace height of 2 cm, check that a display is obtained, which is triggered on the frame-synchronization pulse. In this case, the trace will start with aframe-syn-chronization pulse.

— In position "T.V. FRAME", "LEVEL" and "STA-BILITY" should have no influence on the display.

T.V. LINE

— Set "TRIGG. MODE" (SK1) to "T.V. LINE" and "TRIGG. SLOPE" (SK2) to "—".

— Apply a positive video signal to Y-plug-in unit PM 3333.

— At a minimum trace height of 2 cm, check that a display is obtained which is triggered on the line-synchronization pulse. In this case the trace will start with aline-syn-chronization pulse.

— In position "T.V. LINE", "LEVEL" and "STA-BILITY" should have no influence on the display.

D.C.

— Set "TRIGG. MODE" (SK1) to "D.C.". — Adjust the time-base generator to its free-running

position and place the time-base line to the centre of the screen with the Y-shift control.

— Apply asine-wave voltage with a frequency of 10 kHz to the Y-plug-in unit and adjust for atrace-height of 3 mm. Set "STAB." (R3) to position "PRESET". Check that after correct adjustment of "LEVEL" (R2), the time-base generator is triggered by the input voltage.

— Increase the trace height to 3 cm. When shifting the trace in vertical direction the starting point of the time-base line should con-tinuously shift across the edge of the sine wave, but stay at the same place on the screen.

L.F.

— Set "TRIGG. MODE" (SK1) to "L.F.". — Apply asine-wave voltage with a frequency of 3 Hz

to plug-in unit PM 3333 and adjust for a trace height of 3 mm.

— Check that after correct adjustment of "LEVEL" (R2), the time-base generator is triggered by the input voltage. "LEVEL" (R2) can easily be preset with a higher frequency of the input signal. The vertical shift on the plug-in unit should have no influence on the trigger level which has been adjusted with "LEVEL" (R2).

H.F.

— Set "TRIGG. MODE" (SKl) to "H.F.". — Apply asine-wave voltage with a frequency of 3 Hz

to plug-in unit PM 3333 and adjust for atrace-height of 1 cm. It should be impossible to trigger the time-base generator with this L.F. voltage.

— Increase the frequency of the input voltage to 2 kHz and 1 MHz resp. and adjust for a trace height of 3 mm. After correct adjustment of "LEVEL" (R2), the time-base generator should be triggered with the input voltage.

AUT.

Set "TRIGG. MODE" (SK1) to "EXT.". — Turn potentiometers "AUT. TRIGG. LEVEL"

(R33) and "AUT. FREE RUN." (R28) fully clock-wise.

— Without any input voltage on Y-plug-in unit PM 3333, turn "AUT. FREE RUN." (R28) anti-clockwise until the time-base line just appears, and turn R28 15 ° further anti-clockwise.

— Apply a voltage with a frequency of 10 kHz to the Y-plug-in unit and adjust for a trace height of 3 cm.

— Adjust "AUT. TRIGG. LEVEL" (R33) so, that the time-base generator is triggered with his voltage.

— Vary the trace height from 0 to 6 cm. From a minimum trace-height of 5 mm to 6 cm, the time-base generator should be triggered with the input signal. W ith a trace height of less than the trigger limit, the time-base generator should remain free-run-ning. Check that the time-base generator is triggered at a minimum trace-height of 8 mm at frequencies of 10 Hz and 1 MHz respectively.

— In position "AUT.", "LEVEL" and "STAB." should have no influence on the display.

5. External triggering

— Set °'TRIGG. SOURCE" (SK3) to "EXT.". — Apply asine-wave voltage of 0.4 VP_p from the

same voltage source as connected to the Y-plug-in unit, to EXT. (BU1).

— Adjust the frequency of the input voltage to 1 kHz and adjust "TRIGG. MODE" (SKl) to "H.F.".

— After correct adjustment of "LEVEL" (R2), the time-base generator should be triggered with the external voltage on BU1.

— Remove the voltage from BU1; the time-base

28

generator should not be triggered any longer, so the time-base line should not be visible.

6. Triggering 50 Hz

— Set "TRIGG. SOURCE" (SK3) to 50 Hz and "TRIGG. MODE" (SK1) to "L.F ".

— Apply a sine-wave voltage with the mains fre-quency to the Y-plug-in unit.

— After correct adjustment of "LEVEL" (R2), the time-base generator should be triggered by an internal voltage with the mains frequency.

— It should be possible to shift the starting point of the time-base line across the sine-wave by means of control "50 Hz PHASE" of the basic oscil-loscope.

7. Time co-efficients

To adjust the time co-efficients, trimmers C33 and C36, which are located on the left-hand side of the unit, should be adjusted. To gain access to these trimmers, the unit to be measured should be connected to the basic oscil-loscope via the extension plug. — Set the below mentioned knobs to the following

positions:

UNIT PM 3347

"TIME/cm" (SK4) to " 20 µsec./cm". "LENGTH" (R1) clockwise.

BASIC OSCILLOSCOPE

"Magnifier" to "X 1".

— Apply atime-marker signal with a time interval of 20 µsec. to a Y-plug in unit (PM 3333). Adjust "LEVEL" (R2) for a triggered display and, with C36, adjust the time co-efficient so that 8 periods have a width of 8 cm; tolerance 1 0/0• Measure the time co-efficient across 8 cm (sym-metrical around the centre of the screen). Change the time interval to .2 msec. and set "TIME/cm" (SK4) to ".2 msec.". Adjust "LEVEL" (R2) for a triggered display and with C33 adjust the time co-efficient so, that 8 periods have a width of 8 cm; tolerance 1 0/0. Check the time co-efficients in all not yet men-tioned positions of "TIME/cm" (SK4). Select the time marker signals so that they correspond with the time co-efficient selected with "TIME/cm" (SK4). Measure the time co-efficient across 8 periods; the periods should have a width of 8 cm; tolerance 2 1/4 ~/0.

8. Sweep length

— With "LENGTH" (R1) turned fully clockwise check the length of the time-base line. In all posi-tions of "TIME/cm" (SK4), the time-base line should be longer than 10 cm. If necessary, select a different value for R102.

— With "LENGTH" (R1) turned fully anti-clockwise and "TIME/cm" (SK4) to "1 msec./cm", the length of the time-base line should not exceed 4 cm.

C. DELAY

Before carrying out this measurement, it is necessary to check that the time co-efficients are correctly adjusted (see point B7). The delay is adjusted by means of the adjusting potentiometers "MIN. DELAY" (R132) and "MAX. DELAY" (R129). These potentiometers are found on the left-hand side of the plug-in unit. To gain access to the potentio-meters, the unit to be measured should be connected to the basic oscilloscope via the extension plug.

1. Adjustment of the counter knob "Delay-time multiplier"

— Turn knob "DELAY-TIME MULTIPLIER" (R4) fully anti-clockwise and check that the counter indicates 0.00 in this position.

— If it should be necessary to readjust the knob, it can be unscrewed by means of the small key which is found behind the frontplate (see Fig. 23).

— Turn the shaft of R4 fully anti-clockwise. — Replace the counter knob on the shaft and tighten

the knob by means of the fixing screw.

2. Min. delay and max. delay

— Set the below mentioned knobs to the following positions:

UNIT PM 3347

"TRIGG. MODE" (SKl) to "AUT." "TRIGG. SLOPE" (SK2) to "~-" "TRIGG. SOURCE" (SK3) to "INT." "DELAY TIME" (SK4) to ".2 msec." "DEL'D TRIGG." (SK6) to "STARTS A" "DEFLECTION" (SK7) to "B INTENSIFIED BY A" "LENGTH" (R1) fully clockwise "DELAY-TIME MULTIPLIER" (R4) to "2.00" BASIC OSCILLOSCOPE PM 3330 "TRIGG. MODE" to "H.F." "TIME/cm" to ".5 µsec./cm" "X-DEFLECTION" to "X-UNIT" "MAGNIFIER'" to "X 1"

29

— Apply atime-marker signal with atime-interval of .2 msec. A triggered display should then be obtained.

— With "INTENS" (R6) of the basic oscilloscope, adjust the intensity so, that at the initial part of the oscillogram an extra intensified part is ob-tained.

— It should be possible to shift this intensified part with "DELAY-TIME MULTIPLIER".

— Set R4 to position "1.00". — With "MIN. DELAY" (R132) adjust the delay time

to ".2 msec."; in this case, the start of the inten-sified part should exactly coincide with the start of the second period.

— Turn R4 to position "9.00". — With "MAX. DELAY" (R129), adjust the delay

time to "1.8 msec." by making the start of the intensified part coincide with the start of the 10th period.

— Because the adjustments of "MIN. DELAY" and "MAX. DELAY" influence each other, it is neces-sary to repeat the adjustments several times. For this, set R4 to position "1.00" again and ajust R132 so, that the intensified parts coincides again with the start of the second period. Set SK7 to position "A DEL'D BY B". Across the entire width of the screen, that part of the signal that was indicated by the extra intensity,

should be visible. In these positions of SK7, the "MIN. DELAY"

can be accurately determined, because the start of the time-base line should coincide with the start of the second period; if necessary, slightly readjust R132. Set R4 to position "9.00" and readjust "MAX. DELAY" (R129) so, that the start of the time-base line coincides with the start of the 10th period.

— Repeat the adjustments of R132 and R129 until the delay times are accurate in the positions "1.00" and "9.00" of R4.

3. Delay-time multiplier 1:10

After adjustment of "MIN. DELAY" and "MAX. DELAY" (point C2), check the intermediate positions of R4. — For this, set SK7 to position "A DELAYED BY

B" and always adjust R4 so, that the start of the time-base line coincides with the start of the 3rd to 9th period.

— The indication of the counter knob should lie be-tween the values mentioned in the next table.

Period Indication counter knob

2nd "1.00" 3 rd "1.98" — "2.02" 4th "2.98" — "3.02" 5th "3.98" — "4.02" 6th "4.98" — "5.02" 7th "5.98" — "6.02" 8th "6.98" — "7.02" 9th "7.98" — "8.02"

10th "9.00"

4. "Del'd Trigg." (SK6)

— Set the knobs to the positions indicated under C2. — With SK6 in positions "STARTS A", the inten-

sified part should shift continuously across the trace when varying the delay time by means of the "DELAY-TIME MULTIPLIER" (R4).

— Set SK6 to position "SETS A READY". — On the basic oscilloscope, set the "TRIGG. SOUR-

CE" to "INT." and "STAB." to "PRESET". — On the basic oscilloscope, adjust "LEVEL" so that

the intensified part becomes visible. — When the "DELAY TIME" is varied, the inten-

sified part should repeatedly jump one period.

5. Jitter

The jitter should amount to maximum .005 0/0 of the final value of the selected delay time. With "DELAY TIME" (SK4) to position " 2 msec.", this corresponds to 100 nsec. — Set SK7 to position "A DEL'D BY B" and "TIME/

cm" on the basic oscilloscope to ".2 µsec./cm"; set the other knobs to the positions indicated in section C2.

— The basic oscilloscope: check that knob "AMPL. CAL." (SK13) is set to "OFF"; set "TRIGGER SOURCE" (SK3) to position "EXT.".

— Apply a time marker signal with atime-interval of 100 µsec. and adjust "DELAY TIME MUL-TIPLIER" (R4) so that the leading edge of the 3rd pulse becomes visible. The idication of the counterknob is then about 2.00.

— The maximum jitter may amount to (2.00 X 2 msec.): 20000 = 200 nsec. In connection with the "TIME/cm" setting of Time-base A, this corresponds to a maximum shift of 1 cm on the screen.

D. OUTPUT TERMINALS

— Adjust time-base B to its free-running position, with a time co-efficient of ".1 msec./cm".

— On the output terminals "+ GATE" (BU2), "TIME BASE" (BU3) and "DEL'D TRIGG." BU4), synchronous voltages should be available, as shown in Fig. 11 and Fig. 26.

30

Parts 1 ist

A.

Item

MECHANICAL

Fig. Qty Code number Description

1 21 1 4822 455 80036 Text plate

2 21 4 4822 413 40112 Knob 23 ~

3 21 3 4822 413 70037 Cover 4 21 2 4?22 277 20014 Sliding switch

5 21 1 4322 265 10004 BNC connector

6 21 3 4822 290 40011 Terminal

7 21 1 4822 413 40211 Control knob 23 ~

8 21 2 4822 413 30085 Control knob 14.5 ~ 9 21 2 4822 413 70039 Cover

10 21 1 4?22 413 30082 Terminal

11 21 1 4822 413 90008 Counter knob

12 29 1 4822 265 60002 32-pole plug

13 29 1 4822 273 80037 Switch SK1

14 19 1 4822 273 40081 Switch 5K3 15 29 1 4823 273 60022 Switch SK4

16 19 1 4822 273 50038 Switch SK7

i7 19 1 4822 216 50107 Unit 5 18 19 1 4322 216 50033 Unit 6

31

B. ELECTRICAL — ELEKTRISCH — ELEKTRISCH — ELECTRIQUE — ELECTRICOS

This parts list does not contain multi-purpose and standard parts. These componenu are indicated in the circuit diagram by means of identification marks. The specification can be derived from the survey below.

Diese Ersatzteilliste enthalt keine Universal- and Standard-Teile. Diese rind im jeweiligen Prinzipschaltbild mit Kennzeichnungen versehen. Die Spezifikation kann aus nachstehender Ubersicht abgeleitet werden.

In deze stuklijst zijn geen universele en standaardonderdelen opgenomen. Deze componenten zijn in het principeschema met een merkteken aangegeven. De specificatie van deze merktekens is hieronder vermeld.

La presente liste ne contient Paz des pieces universelles et standard. Celles-ci ont ete reperees dons le schema de Principe. Leurs specifications soot indiquees ci-dessous.

Esta lists de componenten no comprende componenten universales ni standard. Estos componenten estan provistos en el esquema de principio de una mares. EI significado de estas marcaz se indica a continuacidn.

Carbon resistor E24 series Kohleschichtwiderstand, Reihe E24

Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 ~~

Koolweerstand E24 reeks 0,125 W 5% 0 Koolweerstand E12 reeks 1 W 5 2,2 MS2, 5% Resistance au carbone, serie E24 Resistance au carbone, serie E12 >2,2 Mi2, 10% Resistencia de carbon, serie E24 Resistencia de carbon, serie E12

~~ Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 ~~ ~'

Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12

Koolweerstand E12 reeks 0,25 W < 1 Mfg, 5% Koolweerstand E12 reeks 2 W 5% Resistance au carbone, serie E12 Resistencia de carbon, serie E12

> 1 MS2, 10%, Resistance au carbone, serie E12 Resistencia de carbon, serie E12

'~ Carbon resistor E24 series Kohleschichtwiderstand, Reihe E24

Wire-wound resistor Drahtwiderstand

Koolweerstand E24 reeks 0,5 W <_ 5 Mil, 1% Draadgewonden weerstand 0,4 — 1,8 W 0,5% Resistance au carbone, serie E24 > 5 < 10 Mfg, 2% Resistance bobinee Resistencia de carbon, serie E24 > 10 Mfg, 5 Resistencia bobinada

Carbon resistor E12 series ~~

Wire-wound resistor Kohleschichtwiderstand, Reihe E12 Drahtwiderstand Koolweerstand E12 reeks 0,5 W 51,SMi2, 5% Draadgewonden weerstand 5,5 W < 200 SZ, 10% Resistance au carbone, serie E12 j1,5Mf2,10% Resistance bobinee > 200 SZ, 5% Resistencia de carbon, serie E12 Resistencia bobinada

Tubular ceramic capacitor Rohrkondensator Keramische kondensator, buistype Condensateur ceramique tubulaire Condensador ceramico tubular

Tubular ceramic capacitor Rohrkondensator Keramische kondensator, buistype Condensateur ceramique tubulaire Condensador ceramico tubular

Wire-wound resistor Drahtwiderstand Draadgewonden weerstand Resistance bobinee Resistencia bobinada

Ceramic capacitor, "pin-up" Keramikkondensator "Pin-up" (Perltyp) Keramische kondensator "Pin-up"type Condensateur ceramique, type perle Condensador ceramico, version "colgable"

"Microplate" ceramic capacitor Miniatur-Schei benkondensator "Microplate" keramische kondensator Condensateur ceramique "microplate" Condensador ceramico "microplaca"

Mica capacitor Glimmerkondensator Micakondensator Condensateur au mica Condensador de mica

SERVICE

500 V

700 V

500 V

30 V

500 V

10 W 5%

Polyester capacitor Polyesterkondensator Polyesterkondensator Condensateur au polyester Condensador polyester

Flat-foil polyester capacitor Miniatur-Polyesterkondensator (flack) Platte miniatuur Polyesterkondensator Condensateur au polyester, type plat Condensador polyester, tipo de placaz planaz

Paper capacitor Papierkondensator Papierkondensator Condensateur au papier Condensador de papel

Wire-wound trimmer Drahttrimmer Draadgewonden trimmer Trimmer a fil Trimmer bobinado

Tubular ceramic trimmer Rohrtrimmer Buisvormige keramische trimmer Trimmer ceramique tubulaire Trimmer ceramico tubular

For multi-purpose and standard parts, please see PHILIPS' Service Catalogue.

Fiir die Universal- and Standard-Teile siehe den PHILIPS Service-Katalog.

Voor universele en standaardonderdelen raadplege men de PHILIPS Service Catalogue.

Pour lee pieces universelles et standard veuillez consulter le Catalogue Service PHILIPS.

Para piezas universales y standard consulte el Catalogo de Servicjo PHILIPS.

} 1 }

400 V

250 V

1000 V

32

RESISTORS

Nr. Code number Value Watts % Description

Rl 482210120109 10 k52 Potentiometer R2 4822 102 20011 2 X 100 kS2

Duo

potentiometer R3 see R2 R4 4822 103 40006 50 k52 5 Helipotentiometer R28 4822 103 20091 4.7 k52 3 Potentiometer R33 4822 103 20094 10 k52 3 Potentiometer R59 482210120112 47 kS2 Potentiometer R72 4822 116 50074 56 k52 1 1 Carbon R73 4822 116 50423 39 kS2 1 1 Carbon R84 4822 116 50071 750 k52 0.5 0.5 Metal film R85 4822 116 50069 300 k52 0.5 0.5 Metal film R89 4822 116 60028 82 kS2 2 5 Carbon R113 482210120113 100 k52 Potentiometer R128 4822 116 50073 27 k52 0.5 1 Metal film R129 4822 103 20094 10 k52 3 Potentiometer R132 4822 103 20094 10 kS2 3 Potentiometer R133 4822 116 50074 56 kS2 0.5 Metal film

CAPACITORS

Nr. Code number Value Volts % Description

C28 1 µF C29 4822 11130192 100 nF Sweep time capacitor C31 10 nF C32 4822 123 10203 976 pF 250 5 Mica C34 4822 120 60078 82 pF 500 1 Mica C44 4822121 40071 680 nF 250 10 Polyester

VALVES

Item Type number Description

B1. B3, B4 E88CC Duo triode B6, B11, B12 B17 B2, B8, B16 E80CF Triode-penthode B7 5726 Duo diode B9 ZA1004 Neon tube B 13, B 14 5654 Penthode B 18, B 19 ZZ 1000 Neon voltage stabiliser

SEMI CONDUCTORS

Item Type number Description Ordering number

GRI, GR10 BAY38 Diode 4822 130 40256 GR2, GR3 OA200 Diode 4822 130 30139 GR4 OA70 1) Diode 4822 130 30221

GRS, GR7 AAZ17 Diode 4822 130 30283 GR6 OA85 Diode 4822 130 30225 GR8, GR9 AAZ15 Diode 4822 130 30229 TS1, TS2, TS3 ASZ20 2) Transistor 4822 130 40485

1) May be replaced by AAZ17 4822 130 30283 2) May be replaced by ASY76 4822 130 40259

33

105K1 $A +6.3Y

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o-{ R 9 6 }a R 9 7 ~--o

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i

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41

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B18 — 819 PEM 2174

Fig. 24. Delay circuit

45

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1 2

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6 O y ~ ~

8 0

9 0

10 C

11 0

12 0

13 0

14 O

15

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17 ° 18

19 ~~'~ 20 21 O

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PEM 3096 A

A

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10

11~

+G,3V ~ 12~

14~

35K6 15

16~

1~~9

81-B3-64-B6-811-612

~A

~B

GR1-GR4 GR6

~17 ►45K7F

~ff B3, 8,7

X18 iff 82,16

~✓♦R147,fiB16

~~ .+200V

~Z ►lSK7A

~iyy3 ► ff B17 (+70 V)

r4 ► 65K3F 125 ►ff B17

~6 ►11SK7F

IZZ /-R6

~- iff 82,161-70V)

I34 ~ -150V

i31 ►25K6 2

022

R100

A

K

GR2 GR3

f f 4

62- B7- BS

lA

~K

GR5-GR7 GR8-GR9

S SK1 A

0 1C3 ~

• 9 ~ /OK 1QUO

B9 k~a

248U X

R7

6 27 BU X~-~•33

BU1

1BUX~

R

L4

SK3F

8

S K3A 12

10

~6K

R9

6.75 V f

OV

_ SK 2

O

TV. SV11C} SEPARA70R !,a: .

GR 5 AAZ 17 B

11

SK1I A

ASZ20 R12

Cb

tom'--'

1.4V 5+4~r--~---~-_-

;; +6.25 V

\O6

3

-6,3 V

T5 2

ASZ2o

+6,3V

+6,2V --- --{-

11V

it

60. C1i56K e3

R37 F~ R39

+170V

R41

T53

ASZ20

10

SK1- A

4.8 V _i

i 211K5

~ 1Mr' R40

11 II

i SK1 F

~5 5 i

/ SK1 F

1

0.5 V ~ ~

~ -100mV

17

~ C9 • 3K9

C9•~ 3K9T•

GR6 C11LL • r

OA85 3K9

~C10 •T 3K9

4.25 V OV

R43

C22

11K5

TRIGGER AMPL.

t 130V

-1•E88CC 3

R36

--'SOV

+100 V

1± V

+190 V

R44 --- ~~00

E81~ 88CC ~R45

I L_

\T

_f4.8 V

+ 200 Y

R5

83' EBBC

SCHMIDT TRIGGER

-150V

f7K14 GR3

OA2~2 GR2= C16~ ~,R22

OA 202 G7K •-

• •

+200V

C 23 27 R63

~022~- ~j ---

R61

RGS

+13ov

a SK1 A

_~8p 3

3 r -O

R23

-ISOV

3

R2

-150V

+125V

60 V

R78

+200 V

7,2V ~ ~~

B 3' E 88 CC

1

R708 ~~ ___ 812

10 022 2 E88CC

C 52 ~~.~~ 3 T 1K5 3

I

R66

R27

R 28

-150V

GR4

-150V+130 V

C25

+200V

R68 ~~ ~o R69 ~ EBBC R71

6t ~~022

C 24 R67 ~~ 84"

f o22 ~ - EBBCC

100 ~ i ~~

8

h

+130V

1

R79

• R72 ~ 5.6~C26

T R 76

17 SZ R70

R73 a

-150V

X76

612"j ~\ ~ R 10 6

EBBCp - 91T~~

II

r -37 V ~ ~

17BUX 9BUX 228UX 6BUX

GR9 AAZ I S

B 4' E 88CC~~

-i50V

SWEEP GATING

MULTIVIB

~1 j

-57.SV

R 107

- 150V

1

B2t / E80CF - -

N OA70

B2RE$OCF

R31 g {o22h

R 29

-150V

AUTOMATIC STAB. CONTR:

R32

R 33

R34

-150V

HOLD. OFF. CIRCUIT

B 11' E88CC -

~C51

CI.p,C41

SK42F -i50V

42.5 V

42.5 V

R 82

I i

ep

i 11 I

1 I G R10 BAY38

N tz •6

SK7A

—2.4 V

0+ V

,~

SK4TA SK F I+130V+400Y

. • ~

87~ 5726

83 B7" . 1

C TB=C28,29,31, C 32,34,

N ~ R701

i 2

_L~TB I I I i

RB9

E80CF

~ TB=R80,84,85, ~~ R86,87,90

1

-150V

a 3 90K

26BUX WBUX

I I 11

R1G I I

/

n O

--41 10 SK7F

~ 36 1K R~3

8 9 ,~ A 1006

Y

-lsov MILLER TB CIRCUIT

+2o0V

R94 R96

R 98

R99

-150V

+130V

R110

R113

R115

B 8fEBpCF

R 97

-150V

318U X

-150 V

~`n

,

I ~

I~

6

_ B11~~ EBBC

e.y

0 R116

110V

-SV

DELAY CIRCUIT

f Qo BU3 --~~—~

-150V

--O

158U X

O

PEM 2173 A

Fig. 26. Time-base generator circuit

49