Tektronix 3A74 Instruction Manual page 90

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TYPICAL SWITCHED ATTENUATOR & AMPLIFIER
(4 REQUIRED)
IMPORTANT
ALL CIRCUIT VOLTAGES WERE OBTAINED WIiTh A
20,000 N/V VOM. ALL READINGS ARE IN VOLTS.
VOLTAGE AND WAVEFORM AMPLITUDE MEASURE-
VOLTAGE READINGS were
OBTAINED UNDER FOLLOWING CONDITIONS
MENTS ARE NOT ABSOLUTE. THEY MAY VARY INPUT SIGNAL.... . NONE
BETWEEN
UNITS DUE TO NORMAL MANUFACTURING
AC-GND-DC(ALL CHAN). 20.0000.
GND
PULS
TOLERANCES AND TRANSISTOR
AND VACUUM TUSE
VOLT S/DIVAALL CHAN)...
+ 02
GATING
PULS
CHARACTERISTICS.
POSITION (ALL CHAN).
.CENTERED
FROM RING COUS
ACTUAL PHOTOGRAPHS OF WAVEFORMS
ARE SHOWN,
MODE (CHAN J ) . . . 0.000000
0 0 ee NORM
CHAN. SW.DIAG
WITH THE TEST OSCILLOSCOPE SET ON + INT TRIG-
MODE
(CHAN. 2,3,64)....-......
OFF
GERING. THE TEST OSCILLOSCOPE USED HAS A TRIGGER...
BANDWIDTH OF DC TO 10 MC, ALTHOUGH A D¢ TO 300 =
CHOP.-ALT. oc eres
SC, CR BETTER, BANDWIDTH TEST OSCILLOSCOPE
MAY BE USED 1F BANDWIDTH LIMITATION 1S CON-
SIDERED, Sw430
CONTROL SETTINGS FOR THE TYPE 5G0-SERIES TOT T TTT TT 4
OSCILLOSCOPE
USED WITH THE TYPE 3A74 WERE
| ! ! |
SET TO OBTAIN A 0.1 mSEC/DIV. FREE-RUNNING er 2R 2rR 2F
SWEEP. H '
| \
sw4io \ )
Se leieteieied i~ -[VoOLTs/ow.}~. ' a fey
2R oF 3R od I 7 NORM. r
i
| | o}—9—to OFF
| t
| R40 |
on co inv.
| 10 | | t
Ont—-O NAN O-*O-4 | t
| |
o4 t |
1 l NVA ,
o++exs = +1.6-|7] | I af
C416 RAZS | I
oO
SS -78) 10K
+300V
5
oO
'
|
VOLTS/DIV, —l2.2V ' '
+125v1 I 439
R426 (DEO! | NOK
2 x100 I |
i | s s . a
s R438
to ; | 50K
-
+12aV
l !
| POSITION
R427 1
2.5M
I
' |
pe BAL. -12.2V lex
} (
\
/ \
x/
° —o {
ow! ! r
-
ee eee es oO D4
X25 CHANNEL 1
ONLY ooo
—
CHAN. 1 +125V / COMPOSITE
Yeaosc C407B Vdore INT. TRIG, (DEC) INT. TRIG.
2-38 5.8-18 5.8-1B Dc LEVEL R522 DC LEVEL
ray +o ae RB
1 50
ok C403E ste
27 H
a
xs
_——
Ycgqose C4098 A caose S525
72-8 5.5-18 2-8
+125V
—o
O
(DEC)
!
LC405E R409E A.c4ao9e
500 250K 10 R512
[SoK)
Dp5l2
ATTENUVATORS SW530
R513 -1O0V TRIGGER
Te
~12.2V SEE PARTS LIST FOR
. SEMICONDUCTOR TYPES
TYPE 3A74 PLUG=-IN
G2