Calibration—475
c.
From —15°C to + 5 5 °C# from
0.01
ms
to 50 ms,
accuracy is within 4%.
d.
Exclude the following portions of the sweep, from
0.01 Ms to 1
ms
:
First 25 nanoseconds and all beyond the 100th
magnified division.
51. Check Delay Time Accuracy
a.
Error for intervals less then 1 dial division cannot
exceed 0.01 dial division.
b.
Error between any two time markers greater than 1
dial division apart cannot exceed 1%.
52. Check Delay Time Jitter
a. H O R IZ D ISPLA Y to B D L Y 'D ,
A T IM E /D IV to 1 ms,
B T IM E /D IV
to 0 .2
ms
.
b. Check for no more than 1 division jitter.
53. Check M IX Sweep Accuracy
a. Use 1 ms time markers.
b. Check for proper timing within 0.24 division.
N O T E
Exclude first 0 .5 division o f sweep after display start
and first 0.2 division, or 0.1 ps (whichever is greater)
after the transition o f A to B.
54. Adjust X Gain
a. A T IM E /D IV to X -Y ,
both V O L T S /D IV to 5 m V,
V E R T MODE to CH 2.
b. Apply 20 m V square wave from Standard Amplitude
Calibrator to CH 1 or X input.
55. Check X -Y Phasing and Bandwidth
a. Connect an 8 division display of 50 kHz signal from
Medium-Frequency Constant-Amplitude Signal Generator
to the CH 1 and 2 inputs.
b. Check X -Y phase shift is no more than 0.14 division.
c. Increase output frequency of signal generator to
2 MHz.
d. Check X -Y phase shift is no more than 0.42 division.
e. A D JU ST—L 1 103 for minimum phase shift.
f. Check bandwidth is at least 3 MHz.
56. Check B ENDS A Operation
57. Check A T R IG H O LDO FF
Should increase holdoff to nine times the T IM E /D IV
setting.
C A LIB R A TO R , + GATES, AND
E XT Z-A XIS C A LIB R A TIO N
58. Adjust C A LIB R A TO R Amplitude
a. Short emitter to base of Q 1504.
b. Check for +0.3 V DC, within 3 m V, from C A L I
BRATOR current loop to ground.
c. A D JU ST—R1515 for +0.3 V DC, within 1% from 0°C
to +40°C; for +0.3 V DC, within 1.5% from —15°C to
+55° C.
d. Remove the short from emitter to base of Q 1504.
59. Check A and B +GATES
a. A + G A TE: +5.5 V P-P, within 0.5 V .
b. B + GA TE: +5.5 V P-P, within 0.5 V.
60. Check EXT Z-A XIS Operation
a.
Connect 5 V 50 kHz signal to CH 1 input and E XT
Z -A X IS input.
c. A DJU ST—X Gain, R1102, for 4 divisions of deflec-
b. Check for noticeable intensity modulation of the
tion between the dots, within 3%.
positive peaks.
5-22
Summary of Contents for 475
Page 6: ...475 475 Oscilloscope ...
Page 20: ......
Page 46: ......
Page 151: ...A B C D E F G Fig 7 4 P 0 A4 Vertical Mode Switch circuit board ...
Page 152: ...n m m m 1 t siumm c ii im ...
Page 154: ...Diagrams 475 A B C D E F G ...
Page 155: ...GRID LOCATOR Fig 7 8 P O A3 Vertical Preamp circuit board ...
Page 157: ...Diagrams 475 ...
Page 158: ...GRID LOCATOR 2 3 4 5 6 7 8 9 1 10 11 1 12 Fig 7 10 P 0 A3 Vertical Preamp circuit board ...
Page 160: ...Diagrams 475 GRID LOCATOR Fig 7 11 A5 Vertical Output circuit board ...
Page 163: ...Diagrams 475 GRID LOCATOR Fig 7 12 P O A8 Trigger Generator And Sweep Logic circuit board ...
Page 167: ... 415 OSCILLOSCOPE B T R IG G E R G E N E R A T O R g B TR IG G E R GEN ER A TO R ...
Page 168: ...Diagrams 475 GRID LOCATOR ...
Page 172: ...SWEEP G E N ER A TO R S ...
Page 175: ...TIM IN G HORIZONTAL DISPLAY SWITCHING ...
Page 177: ...A 011 HORIZONTAL AMPLIFIER 8 l j k J Ll J Ol Z o N C O X U 1 C L O o v O o _J V v P O in r ...
Page 179: ... 476 OSCILLOSCOPE ...
Page 180: ...POWER SUPPLY ...
Page 182: ...CRT CIRCUIT ...
Page 185: ...C A L IB R A T O R A N D F A N C I R C U I T 4 C A LIB R A TO R FAN MOTOR C IR C U IT ...
Page 189: ......
Page 190: ...4 T 475 OSCILLOSCOPE FIG 1 FRO NT PANEL ...
Page 191: ...475 OSCILLOSCOPE FIG 2 MAIN FRAME ...
Page 199: ......
Page 200: ...FIG 3 RIGHT SIDE l 475 OSCILLOSCOPE ...
Page 201: ...V S X O t l B O T T OVJ 8 8 ...
Page 209: ......
Page 210: ...5 ...
Page 211: ...4 4 75 O S C ILLO S C O P E FIG 5 CAB IN ET ...
Page 215: ......
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Page 241: ... 1 I R I II9A po S IT I o n f i n e I R l 130 PAGE 4 OF 5 R 1234 Ml 9 91 9 473 ...