PART I I I —C A LIB R A TIO N
Calibration—475
Introduction
The following procedure returns the 475 to correct
calibration. All limits and tolerances given in this procedure
are calibration guides and should not be interpreted as
instrument specifications except as specified in the Specifi
cations section of this manual. Where possible, instrument
performance is checked before an adjustment is made. For
best overall instrument performance when performing a
complete calibration procedure, make each adjustment to
the exact setting even if the C HECK— is within the
allowable tolerance.
Outline to Part I I I —Calibration
POWER SUPPLY C A L IB R A T IO N
1. Check Power Supply DC Levels and
Ripple
Page 5-25
2. Check High Voltage Power Supply
Page 5-26
DISPLA Y and Z -A X IS C A L IB R A T IO N
3. Adjust CRT Grid Bias
Page 5-26
4. Check A STIG Control
Page 5-27
5. Check Display Controls
Page 5-27
6. Adjust Trace Alignment
Page 5-27
7. Adjust Y-Axis Alignment
Page 5-27
8. Adjust Geometry
Page 5-27
9. Adjust Z-Axis Compensation
Page 5-28
V E R T IC A L SYSTEM C A L IB R A T IO N
10. Adjust Vertical Output Bias
Page 5-28
11. Adjust Vertical Shield Voltage
Page 5-29
12. Adjust Delay-Line Driver Centering
Page 5-29
13. Check BEAM F IN D Operation
Page 5-29
14. Check Channel
1 Variable Volts/
Division Balance
Page 5-29
15. Adjust
Channel
1
Gain
Switch
Balance
Page 5-30
16. Check Probe Indicator Lights
Page 5-30
17. Check AC-GND-DC Switches
Page 5-30
18. Adjust Channel 1 Position Centering
Page 5-31
19. Adjust Channel 2 Variable Volts/
Division Balance
Page 5-31
20. Adjust
Channel
2
Gain
Switch
Balance
Page 5-31
21. Check Channel 2 IN V E R T Balance
Page 5-31
22. Adjust Channel 2 Position Centering
Page 5-32
23. Adjust Channel 1 Gain
Page 5-32
24. Adjust Channel 2 Gain
Page 5-33
25. Check Channel
1 and 2 Variable
Volts/Division Ranges
Page 5-33
26. Check ADD Mode Operation
Page 5-34
27. Check Compression and Expansion
Page 5-34
28. Check A L T Mode Operation
Page 5-34
29. Check CHOP Mode Operation
Page 5-34
30. Adjust Vertical Output Amplifier
High-Frequency Response
Page 5-34
31. Adjust High-Frequency Compensa
tion
Page 5-35
32. Adjust Channel 2 V O L T S /D IV Com
pensation
Page 5-36
33. Adjust Channel 1 V O L T S /D IV Com
pensation
Page 5-37
34. Check Vertical Amplifier Bandwidth
Page 5-38
35. Check Cascaded Bandwidth
Page 5-38
36. Check Vertical Channel Isolation
Page 5-39
37. Check Bandwidth Lim it Operation
Page 5-39
T R IG G E R SYSTEM C A L IB R A T IO N
38. Adjust A Trigger Sensitivity
Page 5-40
39. Adjust B Trigger Sensitivity
Page 5-40
40. Adjust
B Trigger
Centering
and
Symmetry
Page 5-41
41. Adjust
A Trigger
Centering and
Symmetry
Page 5-41
®
5-23
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: ......
Page 237: ......
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 ...