Tektronix 475 User Manual

PART III—CALIBRATION
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 CHECK— is within the
allowable tolerance.
Outline to Part III—Calibration
POWER SUPPLY CALIBRATION
1. Check Power Supply DC Levels and
Ripple
Page 5-25
2. Check High Voltage Power Supply Page 5-26
DISPLAY and Z-AXIS CALIBRATION
3. Adjust CRT Grid Bias
Page 5-26
4. Check ASTIG 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
VERTICAL SYSTEM CALIBRATION
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 FIND 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 INVERT 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 ALT 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 VOLTS/DIV Com
pensation
Page 5-36
33. Adjust Channel 1 VOLTS/DIV 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 Limit Operation
Page 5-39
TRIGGER SYSTEM CALIBRATION
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

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English