Trigger Sensitivity; Part Ii Calibration; Trigger Sensitivity (Sn B070000-Above); Trigger Sensitivity (Sn B069999-Below) - Tektronix 7B92A Maintenance Manual

The following procedure returns the 7B92A 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 Specification section of this manual. Where possible, instrument performance is
checked before an adjustment is made. When performing a complete Calibration procedure, make
each adjustment to the given setting, even if the Check- is within the allowable tolerance.
OUTLINE FOR
PART II--CALIBRATION
A. Trigger Sensitivity (SN B070000-above) Page
1. Preliminary Main Triggering Adjust-
ment
2. Adjust Main Triggering Internal DC
Balance
3. Adjust Main Triggering Sensitivity
4. Adjust External DC Balance
5. Check Main Triggering Level Range
6. Preliminary Delayed Triggering Adjust-
ment
7. Adjust Delayed Triggering Sensitivity
8. Adjust Delayed Triggering External DC
Balance
9. Check Delayed Triggering Level Range
10. Check Low-Frequency Triggering
11. Check AC LF Reject Operation
12. Check 20 MHz Triggering
13. Checkl80 MHz Triggering
14. Check HF Sync Triggering
15. Check Line Triggering
16. Check Single Sweep Operation
B.

Trigger Sensitivity (SN B069999-below)

1. Preliminary Main Triggering Adjust-
ment
PART II-CALIBRATION
2. Adjust Main Triggering Arming Tunnel
Diode Bias
3. Adjust Main Triggering Gate Tunnel
Diode Bias
5-18
4. Adjust Main Triggering Internal DC
Balance
5-18
5. Adjust Main Triggering Sensitivity
6. Adjust Main Triggering External DC
5-19
Balance
7. Check Main Triggering Level Range
5-19
8. Preliminary Delayed Triggering Adjust-
5-19
ment
9. Adjust Delayed Triggering Arming
Tunnel Diode Bias
5-20
10. Adjust Delayed Triggering Gate
5-20
Tunnel Diode Bias
11. Adjust Delayed Triggering Internal DC
Balance
5-20
12. Adjust Delayed Triggering Sensitivity
5-20
13. Adjust Delayed Triggering External DC
5-21
Balance
14. Check Delayed Triggering Level
5-22
Range
15. Check Low-Frequency Triggering
5-22
16. Check AC LF Reject Operation
5-23
17. Check 20 MHz Triggering
5-23
18. Checkl80 MHz Triggering
5-23
19. Check HF Sync Triggering
5-24
20. Check Line Triggering
21. Check Single Sweep Operation
5-25
5-16
Performance Check/Calibration-7B92A
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