Calibration
6–40
1502C MTDR Service Manual
NOTE. Some changes in shape of the baseline before the leading edge is normal. If
this measurement is difficult to make, access the Service Diagnostic Menu and
change the timebase mode from Timebase is:Normal – Auto Correction to Timebase
is: Diagnostic – No Correction. This will give more stability to the pulse when the
cable is connected.
12. Turn the instrument off.
13. Replace the Driver/Sampler EMI shield. Be sure the ribbon cable is placed in
the center slot of the shield so it won’t be crushed by the shield.
After Adjustments are Completed
1. If the instrument is Option 05 (metric), refer to the Maintenance chapter to
return the metric default jumper to its proper position.
2. Reinstall the 1502C in its case (refer to the Maintenance chapter of this manual).
Care should be taken to follow the directions to maintain watertight integrity
of the case.
3. Turn back to the Calibration section of this chapter and perform all those
Performance Checks that did not require case-off adjustments.
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