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3
Troubleshooting
Introduction
This chapter describes troubleshooting procedures to determine a faulty assembly of the
E4915A/E4916A.
1. Check the System Failure
A system failure can be caused by a problem in the E4915A/E4916A and its accessories or
out of the E4915A/E4916A (in a peripheral or programming). To verify the operation of the
E4915A/E4916A alone, perform the following procedure.
1. Disconnect everything from the E4915A/E4916A: All test xtures, GPIB cable, and RF
cables.
2. Perform the 2. Inspect the Power On Sequence in this chapter.
3. Perform the 3. Troubleshoot the Power Supply in this chapter.
4. Perform the 4. Troubleshoot the Fan in this chapter.
5. Perform the 5. Perform the Self Test in this chapter.
6. Perform the 6. Inspect the Adjustment/Performance Test Results in this chapter.
7. Perform the 7. Inspect the Rear Panel Feature in this chapter.
If the E4915A/E4916A has passed all of the checks in steps 2 through 7 but it still making
incorrect measurements or unexpected operations, suspect the accessories. Accessories such as
PI Test Fixture or Impedance Probe, calibration devices, can all induce system problems.
Troubleshooting 3-1
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