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HP 8517B S-Parameter Test Set Manual
Troubleshooting the Test Set
Troubleshooting Procedures
Figure 5-6 The ACTIVE LED Location
If the Self-Test Fails to Run Properly
If the portion of memory holding the self-test program is faulty, the self-test
will not run properly. If any of the following conditions occur, it indicates
thattheA4HP-IBboardislikelytobefaulty.
• All LEDs flash briefly, then turn off
• All LEDs flash briefly and stay on
• The ACTIVE LED turns on too quickly after power on
• The ACTIVE LED does not turn on at all