26 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Self–Test Failures and Related Troubleshooting
410 Burst Modulation Test
411 (not used)
412 HET Band Test
A9 YIG Driver “Self–Tests 6xx: A9 YIG Driver Self–Test Errors” on page 64
600 Post Regulator
601 DACs
602 PLL Interface
603 FM Driver
604 Sweep DACs
605 Sweep Lock
A6 Frac–N “Self–Tests 7xx: A6 Frac–N Self–Test Errors” on page 67
700 Ref Voltage
701 Loop Gain
702 Tuning Voltage
703 Output Voltage
704 Filter Test
705 F/2 Test
706 FM Path Test
707 Sweep Phase Detector Test
A45 Frac-N “Self–Tests 7xx: A45 Frac–N Self–Test Errors (option UNY)” on
page 70
720 Ref Voltage
721 1 GHz Input
722 Open Loop VCO
723 Open Loop F/2
724 Close Loop VCO
725 Low Band Filter
A10 ALC “Self–Tests 9xx: A10 ALC Self–Test Errors” on page 71
900 Power Supply
901 Detector Test
902 Detector Level to ALC Ref
903 Level Test
904 Scalar Pulse Test
905 ALC Mod
906 Scan Mod Test
A7 Reference (Option UNR/UNX) “Self–Tests 10xx: A7 Reference (Option UNR/UNX and Instruments
with Serial Prefixes ≥ US4805/MY4805) Self–Test Errors” on
page 74
1000 Power Supply
1001 10 MHz Test
1002 1 GHz Test
Table 1-4 Self–test Failures and Related Troubleshooting (Continued)
If this self–test fails... Go to this troubleshooting section...
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