Self-Tests 4Xx: A8 Output Self-Test Errors - Agilent Technologies PSG Series Service Manual

Self-Tests 4xx: A8 Output Self-Test Errors

Figure 1-4
Before proceeding to the reported self-test error code, check the voltages in Table1-19. If any
voltages are out of specification troubleshoot the supply problem first.
Table 1-19
Supply
Voltage
(Vdc)
400 Ground and PTAT Test
1. Replace A8 Output.
401 Prelevel Loop Test
1. With the signal generator powered up carefully remove the A8 Output. Set the signal generator to 3 GHz
CW. Connect a spectrum analyzer to the A6 Frac-N RF output at J4 of the A8 Output. The signal at J4
Connector
Pins
+15 P52-6, 21
-15 P52-2, 17
+5.2 P52-14, 29
+9 P52-5, 20
-6 P52-3, 18
Troubleshooting Assembly Level Problems
Minimum Maximum
Value Value
(Vdc) (Vdc)
+14.55 +15.45
-14.55 -15.45
+5.04 +5.36
+8.82 +9.18
-5.88 -6.12
Troubleshooting
Origin
Main Supply
Main Supply
Main Supply
YIG Driver
YIG Driver
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