Keysight E8257D/67D - Self-Tests 24 Xx: A38 Lowband Filter Self-Test Errors

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-59
• If the signal is not present or at the correct level, replace the Frac–N.
• If the signal is present, replace the A8 Output.
WARNING Do not re–install the A8 Output with the signal generator powered on. This can cause serious
damage to the signal generator.
2202 Switching Filter Test
• Replace the A8 Output.
2203 ALC Mod System Test
• Replace the A8 Output.
2204 Pulse Mod System Test
• Replace the A8 Output.
2205 RF Path Test
• Replace the A8 Output.
2206 Het Band Test
• Replace the A8 Output.
Self–Tests 24xx: A38 Lowband Filter Self–Test Errors
Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of
specification troubleshoot the supply problem first.
Supply Voltage
(Vdc)
Connector Pins Minimum Value
(Vdc)
Maximum Value
(Vdc)
Origin
+32 P142–4 +31.04 +32.96 Main Supply
+15 P142–28 +14.55 +15.45 Main Supply
–15 P142–3 –15.45 –14.55 Main Supply