Keysight E8257D/67D - Self-Tests 27 Xx: A46 Offset Loop Self-Test Errors (Option UNY); Self-Tests 28 Xx: A8 Vector Output Self-Test Errors

E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
1-63
• 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.
2602 ALC Modulator Test
• Replace the A8 Output.
2603 Pulse Modulator Test
• Replace the A8 Output.
2604 Clamp Detector Test
• Replace the A8 Output.
2605 Bias Switch Test
• Replace the A8 Output.
2606 Switched Filters Test
• Replace the A8 Output.
2607 DAC Functionality Test
• Replace the A8 Output.
2608 Het Band Test
• Replace the A8 Output.
Self–Tests 27xx: A46 Offset Loop Self-Test Errors (Option UNY)
2700 Frac-N Signal Test
• Replace the A46.
2701 Offset VCO Test
• Replace the A46.
2702 Fstep OSL Test
• Replace the A46.
2703 Offset Loop Detector Test
• Replace the A46.
2704 Fcomb at YOL Test
• Replace the A46.
2705 YO Loop Detector Test
• Replace the A46.
Self–Tests 28xx: A8 Vector Output Self-Test Errors
2800 Power Supply Test
• Replace the A8.
2801 Prelevel Loop Test
• Replace the A8.