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

102 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
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.
2802 ALC Mod System Test
— Replace the A8.
2803 Pulse Mod System Test
— Replace the A8.
2804 Clamp Detector Test
— Replace the A8.
2805 Bias Switch Test
— Replace the A8.