Keysight Technologies N5290/1A PNA Series Service Manual page 100

N5290/91A Troubleshooting
N5292A Test Controller Troubleshooting
Figure 4-5 Test Set Head DC Volts (e.g., is for port 3
(i.e., Other ports Port 1 (A), Port 2 (B), and Port 4 (D), are similar).
4-14 Keysight N5290/1A Service Guide