Service Guide N5227-90001 4-25
PNA Series Microwave Network Analyzers Troubleshooting
N5227A Measurement System Troubleshooting
Figure 4-6 EEPROM Header Info Dialog Window
Error Messages
SOURCE UNLEVELED: The source ALC circuit on the A23 test set motherboard is running open-loop. Check
the cable connections for the A25 HMA26.5 and the A23 test set motherboard.
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