5
Error Messages
Instrument Errors
501 to 502
501: Cross-isolation UART framing error
502: Cross-isolation UART overrun error
These errors indicate an internal hardware failure. The isolation between chassis
ground circuits and floating circuits is controlled by an optical isolation barrier and
a serial link.
580
Reference phase-locked loop is unlocked
The PHAS:UNL:ERR:STAT has been enabled ("on") and the internal phase-locked
loop that controls the frequency is currently unlocked. This error is most likely to
occur when the external reference is out of lock range.
322
Keysight 33210A User's Guide