Keysight Technologies 34959A Service Manual page 82

4 Troubleshooting and Diagnostics
Error Description
305 "Not able to perform requested operation"
306 "Part of a 4-wire pair"
307 "Incorrectly configured ref channel"
308 "Channel not able to perform requested operation"
309 "Incorrectly formatted channel list"
310 "Operation refused because channel is locked open"
311 "Not able to specify resolution with Auto range"
501 "Isolator UART framing error"
502 "Isolator UART overrun error"
514 "Not allowed"
514 "Not allowed; Instrument locked by another I/O session"
521 "Communications: input buffer overflow"
521 "Input buffer overflow"
522 "Output buffer overflow"
522 "Communications: output buffer overflow"
531 "Insufficient memory"
532 "Cannot achieve requested resolution"
532 "Not able to achieve requested resolution"
540 "Cannot use overload as math reference"
540 "Not able to null channel in overload"
550 "Command not allowed in local"
550 "Not able to execute command in local mode"
551 "Unknown Dmm Inguard Error"
Self-Test Errors
These errors can indicate a hardware failure. The first two errors, 601 and 602, can
indicate a failure of the communications board. The remaining errors are typically
caused by a failure on the internal DMM.
82 Keysight 34980A Service Guide