Agilent Technologies Signal Analyzer N9030a - Manual (Page 288)

5 Legacy Command Descriptions
ERR (Error)
X-Series Error Code Description 8560 Series Error Code Description
521 External Ref missing or out of range 905,333 EXT REF: Unable to
lock cal oscillator
when set to external
reference. Check that
the external reference
is within tolerance.
600 UNLK: 600 MHz
reference oscillator
PLL is unlocked
Format ERR?
Query Data Type 0 if no error present.
3-digit number if error present. For valid codes, see table above.
SCPI Equivalent Commands None
Preset Remote error list cleared. Persistent errors are re-entered into the error list.
288 Remote Language Compatibility Measurement Application Reference