Keysight N1911A

10 Maintenance
272 Keysight N1911A/1912A User’s Guide
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231
Data questionable;Input Overload ChA
The power input to Channel A exceeds the power sensor’s maximum range.
–231
Data questionable;Input Overload ChB
The power input to Channel B exceeds the power sensor’s maximum range.
–231
Data questionable;Lower window log error
This indicates that a difference measurement in the lower window has given a negative result when the units
of measurement were logarithmic.
–231
Data questionable;Upper window log error
This indicates that a difference measurement in the upper window has given a negative result when the units
of measurement were logarithmic.
–231
Data questionable;ZERO ERROR
Power meter zeroing failed. The most likely cause is attempting to zero when some power signal is being
applied to the power sensor.
–231
Data questionable;ZERO ERROR ChA
Power meter zeroing failed on Channel A. The most likely cause is attempting to zero when some power signal
is being applied to the power sensor.
–231
Data questionable;ZERO ERROR ChB
Power meter zeroing failed on Channel B. The most likely cause is attempting to zero when some power signal
is being applied to the power sensor.
–241
Hardware missing
The power meter is unable to execute the command because either no power sensor is connected or it
expects an E-series power sensor and one is not connected.
–310
System error;Dty Cyc may impair accuracy with ECP sensor
This indicates that the sensor connected is for use with CW signals only.
–310
System error;Ch A Dty Cyc may impair accuracy with ECP sensor
This indicates that the sensor connected to Channel A is for use with CW signals only.
–310
System error;Ch B Dty Cyc may impair accuracy with ECP sensor
This indicates that the sensor connected to Channel B is for use with CW signals only.
–310
System error;Sensor EEPROM Read Failed - critical data not found or unreadable
This indicates a failure with your E-Series or N8480 Series power sensor. Refer to your power sensor manual
for details on returning it for repair.
–310
System error;Sensor EEPROM Read Completed OK but optional data block(s) not found or unreadable
This indicates a failure with your E-Series or N8480 Series power sensor. Refer to your power sensor manual
for details on returning it for repair.