Keysight Technologies Option 503 Service Manual page 138

Instrument Messages
Condition Messages
Err# Status
Register
Bit
309 4
138
Message
User Cal; Cal invalidated
Error or Verbose/Correction Information
Warning
E,W The existing user cal has been invalidated
because of one of the following reasons:
Frequency: Setting the frequency outside
the current valid user cal set (for
example: If the current sweep range is 2
to 3GHz, then setting the start frequency
to 1.9 GHz will invalidate the current user
cal. Other frequency changes that will
invalidate the user cal are:
• If the cal was performed at a
fixed frequency and you change
this frequency.
• If you are in "Freq List" mode
and you change it to extend
beyond the current user cal
range. In this case you will see
an error message.
DUT Type: If the DUT Type parameter
changes, causing the measurement
frequencies to be pushed outside the
current cal.
Attenuation: If an attenuation setting is
selected but has not been calibrated.
Preamp: If set to condition different from
current cal settings, for example: if
calibrated with the preamp on, turning it
off will invalidate the cal.
Points: Changing the number of
measured frequency points can make the
stored preselector offsets become
inaccurate and hence invalidate the
calibration. This occurs when the
following conditions exist:
• A successful calibration has
been performed.
• Some measured freq points are
> 3.6 GHz.
• The new points > 3.6 GHz are
located more than 50 MHz
away from the current
calibration points.
N9030A PXA Signal Analyzer Service Guide