Keysight Technologies N9030B, Руководство по обслуживанию

Страница: 89 / 617

N9030B PXA Signal Analyzer Service Guide 89
Instrument Messages
Advisory Messages
Cal Cancelled; Calibration
data cleared
User has cancelled the cal either directly or indirectly by changing the
setup parameters. The current cal data has been erased. Perform a new
user cal to obtain calibrated results again.
Cal Invalid: meas freq pt(s)
> 3.6GHz are > 50MHz from
existing Cal pts
When freq points being measured are above 3.6 GHz and a calibration has
been successfully performed, and the number of points are changed, the
new points are required to be within 50 MHz of the current cal points or
the preselector optimize frequencies become inaccurate and the whole cal
needs to be invalidated. Interpolation of the cal can only be performed if
the new freq points are within 50 MHz of the cal points. To overcome this
problem, change the number of freq points back to match cal points or
perform another user cal.
Carrier power is too low for
optimum dynamic range.
For better dynamic range, transmit band spur measurements require >10
dBm signal power at the RF input port.
Connecting to source…
External Signal Generator is being sent SCPI commands interrogating it to
see if it is suitable for the PXA to control. Please wait until complete before
pressing any buttons.
Demod Time is not available
in Zero Span
The Demod Time function is not available in zero span because in zero
span we are ALWAYS demodulating.
Detector <X> changed due to
physical constraints
You have selected more detectors than the instrument hardware can
implement. An existing detector selection has been changed to allow the
current detector choice to be selected.
<X> indicates the trace number for which the detector was changed.
Dynamic range is not optimum.
Set AUTO RF input.
Exp. Averaging not available
when AUTO PhNoise is active.
FFT Width is not settable
unless Sweep Type is set to
FFT
You must select the FFT sweep type before you can set the FFT Width
File <filename> saved
The file save operation executed successfully.
Filter BW function is only
available for Gaussian filter
type
Flattop and CISPR/MIL filters have defined shapes that cannot be altered.
So only the Gaussian filter type allows filter bandwidth definition changes.
Fixed LO freq should be
greater than RF Stop freq
The setup frequencies break the rules for a downconverter measurement.
The measurement will still run, but check setup frequencies are correct
before continuing. The LO fixed freq should be greater than the RF freq’s
for an LSB or DSB (for DSB measurements the setup uses LSB values)
downconverter setup. Use the graph icon on the DUT setup form to clarify
the setup required.
Freq Scale Type=Log is not
available in Zero Span
Logarithmic scaling cannot be used for time domain sweeps
(0 Hz span).
Message Description/Correction Information