Tektronix SPECMON3 Manual page 420

Reference
Insufficient data for CISPR. Acquire while display is selected
This message appears when a measurement is not the selected measurement and CISPR filters are selected.
Set the measurement to be the selected measurement and reacquire the signal.
IQ Processing Error: 8012
This message occurs in GP Digital Modulation displays. The most likely cause for this message is that
there are not enough symbols to analyze. This can happen if:
The Analysis Length is set too short. Increase the Analysis Length on the Analysis Time tab.
The Analysis Offset has pushed the Analysis Time so far out that the actual Analysis Length is too
short, even though the user-requested Analysis Length would have been long enough without the
excessive offset. Decrease the Analysis Offset on the Analysis Time tab.
The input signal is bursted, and the burst does not contain enough symbols.
Needs swept acq or larger Acq BW - Acquire data while display is selected
The display has one of two problems: It is not the selected display, which prevents it from controlling
the hardware acquisition parameters, and setting the acquisition mode to Swept; or its settings require a
wider data bandwidth.
Select the display that you are interested in and it will change the acquisition to meet its own needs.
Increase the acquisition bandwidth manually or by changing the selected display's settings to cause
the wider bandwidth.
No Math trace: unmatched trace lengths
A math trace could not produced because the traces selected to generate the math trace do not have
the same number of points. This can easily happen if both traces are recalled, but were saved under
different "Points" settings. This can also occur if one of the selected traces is a live trace and the other
trace is a recalled trace.
In a Spectrum display, as long as one trace is live, you can change the "Points" setting (Setup >
Settings > Freq & Span tab) to match the recalled trace.
If you are using two recalled traces to generate the Math trace. You must recreate at least one of
the traces.
No burst detected
The Burst Detection Mode (see page 319)
Check that the Threshold setting is properly set.
Not enough samples for current setup
The measurement was not able to run because the combination of analysis length, offset, and measurement
bandwidth relative to acquisition bandwidth, were such that not enough samples were available for the
measurement to analyze. This can occur when two or more displays are shown and one display requires
a wide acquisition bandwidth and another display requires a much narrower bandwidth. The display
requiring the much narrower bandwidth must decimate and filter the acquisition record which can result in
too few samples left for the measurement.
408
is On, but no burst was detected in the signal.
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