7 Save/Recall/Print
7.3 Save
NOTE
The resolution of the absolute time stored is 1 ms, to match the fastest sweep
time, which is also 1 ms. However, there is no specification for the absolute
accuracy of the clock in the instrument, nor is there any way to set this time to
any particular degree of accuracy.
Traces that have not yet been filled in the Spectrogram display are empty; there is
no DATA header for them. The file ends after the last non-empty trace.
Suppose that, at the point where a Spectrogram Meas Result is requested, the
following screen is showing:
For the purpose of this example, we have set Average/Hold Number to 10, thus we
have only traces 0 thru 10. The Spectrogram was started at 02:28:08:700 pm on
April 25, 2012 (that is, 700 ms after 2:28:08 pm), although the screen dump itself
shows a different time, as it was taken ten minutes after the Spectrogram data.
Trace 0 is showing a start time of 5.30 seconds, meaning 5.3 seconds after the
Spectrogram started (trace 10 has a start time of 0, as it was the first trace taken but
has now rolled up into the tenth trace slot).
The Meas Results file, when opened, shows the header data and ten traces of trace
data. Below is an extract from the result file for the above display. Note the start
Spectrum Analyzer Mode User's &Programmer's Reference 2578
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