Tektronix SPECMON3 Manual page 114

General Signal Viewing
Setting
Vertical (Time)
Normal
Spectrum Monitor
Time/update
Reset Scale
Autoscale
Time/div
Visible elapsed time
Position
Time at position
Horizontal (Frequency)
Scale
Position
Autoscale
xxx
Spectrum Monitor
Spectrum Monitor performs long term monitoring. The monitor mode compresses time into each line
of the spectrogram, which enables you to monitor long periods of time (from 1 second per line up to
600 minutes per line). With extended memory (Option 02) installed in the instrument, you can capture up
to 125,000 lines. With standard memory installed in the instrument, the maximum number of lines you
can capture is 31,250.
During each line's collection period, spectrum transforms are computed for each acquisition taken by the
instrument. As each transform completes, it is incorporated into the current spectrogram line. How each
102
Description
For most Spectrogram applications. Primary time scale control is Time/div. Time scale
can be zoomed in or out.
For long-term signal monitoring applications. In spectrum monitor mode, each line in the
spectrogram represents the period of time specified by the Time/update parameter. Time
scale can be zoomed out, but not zoomed in (no overlap).
Sets the time, in minutes and seconds, represented by each line of the spectrogram.
Only available in Spectrum Monitor.
Resets the Time/div and Pos settings to their default values.
Scales the vertical (time) axis to compress all existing trace lines into the visible area
of the graph. Resets the Position value to zero, placing the most recent spectrogram
line at the bottom of the spectrogram display. Only Position is affected by Autoscale
when Spectrum Monitor is selected.
Sets the time displayed per division.
Displays the length of time visible in the display. This does not represent the total time
available to view.
Adjusts vertical position of the trace within the graph area. Setting represents the offset,
in divisions, between the bottom of the graph and the bottom (most recent) line in the
results trace.
Displays the time of the spectrogram line shown at the bottom of the graph. This time is
relative to the Time Zero Reference of the current acquisition.
Sets the frequency range of the graph without changing the Span value.
Sets the frequency displayed at the center of the graph. Changing this value does not
change the Freq setting.
Sets the frequency scale to the Spectrogram Span value.
Time & Freq Scale Tab
SPECMON3 & SPECMON6 Printable Help