Fm Display - Tektronix SPECMON3 Manual

Analog Modulation
Prefs Tab
The Prefs tab enables you to change appearance characteristics of the AM display.
Setting
Show graticule
Show Marker readout in graph
(selected marker)
Max trace points
xxx

FM Display

The Frequency Modulation Display shows Frequency Deviation vs. Time. The vertical axis units are
Hertz and the horizontal axis units are seconds. When taking measurements, only the first burst in the
Analysis period is analyzed. No trace points are shown for data outside the first detected burst, nor are
measurements made on data outside the first detected burst.
To show the FM display:
1. Select the Displays button or select Setup > Displays. This shows the Select Displays dialog box.
2. From the Folders box, select Analog Modulation.
3. Double-click the FM icon in the Available Displays box. This adds the FM icon to the Selected
displays box.
4. Click the OK button. This shows the FM display.
132
Description
Shows or hides the graticule.
Shows or hides the readout for the selected marker in the graph area.
The trace in the AM display can be set to a maximum of 100,000 points (however, the
actual number of trace points can extend up to 500,000 points if Max trace points is
set to Never Decimate). If the Analysis Length includes more than the selected Max
trace points value, the trace is decimated (using the method specified with the Detection
control) to be equal to or less than the Max trace points setting (except when Max trace
points is set to Never Decimate). This decimated (or undecimated) trace is what is used
for marker measurements and for results export.
SPECMON3 & SPECMON6 Printable Help
Prefs Tab