Tektronix RSA6100A Series, Help Manual

Page: 129 / 415

Analog Modulation > FM FM Display
Item Element Description
1
Check mark indicator The check mark indicator in the upper, left-hand corner of the display shows
when the FM display is the optimized display.
2 Top of Graph control Sets the frequency indicated at the top of the graph. Since the Position value
at the vertical center of this graph remains constant as the Top of Graph value
is adjusted, the Vertical Scale increases as the Top of Graph value increases,
which also affects the bottom of graph readout. Vertical Scale can also be
controlled from the Settings control panel’s Scale tab.
3 Position Speci fi es the frequency shown at the center of the graph display. Changing
this value moves the trace up and down in the graph, which affects the Top of
Graph and Bottom of Graph values as well.
4 Bottom of Graph Readout Displays the frequency value at the bottom of the graph.
5 Measurement readouts Displays numeric values for the +Pk (positive frequency deviation), –Pk
(negative frequency deviation), RMS (RMS value of the deviation), Pk-Pk
(peak-to-peak frequency deviation), and Pk-Pk/2 (peak-to-peak frequency
deviation divided by two).
6 Position Speci fi es the horizontal position of the trace on the graph display.
7
Scale Adjusts the time range of the graph. By decreasing the scale (full-scale time
over 10 divisions), the graph essentially becomes a window that you can
move over the acquisition record by adjusting the horizontal position.
8 Clear Clears the trace and numeric measurement results.
9 Trace Detection readout Displays the Settings > Trace > Detection setting.
10 Freq Error This readout can show Freq Error or Freq Offset. When it displays Freq
Error, it shows the difference between the instrument Frequency setting and
the measured value of the signal’s carrier frequency. When it displays Freq
Offset, it shows the frequency offset speci
fi ed on the Settings > Parameters
tab. If Freq Error is displayed, it also indicates that the Carrier frequency
detection setting is Auto. If Freq Offset is displayed, it indicates that the
Carrier frequency detection setting is manual.
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Changing the FM Settings (see page 118)
RSA6100A Series Real-Time Spectrum Analyzers Help
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