User's Manual

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Unlike the spectrum display window inside the Demodulator panel, which is
real-time and narrow band, the Spectrum Scope is wide-band and the graph
is created by fast tuning the receiver across the specified frequency range.
To set up spectrum sweeping, enter the Start and End frequencies, to
specify the start and end of the sweeping range, respectively. Next specify
the frequency step.
Spectrum Scope
The sweeping is controlled using a set of buttons similar to a tape recorder:
The
Start
button (with a triangle) starts sweeping. The
Stop
button (with a
square), stops sweeping, while the
Pause
button pauses it. The button with
a red round arrow selects continuous sweeping, which means that the
sweep will continue from the start frequency when the end frequency is
reached, and continue in this loop until manually stopped.
The
Min
,
Man
and
Diff
buttons enable the display of minimum, maximum
and differential values when continuous sweeping is selected. (A scale for
the differential trace will be displayed on the right-hand side whenever the
Diff
button is pressed.)
The differential trace is very useful when examining
long-term activity on a given band. The receiver can be left unattended in
the continuous sweeping mode, and any activity on the band will be clearly
visible on the differential trace.
There are also two
Zoom in/out
buttons performing their self-explanatory
functions, and a
Clear
button, which clears the graph and the min/max
values.
Clicking anywhere on the spectrum graph tunes the receiver to the
corresponding frequency. You can also drag the mouse horizontally across
the spectrum and continuously tune the receiver.
To hide the Spectrum Scope, use the yellow triangle button next to the
power switch again.