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The soft-keys present all of the modulation types which may be applied to the selected carrier waveform. If
PM is not already selected press the PM soft-key followed by the Done key to return to the top level
modulation menu.
To select the modulation source press the
Source soft-key. The options are Internal or
External. Internal will use the waveform specified in the shape parameter and the Graph Box
will show that shape as the modulating waveform. External will use the signal present at the MOD
IN connector and the
Freq and Shape soft-keys will disappear. The Graph Box will always
show a sinewave as the modulating waveform if the source is set to External.
To set the phase deviation press the
Deviatn soft-key. The deviation parameter will appear in the
Edit Box and the modulating waveform in the Graph Box will show that deviation is being edited.
The deviation may be changed in either of the ways detailed in General: Numeric Editing.
To set the modulation frequency press the
Freq soft-key. The frequency parameter will appear in
the Edit Box and the modulating waveform in the Graph Box will show that frequency is being
edited.
The frequency may be changed in either of the ways detailed in General: Numeric Editing.
To set the modulation shape press the
Shape soft-key. The currently selected shape will appear
in the Edit Box and the soft-keys will change to a list of shapes available.
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