5.Panel Operation
30
Frequency deviation is the deviation of the modulating wave frequency relative
to the carrier wave frequency. Press the
Deviation
softkey to set the FM
frequency deviation. Frequency deviation range: 2 mHz ≤ deviation < upper limit
(upper limit is
carrier frequency
or
carrier maximum frequency minus carrier
frequency
, the smaller of the two).
PM (Phase Modulation)
The modulated waveform consists of the carrier wave and the modulating wave. For
PM, the phase of the carrier wave varies with the instantaneous voltage of the
modulating wave. The PM user interface is shown below.
Figure 5-14: PM user interface
How to set the parameters of PM
(1)
Press the
Mod
function key, then press the
Type
softkey, turn the
knob
to select
PM
, press the
OK
softkey.
(2)
Select carrier wave shape
:
The carrier wave can be
Sine
,
Square
,
Ramp
, or
Arbitrary
wave (except DC).
Press
,
,
, or
to select a desired carrier wave shap.
(3)
Set carrier wave parameters
:
Press
the wave shap key
of the selected carrier wave to display the waveform
and parameters of the carrier wave. You can change the parameters of the
carrier wave. Press
Mod
to return to the modulation mode interface.
(4)
Select modulating wave source
:
