5.Panel Operation
34
low level. The situation is the opposite when the slope is set to
Negative
.
(6)
Set modulating amplitude
:
Press the
Amplitude
softkey to set the modulating amplitude.
FSK (Frequency Shift Keying)
Frequency Shift Keying modulation is a modulation technique that shifts the output
signal frequency between two frequencies: the carrier frequency and hop frequency.
The shift frequency (FSK rate) is determined by the internal signal level or signal level
offered by the
Mod/FSK/Trig
connector at the rear panel. The FSK user interface is
shown below.
Figure 5-17: FSK user interface
How to set the parameters of FSK
(1)
Press the
Mod
function key, then press the
Type
softkey, turn the
knob
to select
FSK
, 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
:
Press the
Source
softkey to select
Internal
or
External
as the modulating wave
