5.Panel Operation
42
OSK carrier wave can only be sine wave. Press
to set the carrier wave
shap.
(2)
Press the
Mod
function key, then press the
Type
softkey, turn the
knob
to select
OSK
, press the
OK
softkey.
Note: If
Sine
wave has not been selected,
OSK
in the menu is unavailable.
(3)
Set carrier wave parameters
:
Press
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
:
OSK uses internal modulation source, and the modulating wave is set as a
Square with 50% duty cycle.
(5)
Set OSK rate
:
Press the
OSK Rate
softkey to set the OSK rate. The intermittence time and
oscillate time of the output signal is determined by OSK rate (for internal
source). The range is 2 mHz – 1 MHz.
(6)
Set oscillate time
:
Oscillate time is the oscillation period of internal crystal oscillator. The settable
range of the oscillate period is related to the OSK rate currently selected. Press
the
Osc Time
softkey to set the oscillate time. The range is 8ns - 249.75s.
SUM (Sum Modulation)
The modulated waveform consists of the carrier wave and the modulating wave. For
SUM, the amplitude of the carrier wave varies with the instantaneous voltage of the
modulating wave. The SUM user interface is shown below.
Modulating wave
Carrier wave
Parameter 1
Parameter 2
Parameter 3
Load
Mod
Type Source
Figure 5-24: SUM user interface
