(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 ā 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.
Figure 5-27: SUM user interface
How to set the parameters of SUM
(1) Press the Mode function key,press the NextPage softkey three more
times,then press the SUM softkey to enter SUM user interface.
(2) Select carrier wave shape:
The carrier wave can be Sine, Square, or Ramp. Press , , or
to select a desired carrier wave shap.
(3) Set carrier wave parameters:
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