(5) Set the modulating phases:
Press the Phase1, Phase2 and Phase3 softkey to set the modulating
phases respectively. The range is 0° to 360°.
OSK (Oscillation Shift Keying)
Oscillation Shift Keying modulation is a modulation technique that the
generator to output a sine signal with intermittent oscillation. The
start-oscillation and stop-oscillation of the internal crystal oscillator are
controlled by the internal signal level of the instrument. When the internal
crystal oscillator starts to oscillate, the instrument starts to output the carrier
waveform and when the internal crystal stops oscillating, the output stops. The
OSK user interface is shown below.
Figure 5-26: OSK user interface
How to set the parameters of OSK
(1) Set carrier wave shape:
OSK carrier wave can only be sine wave. Press to set the carrier
wave shap.
(2) Press the Mode function key,press the NextPage softkey three more
times,then press the OSK softkey to enter OSK user interface.
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 Mode to return
to the modulation mode interface.
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