MP7505 Series User Manual
Figure 5-19: 3FSK user interface
How to set the parameters of 3FSK
(1) Press the Mod function key, then press the Type softkey, turn the rotary control
to select 3FSK, 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) Modulating wave source:
3FSK uses internal modulation source, and the modulating wave is set as a
Square with 50% duty cycle.
(5) Set 3FSK rate:
Press the FSK Rate softkey to set the 3FSK rate. The rate at which the output
frequency shifts between the carrier frequency and the two hop frequencies is
determined by 3FSK rate (for internal source). The range is 2 mHz – 1 MHz.
(6) Set hop frequencies:
Press the HopFreq1 and HopFreq2 softkey to set the two hop frequencies.
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