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 Mode 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.
4FSK (4 Frequency Shift Keying)
4 Frequency Shift Keying modulation is a modulation technique that shifts the
output signal frequency among four preset frequencies: the carrier frequency
and three hop frequencies. The shift frequency (4FSK rate) is determined by
the internal signal level of the instrument. The 4FSK user interface is shown
below.
Figure 5-23: 4FSK user interface
How to set the parameters of 4FSK
(1) Press the Mode function key, press the NextPage softkey twice more,
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