3 Functions and Measurements
70 N9342C/43C/44C User’s Guide
FSK Demodulation Analysis
Please refer to the procedures below to analysis
the ASK modulation.
1 Connect the signal generator to RF IN connector
and turn on the signal generator’s FSK and RF
output.
2 Turn on the ASK demodulation analysis function.
Press [MODE], {Modulation Analysis}, {FSK}.
3 Press [Freq] > [100] > {MHz} to set the carrier
frequency.
4 Press [Meas] > {Symbol Rate} > [10] > {ksps} to set
the symbol rate.
5 Press {Filter Setup} > {Ref Filter} > {Nyquist} > {Return}
to set the filter type.
6 Set the attenuation state to Auto (default):
Press [Amptd] > {Attenuation Auto}
7 Press [Disp] > {Y Scale} > {Scaling Coupling On} to set
the Y scale auto coupling.
8 Setting the FSK deviation limit and turn on the
limit function:
Press [Limits] > {FreqDev UP} > [41] > {kHz} > {FreqDev
Low} > [39] > {kHz} > {Limits on}
Figure 3-28 FSK Modulation
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