Demodulating An Fm Signal - Keysight X-Series Measurement Manual

Demodulating AM, FM, ΦM, FM Stereo/RDS Signals

Demodulating an FM Signal

Demodulating an FM Signal
This section demonstrates how to demodulate and listen to an FM signal. You
can tune to an FM signal and view the results of the detector output displayed
in the quad-view window or single-window format.
Alternatively, the demodulated signal is also available as an audio output (to
the speaker or headphone jack) and as video output (on the rear panel).
The signal under test is a signal at 300 MHz with FM deviation of 10 kHz and
FM rate of 1 kHz. Note that if you are using a broadcast FM signal in the United
States, for example, the FM channels are broadcasting between 87.7 MHz and
107.7 MHz.
Step
1. Select Analog Demod mode.
2. Preset the mode.
3. Select FM measurement.
4. Set the center frequency to
the center of the FM signal.
5. Adjust the sweep time and
view the measurement
result as in the figure below.
Keysight N9063C Analog Demod Measurement Guide
Action
Mode/ Meas
— Press ,
Demod
.
Mode Preset
— Press .
Mode/ Meas
— Press ,
Center Freq
— Tap and enter
300 MHz
, .
Sweep Demod Wfm
— Press ,
Sweep Time 2 ms
, ,
Notes
Analog
FM, OK
The Quad view is the default setting.
.
This is the default setting.
.
11