Demodulating An Am Signal - Keysight N9030A Measurement Manual

Demodulating an AM Signal

This section demonstrates how to demodulate and listen to an AM signal. You can
tune to an AM signal and view the results of the detector output displayed in the
quad-view window or in 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 680 kHz signal with AM depth of 50% and AM rate of 1
kHz. Note that if you are using a broadcast AM signal in the United States, for
example, the AM channels are broadcasting between 550 kHz and 1650 kHz.
Step
1 Select Analog Demod mode.
2 Preset the mode.
3 Select AM measurement.
4 Set the center frequency of
the AM signal.
5 Adjust the sweep time and
view the measurement
results as in the figure
below.
6 Listen to the demodulated
AM signal.
Demodulating AM, FM, ΦM, FM Stereo/RDS Signals
Action
Press Mode, Analog Demod.
Press Mode Preset.
Press Meas, AM.
Press FREQ Channel, Center
Freq, 680, kHz.
Press Sweep/Control, Demod
Wfm Sweep Time, 2, ms.
Press Meas Setup, Demod to
Speaker.
11
Demodulating an AM Signal
Notes
You may need to adjust the volume
as necessary.