140
Demodulating AM Signals
Measuring the Modulation Rate of an AM Signal
Measuring the Modulation Rate of an AM Signal
This section demonstrates how to determine parameters of an AM signal, such as
modulation rate and modulation index (depth) by using frequency and time domain
measurements (see the concepts chapter “AM and FM Demodulation Concepts” on
page 215 for more information).
To obtain an AM signal, you can either connect a source transmitting an AM signal,
or connect an antenna to the analyzer input and tune to a commercial AM broadcast
station. For this demonstration an RF source is used to generate an AM signal.
Step Action Notes
1 Set up the signal
source.
a. Set the source frequency to
300 MHz.
b. Set the source amplitudes to
−10 dBm.
c. Set the AM depth to 80%.
d. Set the AM rate to 1 kHz.
e. Turn AM on.
2 Connect an Keysight
ESG RF signal source
to the analyzer RF
INPUT as shown.
3 Select the mode. • Press Mode, Spectrum
Analyzer.
4 Preset the analyzer. • Press Mode Preset.
To Next Page
Loading...
Need help?
General
