User`s guide

138 Chapter 5
Analog Modulation
Configuring AM (Option UNT)
Configuring AM (Option UNT)
In this example, you will learn how to generate an amplitude- modulated RF carrier.
To Set the Carrier Frequency
1. Press Preset.
2. Press
Frequency > 1340 > kHz.
To Set the RF Output Amplitude
Press Amplitude > 0 > dBm.
To Set the AM Depth and Rate
1. Press the AM hardkey.
2. Press
AM Depth > 90 > %.
3. Press
AM Rate > 10 > kHz.
The signal generator is now configured to output a 0 dBm, amplitude- modulated carrier at 1340 kHz
with the AM depth set to 90% and the AM rate set to 10 kHz. The shape of the waveform is a sine
wave. Notice that sine is the default selection for the
AM Waveform softkey, which can be viewed by
pressing (More 1 of 2).
To Turn on Amplitude Modulation
Follow these remaining steps to output the amplitude- modulated signal.
1. Press the
AM Off On softkey to On.
2. Press the front panel
RF On Off key.
The AM and RF ON annunciators are now displayed. This indicates that you have enabled amplitude
modulation and the signal is now being transmitted from the RF OUTPUT connector.
Configuring FM (Option UNT)
In this example, you will learn how to create a frequency- modulated RF carrier.
To Set the RF Output Frequency
1. Press Preset.
2. Press
Frequency > 1 > GHz.
To Set the RF Output Amplitude
Press Amplitude > 0 > dBm.