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2.2 Modulation Waveform Setup
Press
to output modulated waveforms.
function signal generators can output
modulation waveforms of AM, FM, PM, ASK, FSK and PSK. Set different modulation
parameters according to different modulation types.
In amplitude modulation, internal modulation/external modulation, frequency, depth and
modulation waveforms can be set.
In frequency modulation, internal modulation/external modulation, frequency, frequency
deviation and modulation waveforms can be set.
In phase modulation, internal modulation/external modulation, frequency, phase deviation
and modulation waveforms can be set.
In ASK modulation, internal modulation/external modulation, frequency and modulation
amplitude can be set.
In FSK modulation, internal modulation/external modulation, frequency and
frequency-hopping can be set.
In PSK modulation, internal modulation/external modulation, frequency and modulation
phase can be set.
Settings of various modulation parameters will be introduced respectively in the following parts,
based on modulation types.
2.2.1 Amplitude Modulation (AM)
Modulated waveforms consist of carrier waves and modulation waveforms. In AM (Amplitude
Modulation), the amplitude of the carrier wave changes with the instantaneous voltage of the
modulation waveform.
The carrier wave for amplitude modulation can be set through the function keys
of
on the front panel.
Press
→ Type→ AM and enter the interface as shown in Figure 2-21.