GW Instek AFG-100/200 Series User Manual - Manual (Page 48)

AFG-125/225 Series Options Manual
48
SUM Modulation
Background The SUM Modulation function can set the SUM
amplitude (SUM Ampl) the carrier frequency
(SUM Freq) and carrier waveform (Shape).
In general SUM modulation adds a modulating
signal to a carrier wave. Typically, sum
modulation is used to add noise to a carrier wave.
The modulating signal is added as a percentage of
the carrier amplitude.
Steps 1. Set the carrier waveform and
frequency. You can set the carrier
waveform and frequency in the
Selecting a Basic Waveform section.
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2. From the first level of the AFG
menu, press the Signal 1 Setup or
Signal 2 Setup key to select the
signal source.
3. From the bottom menu press
MOD.
4. From the side menu turn MOD On,
press more 1 of 2 and then select the
SUM modulation.
Note
Only one modulation mode can be active at any one
time. The function generator also will not allow sweep,
burst or ARB mode to be used with a modulation
function. Activating a modulation mode will turn the
previous modulation mode off.