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Amplitude
Modulation
Operating
Modes
The signal generator has two AM operating
modes—Linear AM and Log AM. In Linear AM
mode, sensitivity is continuously variable from
0 %/V to 100 %/V. The amplitude of the RF output
changes linearly as the AM input changes.
In Log AM mode, sensitivity is continuously variable
from 0 dB/V to 25 dB/V. The amplitude of the RF
output changes exponentially as the AM input
changes.
Providing
Amplitude
Modulation
The following are the menu selections to provide
amplitude modulation of the output signal using a
modulating signal from both the internal AM gener
-
ator and an external source.
Press MODULATION . At the resulting main modu
-
lation menu display, press AM . The AM Status
menu (below) is displayed.
This menu lets you perform the following:
q
Turn the selected AM mode On or Off
q
Edit the AM Depth and Rate
q
Select the AM Waveform
q
Select the modulating signal source
q
Select the Linear AM or Log AM operating
mode
Internal AM Source
Press Internal / External to select the internal AM
generator as the modulating signal source.
Press On/Off to turn AM on and off. The Internal
AM status display will reflect your selection as On
or Off; the AM modulation status area will reflect
your selection as Internal On or Off.
MG369XB OM 3-93
Local (Front Panel) Operation Signal Modulation