76
Chapter 3 Features and Functions
Amplitude Modulation (AM)
3
Modulating Source
The function generator will accept an internal or external modulation
source for AM.
• Modulating source: Internal or External. The default is Internal.
•
If you select the External source, the carrier waveform is modulated
with an external waveform. The modulation depth is controlled by the
±5V signal level present on the rear-panel Modulation In connector.
For example, if you have set the modulation depth to 100%
, then
when the modulating signal is at +5 volts, the output will be at the
maximum
amplitude. When the modulating signal is at -5 volts, then
the output will be at the
minimum
amplitude.
•
Front-Panel Operation
: After enabling AM, press the
Source
softkey.
•
Remote Interface Operation
:
AM:SOURce {INTernal|EXTernal}
Modulation
In
+5 V
0V
-5 V
33210A users guide.book Page 76 Wednesday, July 16, 2008 11:16 AM
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