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Chapter 3 Features and Functions
Frequency Modulation (FM)
3
Modulating Source
The waveform generator will accept an internal or external modulation
source for FM.
• Modulating source: Internal (default), Other Channel, or External.
•
If you select the External source, the carrier waveform is modulated
with an external waveform. The frequency deviation is controlled by
the ±5 V signal level present on the rear-panel Modulation In
connector. For example, if you have set the deviation to 10 kHz,
then a +5 V signal level corresponds to a 10 kHz increase in frequency
.
Lower external signal levels produce less deviation and negative
signal levels reduce the frequency below the carrier frequency. The
external modulation input has -3 dB bandwidth of 100 kHz.
•
Front-Panel Operation
: After selecting FM, press the
Source
softkey.
•
Remote Interface Operation
:
FM:SOURce {INTernal|EXTernal|CH1|CH2}
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