Agilent Technologies 33250A User Manual page 77

Modulating Source
The function generator will accept an internal or external modulation
source for FM.
• 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 frequency deviation is controlled by
the ±5V signal level present on the rear-panel Modulation In
connector. For example, if you have set the deviation to 100 kHz,
then a +5V signal level corresponds to a 100 kHz increase in frequency.
Lower external signal levels produce less deviation and negative
signal levels reduce the frequency below the carrier frequency.
Modulation
In
• Front-Panel Operation: After enabling FM, press the Source softkey.
• Remote Interface Operation:
FM:SOURce {INTernal|EXTernal}
Chapter 3 Features and Functions
Frequency Modulation (FM)
+5 V
0 V
-5 V
3
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