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3
Features and Functions
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
– Front-Panel Operation: After enabling FM, press the Source softkey.
– Remote Interface Operation:
98
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
FM:SOURce {INTernal|EXTernal}
+5 V
0 V
-5 V
Keysight 33210A User's Guide
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