Fsk Source - Agilent Technologies 33220A User Manual

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Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation

FSK Source

• FSK source: Internal or External. The default is Internal.
• When the Internal source is selected, the rate at which the output
frequency "shifts" between the carrier frequency and hop frequency
is determined by the FSK rate specified.
• When the External source is selected, the output frequency is
determined by the signal level on the rear-panel Trig In connector.
When a logic low level is present, the carrier frequency is output.
When a logic high level is present, the hop frequency is output.
• The maximum external FSK rate is 100 kHz.
• Note that the connector used for externally-controlled FSK waveforms
(Trig In) is not the same connector that is used for externally-
modulated AM, FM, PM, and PWM waveforms (Modulation In).
When used for FSK, the Trig In connector does not have adjustable
edge polarity.
• Front-Panel Operation: After enabling FSK, press the Source softkey.
• Remote Interface Operation:
FSKey:SOURce {INTernal|EXTernal}
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