Agilent Technologies Agilent 33500 Series Operating And Service Manual page 208

FSKey Subsystem
The FSKey subsystem configures a frequency-shift keying (FSK) waveform.
Example
This summarizes the steps required to generate an FSK waveform.
1. Use FUNCtion, FREQuency, VOLTage, and VOLTage:OFFSet commands to select the function, frequency, ampli-
tude, and offset of the carrier waveform.
2. Select modulation source (internal, external, CH1, or CH2):FSK:SOURce. For an external modulation
source, skip steps 3 and 4.
3. Select alternate ("hop") frequency:
4. Set FSK rate: FSK:INTernal:RATE
5. Enable FSK Modulation:
[SOURce[1|2]:]FSKey:FREQuency {< frequency >|MINimum|MAXimum}
[SOURce[1|2]:]FSKey:FREQuency? [{MINimum|MAXimum}]
Sets the FSK alternate (or "hop") frequency.
1 μHz to maximum instrument frequency (200 kHz limit for ramps), default 100 Hz
Set hop frequency to 10 kHz:
FSK:FREQ 10000
Set hop frequency to 1 μHz:
FSK:FREQ MIN
[SOURce[1|2]:]FSKey:INTernal:RATE {< rate_in_Hz >|MINimum|MAXimum}
[SOURce[1|2]:]FSKey:INTernal:RATE? [{MINimum|MAXimum}]
Sets the rate at which output frequency "shifts" between the carrier and hop frequency.
Parameter
1 mHz to 1 MHz, default 100 Hz
Set FSK rate to 10 kHz:
FSK:INT:RATE 10000
Set FSK rate to 1 mHz:
FSK:INT:RATE MIN
The FSK rate is used only with the internal source
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The modulating waveform is a square wave with a 50% duty cycle.
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Agilent 33500 Series Operating and Service Guide
FSK:FREQuency
FSK:STATe ON
Parameter
Typical Return
+1.000000000000000E-03
(FSK:SOURce
+1.000000000000000E-06
INTernal).
FSKey Subsystem
Typical Return
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