Features and Function
HDG2000 Series Arbitrary Waveform Generator 39
modulation mode.
You cannot enable FSK when sweep or burst is enabled. Enabling FSK turns off sweep and
burst.
To avoid multiple waveform changes, enable modulation after configuring the other modulation
parameters.
FSK Carrier Frequency
SOURce<n>:FREQuency<frequency>|MINimum|MAXimum
When the External source is selected, the output frequency is determined by the signal level on
the front-panel TRIG connector. When a logic low is present, the carrier frequency is output.
With a logic high level, the hop frequency is output.
FSK "Hop" Frequency
SOURce<n>:MOD:FSKey:FREQuency <frequency>|MINimum|MAXimum
The maximum alternate ("hop") frequency depends on the function. The default is 100 Hz for all
functions. The internal modulating waveform is a 50% duty cycle square wave.
Sine: 1 μHz to the highest frequency
Square: 1 μHz to the highest frequency
Ramp: 1 μHz to the highest frequency
Arb: 1 μHz to the highest frequency (except DC)
FSK Rate
SOURce<n>:MOD:FSKey:INTernal:RATE <frequency>|MINimum|MAXimum
The FSK rate is the rate at which the output frequency "shifts" between the carrier frequency and
the hop frequency using the internal FSK source.
FSK rate (internal source): 2MHz to 1 MHz, default 100 Hz.
The FSK rate is ignored when the external FSK source is selected.
FSK Source
SOURce<n>:MOD:FSKey:SOURce INTernal|EXTernal
May be internal (default), external or external trig modulation.
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.
When the External source is selected, the output frequency is determined by the signal level on
the front-panel MOD connector.
When the External Trig source is selected, the output frequency is determined by the signal
level on the front-panel TRIG connector. When a logic low is present, the carrier frequency is
output. With a logic high level, the hop frequency is output.
Front Panel:
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