HP 33120A, User Manual

Page: 35 / 118

To output an FSK waveform
You can configure the function generator to “shift” its output frequency
between two preset values using
FSK
(frequency-shift keying) modulation.
The rate at which the output shifts between the two frequencies
(called the “carrier frequency” and the “hop frequency”) is determined by
the internal rate generator or the signal level on the rear-panel
FSK
terminal. For this example, you will set the “carrier” frequency to 3 kHz and
the “hop” frequency to 500 Hz, with an FSK rate of 100 Hz.
1 Select the function, frequency, and amplitude of the carrier.
For the carrier waveform, you can select a sine, square, triangle, ramp,
or arbitrary waveform.
For this example, select a 3 kHz sine wave with
an amplitude of 5 Vpp .
2 Enable FSK.
Notice that the
FSK
annunciator turns on.
3 Use the menu to set the “hop” frequency.
After you enable the
FSK
mode, the “recall menu” key will automatically
take you to the
FSK FREQ
command in the
MOD MENU
.
8: FSK FREQ
FSK Shift
Recall Menu
Shift
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Chapter 2 Front-Panel Menu Operation
To output an FSK waveform
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