FSK “Hop” Frequency
Hop frequency: 10 mHz to 15 MHz (100 kHz for triangle and ramp).
The default is 100 Hz. You can use sine, square, ramp, triangle, or
arbitrary waveforms for the hop frequency waveshape.
For arbitrary waveforms, the maximum hop frequency depends on
the number of points specified in the waveform. The five built-in
arbitrary waveforms can be output at a maximum of 5 MHz.
For an externally-controlled FSK waveform, the carrier frequency is
output when a “low”
TTL level is applied to the FSK terminal. The hop
frequency is output when a “high”
TTL level is applied.
For FSK, the sync signal is referenced to the FSK “hop” signal (not the
carrier). A momentary
TTL “high” pulse (> 200 ns) is output on the
transition to the “hop” frequency. The signal is output from the front-
panel SYNC terminal.
Front-Panel Operation: After enabling FSK, press Recall Menu to go
directly to the
FSK FREQ command in the menu.
8: FSK FREQ (MOD MENU)
Remote Interface Operation:
FSKey:FREQuency {<
frequency>|MINimum|MAXimum}
Number of Arb Points
8 to 8,192 (8k)
8,193 to 12,287 (12k)
12,288 to 16,000
Minimum Frequency
10 mHz
10 mHz
10 mHz
Maximum Frequency
5 MHz
2.5 MHz
200 kHz
Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation
92
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