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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