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Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation
FSK Rate
The FSK rate is the rate at which the output frequency "shifts" between
the carrier frequency and the hop frequency when you select the
internal
source.
FSK
• FSK rate (internal source): 10 mHz to 50 kHz. The default is 10 Hz.
• The
rate is ignored when the external source is selected.
FSK
• Front-Panel Operation:
9: FSK RATE
(MOD MENU)
• Remote Interface Operation:
FSKey:INTernal:RATE {<
FSK Source
• FSK source: Internal or External. The default is Internal.
• 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 specified.
• When the external source is selected, the output frequency is
determined by the signal level on the rear-panel FSK terminal.
When a "low"
level is present, the carrier frequency is output.
TTL
When a "high"
level is present, the hop frequency is output.
TTL
• The maximum external
• The
annunciator turns on when the function generator is waiting
Ext
for an external trigger signal.
• Front-Panel Operation:
10: FSK SRC
(MOD MENU)
• Remote Interface Operation:
FSKey:SOURce {INTernal|EXTernal}
>|MINimum|MAXimum}
rate in Hz
rate is 1 MHz.
FSK
3
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