FSK "Hop" Frequency
The maximum alternate (or "hop") frequency depends on the function
selected as shown below. The default is 100 Hz for all functions.
Function
Minimum Frequency
1 µHz
Sine
1 µHz
Square
1 µHz
Ramp
1 µHz
Arbs
• The internal modulating waveform is a square wave with a 50%
duty cycle.
• When the External source is selected, the output frequency is
determined by the signal level on the rear-panel Trig In connector.
When a logic low level is present, the carrier frequency is output.
When a logic high level is present, the hop frequency is output.
• Front-Panel Operation: To set the "hop" frequency, press the
Hop Freq softkey. Then use the knob or numeric keypad to enter the
desired frequency.
• Remote Interface Operation:
FSKey:FREQuency {<frequency>|MINimum|MAXimum}
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
FSK source.
• FSK rate (internal source): 2 mHz to 100 kHz. The default is 10 Hz.
• The FSK rate is ignored when the external FSK source is selected.
• Front-Panel Operation: To set the FSK rate, press the FSK Rate
softkey. Then use the knob or numeric keypad to enter the desired rate.
• Remote Interface Operation:
FSKey:INTernal:RATE {<rate in Hz>|MINimum|MAXimum}
Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation
Maximum Frequency
20 MHz
20 MHz
200 kHz
6 MHz
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