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Chapter 3 Features and Functions
Frequency Modulation (FM)
3
Carrier Frequency
The maximum carrier frequency depends on the function selected as
shown below. The default is 1 kHz for all functions.
•The carrier frequency must always be greater than or equal to the
frequency deviation. If you attempt to set the deviation to a value
greater than the carrier frequency (with FM enabled), the function
generator will automatically adjust the deviation to the maximum
value allowed with the present carrier frequency.
• The sum of the carrier frequency and deviation must be less than or
equal to the maximum frequency for the selected function
plus 100 kHz
(20.1 MHz for sine and square, 300 kHz for ramp, and 6.1 MHz for
arbitrary waveforms). If you attempt to set the deviation to a value
that is not valid, the function generator will automatically adjust it to
the maximum value allowed with the present carrier frequency.
• Front-Panel Operation: To set the carrier frequency, press the Freq
softkey for the selected function. Then use the knob or numeric
keypad to enter the desired frequency.
• Remote Interface Operation:
FREQuency {<frequency>|MINimum|MAXimum}
You can also use the
APPLy
command to select the function, frequency
,
amplitude, and offset with a single command.
Function Minimum Frequency Maximum Frequency
Sine
Square
Ramp
Arbs
1 µHz
1 µHz
1 µHz
1 µHz
20 MHz
20 MHz
200 kHz
6 MHz
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