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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 waveform
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 waveform plus 100 kHz
(30.1 MHz for sine and square, and 300 kHZ for ramp).
If you attempt to
set the deviation to an invalid value, the waveform generator will
automatically adjust it to the maximum value allowed with the
present carrier fr
equency.
• Front-Panel Operation: To set the carrier frequency, press the
Frequency softkey (under )for the selected function. Then use
the knob or numeric keypad to enter the desired frequency.
• Remote Interface Operation:
[SOURce[1|2]:]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
Pulse
PRBS
Noise BW
Arbs
1 Hz
1 Hz
1 Hz
1 Hz
1 Hz
1 mHz
1 Sa/sec
30 MHz
30 MHz
200 kHz
30 MHz
30 MHz
30 MHz
250 MSa/sec