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Agilent E1441A SCPI Command Reference 105
Chapter 3
between 100 µHz and 15 MHz (100 kHz maximum for triangle and ramp). The
default is 1 kHz.
FM:DEViation
[SOURce:]FM:DEViation <peak deviation in Hz>|MIN|MAX sets the peak frequency
deviation in hertz. This value represents the variation in frequency of the modulating
waveform from the carrier frequency. Select from 10 mHz to 7.5 MHz. The default
is 100 Hz.
MIN = 10 mHz. MAX = 7.5 MHz. [ Stored in volatile memory ]
Parameters
Comments • The carrier frequency must always be greater than or equal to the peak
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 equal the present carrier frequency. A
-221, “Settings conflict” error is generated and the deviation is adjusted.
• The sum of the carrier frequency and peak frequency deviation must be less
than or equal to the maximum frequency for the selected function plus 100 kHz
(15.1 MHz for sine and square, 200 kHz for triangle and ramp, and 5.1 MHz
for arbitrary waveforms). If you attempt to set the deviation to a value that is
not valid, the function generator will automatically adjust the deviation to the
maximum value allowed with the present carrier frequency. A -221, “Settings
conflict” error is generated and the deviation is adjusted.
FM:DEViation?
[SOURce:]FM:DEViation? [MIN|MAX] queries the peak frequency deviation.
Returns a value in hertz.
FM:INTernal:FREQuency
[SOURce:]FM:INTernal:FREQuency <frequency>|MIN |MAX sets the frequency of
the modulating waveform. Select from 10 mHz to 10 kHz. The default is 10 Hz.
MIN
= 10 mHz.
MAX = 10 kHz. [ Stored in volatile memory ]
Parameter Name Parameter Type Range of Values Default Units
frequency numeric 10E-03 to 7.5E+06 Hz