Agilent Technologies E1441A user service FM:DEViation?, FM:INTernal:FREQuency, Parameters

between 100 ∝Hz and 15 MHz (100 kHz maximum for triangle and ramp). The default is 1 kHz.

FM:DEViation

[SOURce:]FM:DEViation <peak deviation in Hz>MINMAX 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

Parameter Name	Parameter Type	Range of Values	Default Units
frequency	numeric	10E-03 to 7.5E+06	Hz

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? [MINMAX] 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 ]

Chapter 3 Agilent E1441A SCPI Command Reference 105