Agilent X-Series Signal Generators SCPI Command Reference 389
Real–Time Commands
Custom Subsystem–Option 431([:SOURce]:RADio:CUSTom)
IS95_MOD This choice selects a filter that meets the criteria of the IS-95 error function (for
improved adjacent channel performance) with lower passband rejection than the filter
specified in the IS-95 standard.
IS95_MOD_EQ This choice selects a filter which is a combination of the equalizer filter described in the
IS-95 standard and a filter that meets the criteria of the IS-95 error function (for
improved adjacent channel performance), with lower passband rejection.
AC4Fm This choice selects a predefined Association of Public Safety Communications Officials
(APCO) specified compatible 4-level frequency modulation (C4FM) filter.
UGGaussian This choice selects a GSM Gaussian filter (Gaussian filter with a fixed BbT value of
0.300).
"<user FIR>" This variable is any filter file that you have stored into memory. Refer to “File Name
Variables” on page 13 for information on the file name syntax.
*RST RNYQ
:IQ:MODulation:ATTen
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:IQ:MODulation:ATTen <value>
[:SOURce]:RADio:CUSTom:IQ:MODulation:ATTen?
This command sets the attenuation level of the I/Q signals being modulated through the signal
generator RF path.
The variable <value> is expressed in units of decibels (dB).
*RST Varies (instrument dependent)
Range 0 to 50
Key Entry Modulator Atten Manual Auto
:IQ:MODulation:ATTen:AUTO
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:IQ:MODulation:ATTen:AUTO ON|OFF|1|0
[:SOURce]:RADio:CUSTom:IQ:MODulation:ATTen:AUTO?
This command enables or disables the I/Q attenuation auto mode.
ON (1) This choice enables the attenuation auto mode which optimizes the modulator
attenuation for the current conditions.
OFF (0) This choice holds the attenuator at its current setting or at a selected value. Refer
to the :IQ:MODulation:ATTen command for setting the attenuation value.
Key Entry Root Nyquist Nyquist Gaussian Rectangle IS-95 IS-95 w/EQ
IS-95 Mod IS-95 Mod w/EQ APCO 25 C4FM UN3/4 GSM Gaussian
User FIR
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