Agilent X-Series Signal Generators SCPI Command Reference 249
Arb Commands
Dmodulation Subsystem–N5172B/82B with Option 431 ([:SOURce]:RADio:DMODulation:ARB)
IS95 This choice selects a filter that meets the criteria of the IS–95 standard.
IS95_EQ This choice selects a filter which is a combination of the IS–95 filter (above) and
the equalizer filter described in the IS–95 standard. This filter is only used for
IS–95 baseband filtering.
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.
EDGE This choice selects a linearized Gaussian filter as defined in GSM 05.04.
EWIDe This choice selects an EDGE spectrally wide pulse shape filter as per 3GPP TS
45.004.
EDGE EHSR This choice selects an EDGE high symbol rate spectrally narrow pulse shape filter
as per 3GPP TS 45.004.
WCDMa This choice selects a W- CDMA filter which is the equivalent of a Root Nyquist
filter with an alpha of 0.22 optimized for ACP.
AC4Fm This choice selects a predefined Association of Public Safety Communications
Officials (APCO) specified compatible 4–level frequency modulation (C4FM) filter.
"<user FIR>" This variable is any FIR filter file that you have stored in memory. The variable
needs no directory path indicating the location of the file, such as FIR: or
/USER/FIR. The command assumes the FIR directory. For more information on
file names, refer to “File Name Variables” on page 13.
*RST Root Nyquist
:FILTer:ALPHa
Supported N5172B/82B with Option 431
[:SOURce]:RADio:DMODulation:ARB:FILTer:ALPHa <val>
[:SOURce]:RADio:DMODulation:ARB:FILTer:ALPHa?
This command changes the Nyquist or Root Nyquist filter alpha value.
The filter alpha value can be set to the minimum level (0), the maximum level (1), or in between by
using fractional numeric values (0.001 to 0.999).
*RST +5.0000000E001
Range 0.000 to 1.000
Key Entry Filter Alpha
Key Entry Nyquist IS–95 EDGE
Gaussian IS–95 Mod WCDMA
User FIR IS–95 w/EQ Rectangle
Root Nyquist IS–95 Mod w/EQ EDGE Wide
APCO 25 C4FM
EDGE EHSR
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