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Agilent X-Series Signal Generators SCPI Command Reference 351

Digital Signal Interface Module Commands

Digital Subsystem—Option 003 and 004 ([:SOURce])

:DIGital:DATA:INPut:FILTer

Supported N5172B/82B with option 004

:DIGital:DATA:INPut:FILTer

:DIGital:DATA:INPut:FILTer?

This command selects the pre- modulation filter type.

RNYQuist This choice selects a Root Nyquist (root raised cosine) filter. This filter is adjusted

using Alpha.

NYQuist This choice selects a Nyquist (raised cosine) filter. This filter is adjusted using

Alpha.

GAUSsian This choice selects a Gaussian filter which is adjusted using Bbt values.

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.

"<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.

WCDMA This choice selects the W- CDMA filter, which is the equivalent of a root Nyquist

filter with an Alpha value of 0.22.

Rectangle This choice selects a one- symbol- wide rectangular filter.

EDGE This choice selects a linearized Gaussian filter as defined in GSM 05.04.

EDGE_Wide This choice selects an EDGE spectrally wide pulse shape filter as per 3GPP TS

45.004.

EDGE_HSR This choice selects an EDGE high symbol rate spectrally narrow pulse shape filter

as per 3GPP TS 45.004

APCO_25_C4FM This choice selects a predefined Nyquist filter with alpha of 0.2 combined with a

shaping filter. This satisfies the requirements of ITIA/EIA 102.BAAA Sec- 9 for the

APCO- 25 Common Air Interface.

Example

:DIG:DATA:INP:FILT Nyquist

The preceding example selects the Nyquist filter.

Agilent Technologies N5171B User Manual

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