Synaccess-networks NP-0801DTM Manuel d'utilisateur télécharger pdf (Page 317)

AUDIOCOMMANDS

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317 HSPA+ATCommandsReferenceGuide



ParametersandValues

<aFn>,<bFn>,<aSn>,<bSn> Allarespecificparametersforthecalculationofdigitalbiquadfiltersasfollows:



)(

−−

⋅+⋅⋅+

zbzb

zazaa

FFF



)(

−−

⋅+⋅⋅+

zbzb

zazaa

SSS



‐32768‐32767‐eachvaluehastobeinterpretedassignedfixedpointnumberin

two’scomplementformatwith15fractionalbitsina16bitword(Q15).

Note:Intheformulas,payattentiontothemultiplier(2)forparameters<aF1>,

<aS1>,<bF1>and<bS1>

Parameterscanbesavedinnon‐volatilememoryusingAT#PSAVcommandan

d

areavailableforaudioprofiles1,2,3.Foraudioprofile0thevaluesarefixed.

ExtendedDownlinkBiquadFilters#BIQUADOUTEX

Setcommandallowstoconfiguretheparametersofthetwoextendeddigitalbiquadfilters )()( zHzH

SecondFirst

⋅



inDownlinkpath(receiving).Itisnotallo wedifactiveaudioprofileis0.

Readcommandreturnstheparametersfortheactiveprofileintheformat:

#BIQUADOUTEX:<aF0>,<aF1>,<aF2>,<bF1>,<bF2>,<aS0>,<aS1>,<aS2>,<bS1>,<bS2>

Note:Itisnotallowedifactiveaudioprofileis0;inthiscaseanERRORisreturned.

Testcommandreturnsthesupportedrangeofvaluesfor<aF0>,<a

F1>,<aF2>,<bF1>,<bF2>,<aS0>,<aS1>,<aS2>,

<bS1>,<bS2>.

Syntax

Command Commandtype

AT#BIQUADOUTEX=<aF0>[,<aF1>[,<aF2>[,<bF1>[,<bF2>[,<aS0>[,<aS1>

[,<aS2>[,<bS1>[,<bS2>]]]]]]]]]

Set

AT#BIQUADOUTEX? Read

AT#BIQUADOUTEX=? Test

ParametersandValues

<aFn>,<bFn>,<aSn>,<bSn> Allarespecificparametersforthecalculationofdigitalbiquadfiltersasfollows:



)(

−−

⋅+⋅⋅+

zbzb

zazaa

FFF



)(

−−

⋅+⋅⋅+

zbzb

zazaa

SSS



‐32768‐32767‐eachvaluehastobeinterpretedassignedfixedpointnumberin

two’scomplementformatwith15fractionalbitsina16bitword(Q15).



Note:Intheformulaspayattentiontothemultiplier(2)forparameters<aF1>,

<aS1>,<bF1>and<bS1>

Parameterscanbesavedinnon‐volatilememoryusingAT#.PSAVcommandan

d

areavailableforaudioprofiles1,2,3.Foraudioprofile0thevaluesarefixed.

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