Rohde & Schwarz CMU-K20, Operating Manual

Page: 527 / 646

CMU-K20/21/22/23/24 Options and Extensions
1115.6088.12 6.223 E-12
Adaptive Multi-Rate (AMR) Speech Codec
(Option R&S CMU-K45)
With option R&S CMU-K45, the CMU provides the functionality for AMR speech codec tests. The
additional commands belong the the
NETWork[:CSWitched]…
and
MSSinfo
subsystems.
Subsystem NETWork[:CSWitched]:AMR (AMR Codec Test)
The subsystem
NETWork[:CSWitched]:AMR
comprises the commands to configure and test the AMR
speech codec. The subsystem corresponds to the table section
Adaptive Multi-Rate (AMR)
in the
Network
tab of the
Connection Control
menu.
CONFigure:NETWork[:CSWitched]:AMR:NSUPpression <Enable>
Noise Suppression
<Enable>
Description of parameters Def. value Def. unit FW vers.
ON | OFF
Noise suppression switched on or off ON – V3.40
Description of command Sig. State
This command switches noise suppression at the AMR speech codec of the MS on or off.
≠
CEST,
Q: all
CONFigure:NETWork[:CSWitched]:AMR:HRATe:DLCMode <Mode>
Codec Mode DL, Half Rate
PROCedure:NETWork[:CSWitched]:AMR:HRATe:DLCMode <Mode>
<Mode>
Description of parameters Def. value Def. unit FW vers.
CM1 | CM2 | CM3 | CM4
DL codec mode 1, 2, 3, 4 CM3 – V3.40
Description of command Sig. State
This command sets the codec mode that the CMU uses to generate the speech data transmitted to
the MS under test. The setting is valid for Half Rate AMR speech coder tests; see command
CONFigure:NETWork[:CSWitched]:SMODe:TRAFfic
on p. 6.197 .
To query the DL codec mode that the MS requests use
[SENSe:]MSSinfo:AMR:HRATe:DLCMode?
(p. 6.209 ).
all
CONFigure:NETWork[:CSWitched]:AMR:FRATe:DLCMode <Mode>
Codec Mode DL, Full Rate
PROCedure:NETWork[:CSWitched]:AMR:FRATe:DLCMode <Mode>
<Mode>
Description of parameters Def. value Def. unit FW vers.
CM1 | CM2 | CM3 | CM4
DL codec mode 1, 2, 3, 4 CM3 – V3.40
Description of command Sig. State
This command sets the codec mode that the CMU uses to generate the speech data transmitted to
the MS under test. The setting is valid for Full Rate AMR speech coder tests; see command
CONFigure:NETWork[:CSWitched]:SMODe:TRAFfic
on p. 6.197 .
To query the DL codec mode that the MS requests use
[SENSe:]MSSinfo:AMR:FRATe:DLCMode?
(see p. 6.209 ).
all
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