Rohde & Schwarz CMU-K20, Operating Manual

Page: 234 / 646

Signalling: Connection Control
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.156 E-12
Remote control
CONFigure:MSSignal[:CSWitched][:TCH][:SSLot]:MS:PCL
PROCedure:SIGNalling[:CSWitched][:TCH][:SSLot]:MS:PCL
Timing
Advance
The
Timing Advance
softkey sets a (positive) delay time (in symbol periods)
correcting the timing of the mobile. In the network, timing advance is to compensate
for the propagation time of the signal from the BTS to the mobile and back.
Remote control
PROCedure:SIGNalling[:CSWitched][:TCH]:TADVance
CONFigure:MSSignal[:CSWitched][:TCH]:TADVance
DAI
Acoustic Dev .
The
DAI Acoustic Dev.
determines the routing of the speech data (Digital Audio
Interface (DAI) of the mobile or internal, i.e. normal mode) and which device is being
tested (speech transcoder/DTX functions or A/D & D/A):
The DAI can be set to one of the following modes:
Normal
Normal operation of the mobile; default setting during a call setup
Decoder
Test of speech decoder / DTX functions (downlink)
Encoder
Test of speech encoder / DTX functions (uplink)
Acoustic Devices
Test of acoustic devices and A/D & D/A
When entering the
Call Established
state, the DAI setting is always
Normal
. The
other options must be set explicitly after each call setup.
Remote control
PROCedure:SIGNalling[:CSWitched]:DAI <Interface>
Loop
The
Loop
softkey sets the test loop at the MS.
Receiver Quality
measurements use
their own test loops so the loop defined here is valid as long as no
Receiver Quality
measurement is active. All test loops are defined in standard 3GPP TS 04.14.
The following loops are available in single slot mode:
Off
No test loop activated
A
TCH loop including signalling of erased frames (full signalling)
B
Speech TCH loop without signalling of erased frames (residual bit
error rate)
C
TCH burst-by-burst loop
To activate a loop, the
Loop Command
function in the
Network
tab must be set to
Disable
or
Sensitivity;
see p. 4.176 .
Remote control
PROCedure:SIGNalling[:CSWitched][:SSLot]:LOOP
CONFigure:MSSignal[:CSWitched][:SSLot]:LOOP
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