Rohde & Schwarz CMU-K20, Operating Manual

Page: 258 / 646

Signalling: Connection Control
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.180 E-12
Speech
Encoder
The
Speech Encoder
softkey selects the input source for the CMU speech encoder
(option CMU-B52). The following two input sources are available:
Generator
Use the audio generator signal which is also fed to the
AF OUT
connector on the CMU front panel
Handset
Use the signal of the 9-pole
SPEECH
(handset) connector on the CMU
front panel
Remote control
ROUTe:SPENcoder[:INPut] HANDset | GENerator
Speech
Decoder
The
Speech Decoder
softkey selects the output destination for the CMU speech
decoder (option CMU-B52). The following output destinations are available:
Handset
Route speech decoder output to the 9-pole
SPEECH
(handset)
connector on the CMU front panel
Analyzer
Route speech decoder output to audio analyzer. The standard
analyzer input socket
AF IN
is disabled
(Off).
Analyzer 2
Route speech decoder output to secondary audio analyzer. The
standard secondary analyzer input socket
AUX 1
is disabled
(Off).
Analyzer Both
Route speech decoder output to primary audio analyzer. The
standard primary and secondary analyzer input sockets
AF IN
and
AUX 1
are disabled
(Off).
The primary and secondary audio circuits are described in detail in chapter 4 and 6
of the CMU200/300 operating manual.
Remote control
ROUTe:SPDecoder[:OUTPut] HANDset | ANALyzer | ANA2 | ABOTh
AF Connector
Overview
The
AF Connector Overview
shows the destination of the input signals fed in via
AF IN and AUX 1 and the signal sources for the two audio output connectors AF
OUT and AUX 2. The routing of input and output signals does not depend on the
Speech Encoder
settings but is a function of the
Speech Decoder
output
destination. In the default configuration
(Speech Decoder = Handset),
the
connectors AF IN and AF OUT are used as input and output for the primary audio
circuit (Analyzer 1, Generator 1). AUX 1 and AUX 2 are used as input and output
for the secondary audio circuit (Analyzer 2, Generator 2). If the
Speech Decoder
output is routed to one of the Analyzers, it replaces the external audio input signal.
The corresponding input connector is disabled
(Off)
.
Reference Frequency (Connection Control – Sync.)
The
Sync.
tab determines the reference signal for synchronization. This includes
•
The selection of internal or external reference frequency
•
The output mode for the reference frequency
(F REF OUT 2)
The functions of this menu are described in the section
GSM400/850/900/1800/1900-MS Non
Signalling
on page
4.82
ff.
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