Instrument Design and Function Description R&S CMU
1100.4903.82 3.22 E-5
Option CDMA2000 Signaling Unit R&S-B83 Var12
The CDMA2000 Signalling Unit is a module of the R&S CMU200 providing signalling and measuring
support for the CDMA2000 cellular phone network.
With the use of analog and digital hardware and firmware, this module uses the down converter and a
signal generator in the R&S CMU200 to establish a link with a CDMA mobile station.
Design
The CDMA2000 Signalling Unit is a plug-in module with a complete
aluminum shell providing optimal electrical shielding of the module.
Cooling system
Ventilation holes on the right and left of the shell produces a large cooling
flow through the module by means of the instrument fan.
Control and supply
The MOTHERBOARD 1 provides bus lines, the voltage supply, and controls
the CDMA2000 Signalling Unit via two 96-pin connectors and one 48-pin
connector. Further interfaces for testing and debugging are provided on the
top of the module.
Function
The CDMA2000 Signalling Unit contains the hardware for signal
demodulation and signal generation of a CDMA2000 system. See Figure
3-2 for a simplified block diagram.
A POWER PC with peripheral equipment and one FPGA with peripheral
ASIC on the board control all the processes on the module
An Ethernet interface is available for data input and output (Option R&S
CMU-B87).
An RS232 interface is available for debugging.
An AT-bus interface is used for control and data communication with the
front module computer.
1xEV-DO Module
R&S CMU-B88
The Option 1xEV-DO Module R&S CMU-B88 is designed as sandwich
module and is directly plugged onto the CDMA2000 SIGN. UNIT. This
option permits to generate 1xEV-DO TX Non Signaling signals.
Access Module
R&S CMU-B82
The Option Access Module R&S CMU-B82 is designed as sandwich module
and is directly plugged onto the CDMA2000 SIGN. UNIT. An additional
cable to the rearpanel of the R&S CMU is included. This option permits
access to the special Access Interface.
This option can be fitted only without the option R&S CMU-B85.
Speech Codec Module
R&S CMU-B85 VAR02
The Option SPEECH CODEC R&S CMU-B85 is designed as sandwich
module and is directly plugged onto the CDMA2000 SIGN. UNIT. This
option permits to read in and output analog speech signals (handsetin/out
lines) via A/D and D/A converters.
This option can be fitted only without the option R&S CMU-B82.
Message Monitor
R&S CMU-B87
This Option Message Monitor R&S CMU-B87 is designed as a cable to
connect the CDMA2000 SIGN. UNIT with the rearpanel of the R&S CMU
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