Instrument Design and Function Description R&S CMU
1100.4903.82 3.16 E-5
Option UNIVERSAL SIGNALING UNIT R&S CMU-B21 Var 14/54
The UNIV. SIGN. UNIT MODULE is the control and measurement module which contains all circuit
parts for signaling and measuring network-specific parameters.
To this end, the digital I/Q data from the DIGITAL BOARD are used on the receiver side (RX) in order to
calculate test parameters.
On the transmitter side, analog network-specific I/Q data are generated and provided to the AUC
MODULE1 on the DIGITAL BOARD.
Design
The UNIV. SIGN. UNIT MODULE is designed as plug-in module with
two aluminum shell covers. It is equipped with a screwed-on aluminum
cover both at the front and rear to allow for optimal electrical shielding
of the module.
Cooling system
The casing is provided with ventilation holes on the right and left in
order to produce a large cooling flow through the module by means of
the instrument fan.
This efficient cooling is necessary, since a great number of highly
integrated fast digital devices is used on the module and up to six
sandwich modules can additionally be fitted so that the module is
densely packed.
Control and supply
The control, bus lines and voltage supply of the UNIV. SIGN. UNIT
MODULE are connected via two 96-pin VG multipoint and one 48-pin
VG multipoint connectors from MOTHERBOARD1. Further interfaces
for testing and debugging are provided on the top of the module.
Function
As standard, the UNIV. SIGN. UNIT MODULE VAR14 contains four
DSP’s (DSP 0 and DSP 1, CPDSP 1 and CPDSP 2) and is provided for
six sandwich modules.
As model Var54 the UNIV. SIGN. UNIT MODULE VAR54 contains
UNIV. SIGN. UNIT MODULE VAR14 and the two sandwich boards
MC68K MODULE and DSP2 MODULE.
Besides, if a very high computing power is required, one further DSP
MODULE (DSP MODULE3, Option R&S CMU-B55Var14) can be
fitted.
Furthermore, a slot for the Option R&S CMU-B52 SPEECH CODEC
Var 14 is provided.
Furthermore, a slot for the Option R&S CMU-B56 Var14/54 POWER
PC MODULE is provided.
One FPGA on the UNIV. SIGN. UNIT control all the processes on the
module.
An RS232 interface is available for debugging.
Besides, an ISA bus interface is installed for control and data
communication with the FRONT MODULE CONTROLLER.
Option DSP MODULE 3
R&S CMU-B55 Var14
The sandwich DSP MODULE 3 R&S CMU-B55 Var14
is directly inserted on the UNIV. SIGN. UNIT. It performs more than
two uplinks at GSM.
Option SIGNALING MODULE
R&S CMU-B54 Var14
The option SIGNALING MODULE R&S CMU-B54 Var14 contains the
two sandwich boards DSP MODULE 2 and MC68K MODULE. These
modules are directly inserted on the UNIV. SIGN. UNIT. It performs
GSM, TDMA, AMPS functionality.
Option R&S CMU-B54 Var14 is included in UNIV. SIGN. UNIT
MODULE R&S CMU-B21 VAR54.
To Next Page
Loading...
Need help?
General
