Rohde & Schwarz CMU 200 Service Manual

R&S CMU Instrument Design and Function Description
1100.4903.82 3.19 E-5
Option WCDMA L1COPRO R&S CMU-B66/68/76/78
The WCDMA L1COPRO MODULE is the control and measurement module which contains all circuit
parts for signaling and measuring network-specific parameters.
To this end, the analog IF signal from the RXTX BOARD are used on the receiver side (RX) in order to
calculate test parameters (only with R&S CMU-B68/78).
O
n the transmitter side, analog network-specific IF signal data are generated and provided to the RXTX
MODULE.
Design
The WCDMA L1COPRO 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 and
additional cooling fins at the rear which are provided with a cover sheet
so that one special cooling duct are produced in order to produce a
large cooling flow through the module and the duct 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 four
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 WCDMA L1COPRO
MODULE are connected via two 96-pin VG and one 48-pin VG
multipoint connectors from MOTHERBOARD1. Further interfaces for
IF IN and IF OUT are provided on the top of the module.
Function
As standard (R&S CMU-B66/76), the WCDMA L1COPRO MODULE
contains the two sandwich boards WTX MODULE and TX-FEC
MODULE.
As Option R&S CMU-B68/78, the WCDMA L1COPRO MODULE
contains the two two sandwich boards WTX MODULE, TX-FEC
MODULE and additional the two sandwich boards WDDC MODULE
and RX-FEC MODULE.
Three FPGA’s on the WCDMA L1COPRO MODULE control all the
processes on the module. Two DSP’s, one for TX and one for RX,
generate and analyse the signals TX-FEC MODULE and RX-FEC
MODULE. See Figure 3-2 for a simplified block diagram.
Besides, an ISA bus interface is installed for control and data
communication with the FRONT MODULE CONTROLLER.
WTX MODULE
The sandwich WTX MODULE is directly inserted on the WCDMA
L1COPRO MODULE. It performs the digital-to-analog conversion of
the TX IF output signal.
TX-FEC MODULE
The sandwich TX-FEC MODULE is directly inserted on the WCDMA
L1COPRO MODULE. It performs the forward error correction of the
digital TX data.
WDDC MODULE
(only with Option
R&S CMU-B68/78)
The sandwich WDDC MODULE is directly inserted on the WCDMA
L1COPRO MODULE. It performs the analog-to-digital conversion of
the RX IF input signal.
RX-FEC MODULE
(only with Option
R&S CMU-B68/78)
The sandwich RX-FEC MODULE is directly inserted on the WCDMA
L1COPRO MODULE. It performs the forward error correction of the
digital RX data.

Rohde & Schwarz CMU 200 Specifications

General

Brand	Rohde & Schwarz
Model	CMU 200
Category	Test Equipment
Language	English