CMU Instrument Design and Function Description
1100.4903.82 3.1 E-4
3 Repair
This chapter describes the design of the CMU, simple measures for repair and troubleshooting and, in
particular, the replacement of modules. For troubleshooting and diagnosis, a maintenance menu is
available, which permits to poll diagnostic voltages of the modules and indicate limit violations.
The installation of options and software update are explained in chapter 4 of this service manual.
Instrument Design and Function Description
Instrument design
Cabinet design
A detailed overview of the CMU design will be presented with the block
diagram below and the exploded views (see chapter 5).
The following function description of the instrument refers to the block
diagram.
The casing of the CMU is a robust, gray-blue Rohde & Schwarz standard
casing according to BW 2000.
It consists of a frame with integrated rear panel and a labeling panel at
the front of the frame. The frame is covered by a one-piece tube and
screwed with four rear-panel feet. Two front handles are screwed to the
frame as standard, a further handle on the left side can be provided as
accessory.
The dimensions are as follows:
Overall: W*H*L 465 mm * 193 mm * 517 mm
Rackmount: W*H 1/1 of 19 inch * 4 units
Note: The terms "left" and "right" in the manual always refer to the front view of the instrument.
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