CMU  Front and Rear View 
1100.4903.12 1.1  E-10 
1 Preparation for Use 
This chapter describes the controls and connectors of the Universal Radio Communication Tester CMU 
and gives all information that is necessary to put the instrument into operation and connect external 
devices. Notes on reinstallation of the CMU software and a description of the VersionManager termi-
nate this chapter.  
 
 
 
 
Caution! 
Please make sure to observe the instructions of the following sections in order not to 
cause damage to the instrument or endanger people. This is of particular importance 
when the instrument is used for the first time. Also observe the general safety 
instructions at the beginning of this manual. 
 
 
A more detailed description of the hardware connectors and interfaces can be found in chapter 8. 
Chapter 2 provides an introduction to the operation of the CMU by means of typical examples of con-
figuration and measurement; for a description of the operating concept refer to chapter 3.  
For remote control of the CMU refer to the general description of the SCPI commands, the instrument 
model, the status reporting system and measurement control in chapter 5. 
 
 
 
Front and Rear View 
The front panel of the CMU consists of the VGA display with the softkey area (left side) and the hardkey 
area (right side, see Fig. 1-1). Brief explanations on the controls and connectors of the hardkey area 
and the rear panel are to be found on the next pages. Operation by means of softkeys is described in 
chapter 3, Manual Operation. 
 
0
12
3
4
5
6
7
8
9
.
-
ON / OFF
ENTER
1100.0008.02
VARIATION
DATA
FUNCTION SYSTEM
CONTROL
DATA
CTRL
MENU
SELECT
HELP SETUP
mark
symb
E
F
B
M/µ
µV
W
C
dBµV
k/m
G/n
A
mV
D
1
dB
dBm
UNIT...
EXP/CMP CONT/HALT
RF4 IN
UNIVERSAL  RADIO COMMUNICATION  TESTER             CMU 200
.
ESCAPE
*
abc
def
ghi
jkl mno
pqr
stu
vwx
yz
_ µ 
AF IN AF OUT
VOL
DEL
AUTO
INFO
RESET
PRINT
*
#
Ω
AUX 1 AUX 2
SPEECH
AUX 3
DATA 2
13 dBm
MAX
2 W
MAX
50 W
MAX
13 dBm
MAX
RF 3 OUT
RF 2 RF 1
DATA 1
INS
CLR
LC display with
menu example
9 softkeys with
alternating function,
Escape key (p. 4)
9 softkeys with 
alternating function,
ON/Standby key (p. 4)
Bar with 8 hotke
s
Keys and connectors
 
 
Fig. 1-1  CMU front view