Rohde & Schwarz R&S CMU-Z10 User manual

1158.9537.12-061
Manual
Antenna Coupler
R&S®CMU-Z10
1150.0801.02
RF Shielding Cover for CMU-Z10
R&S®CMU-Z11
1150.1008.02
BluetoothAntenna
R&S®CMU-Z12
1150.1043.02
USB Feed Through
R&S®CMU-Z13
1159.1200.02
Printed in the Federal
Republic of Germany
Test and Measurement Division

Bluetooth is a trademark owned by Bluetooth SIG Inc., USA, and licensed to Rohde & Schwarz.

R&S®CMU-Z10/-Z11/-Z12/-Z13 Contents
1158.9537.12 3 E-6
Contents
Safety Instructions ..............................................................................................................................5
Short Description of R&S®CMU-Z10/-Z11/-Z12/-Z13........................................................................7
Rear Connectors.........................................................................................................................8
Coupling Factors.................................................................................................................................9
Input Coupling Factor (–> Ext. Att. Input)..................................................................................10
Output Coupling Factor (–> Ext. Att. Output)............................................................................10
Determining the Coupling Factors.............................................................................................10
Installation Instructions....................................................................................................................12
Mounting the RF Shielding Cover .............................................................................................12
Mounting the Bluetooth Antenna...............................................................................................14
Mounting the USB Feed Through..............................................................................................14
Replacing the Base Plate..........................................................................................................14
Performance Test ..............................................................................................................................14
Maintenance.......................................................................................................................................15
Replacing the RF Sealing Cord.................................................................................................15

R&S®CMU-Z10/-Z11/-Z12/-Z13 Safety Instructions
1158.9537.12 5 E-6
Safety Instructions
This unit has been designed and tested in accordance with the EC Certificate of Conformity and has left
the manufacturer's plant in a condition fully complying with safety standards.
To maintain this condition and to ensure safe operation, the user must observe all instructions and
warnings given in this operating manual.
1. In order to comply with local EMC regulations, in some places it may be necessary
to have the RF shielding cover R&S®CMU-Z11 in place and latched when using the
antenna coupler R&S®CMU-Z10 or the Bluetooth antenna R&S®CMU-Z12. It is the
user's responsibility to ensure that the coupler R&S®CMU-Z10 and the antenna
R&S®CMU-Z12 is used in compliance with local regulations.
2. The RF sealing cord supplied with R&S®CMU-Z11 is an expendable part that must
be exchanged if it is visibly worn out or damaged.
3. The shielding cover must be latched and the transport lock must be fixed whenever
the R&S®CMU-Z10/-Z11 is carried or transported.
4. The shock absorber is to protect the antenna coupler, the shielding cover and the
RF sealing cord from damage and the user from injury when the cover is closed.
Never use the shielding cover R&S®CMU-Z11 without the shock absorber fixed on
both sides. Defective shock absorbers must be replaced.

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Qualitätsmanagementsystemistu.a.nach
ISO 9001 und ISO14001 zertifiziert.
Certificate of quality
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You have decided to buy a Rohde &
Schwarz product. You are thus assured of
receiving a product that is manufactured
using the most modern methods available.
This product was developed, manufac-
tured and tested in compliance with our
quality management system standards.
The Rohde & Schwarz quality manage-
ment system is certified according to stan-
dards such as ISO9001 and ISO14001.
Certificat de qualité
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Vous avez choisi d'acheter un produit
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ISO 9001
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ISO 14001
DQS REG. NO 1954 QM
DQS REG. NO 1954 UM

1007.8684.14-03.00
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R&S®CMU-Z10/-Z11/-Z12/-Z13 Short Description
1158.9537.12 7 E-6
Short Description of R&S®CMU-Z10/-Z11/-Z12/-Z13
The R&S®CMU-Z10/-Z11/-Z12/-Z13 test equipment is a complete solution for simple coupling and
interference-free testing of mobile phones (MS) in the complete frequency range between 770 MHz and
2.2 GHz.
•R&S®CMU-Z10 is the basic broadband antenna coupler.
•The RF shielding cover R&S®CMU-Z11 upgrades the antenna coupler to a fully enclosed RF
shielded chamber.
•The Bluetooth antenna R&S®CMU-Z12 can be integrated into the antenna coupler or used
separately.
•The USB feed through R&S®CMU-Z12 can be mounted instead of the DATA THROUGH connector
or the Bluetooth antenna in order to test a USB data connection between the MS under test and a
PC in parallel to the RF connection.
The physical properties of the test equipment and the technical specifications are described in the data
sheet. The following pages are to describe the different components and connectors of the test system
and their use. They also describe the upgrade of an antenna coupler R&S®CMU-Z10 with the RF
shielding cover R&S®CMU-Z11, measurement and correction of the coupling factors, and the
performance test.
Fig. 1 R&S®CMU-Z10/-Z11/-Z12
Slot with RF sealing cord
Transport lock for
R&S CMU-Z11
Closing handle for
R&S CMU-Z11
Shock absorber
Rear connectors,
see Fig. 2
Bluetooth antenna,
R&S CMU-Z12
Antenna coupler
R&S CMU-Z10
Universal mobile
phone holder (optional)

Short Description R&S®CMU-Z10/-Z11/-Z12/-Z13
1158.9537.12 8 E-6
Rear Connectors
On its rear side the antenna coupler R&S®CMU-Z10 is equipped with two N connectors for input and
output of RF test signals, a sub-D connector for input and output of DC, AF or data signals, and an
additional N connector if the Bluetooth antenna (R&S®CMU-Z12) is fitted.
Fig. 2 R&S®CMU-Z10 rear connectors
Description of the
connectors
To test a mobile with the antenna coupler, the test instrument is connected to
the coupler via the RF IN/OUT connector:
RF IN/OUT Standard bi-directional N female connector for antenna
coupler R&S®CMU-Z10
The following connectors can be used to connect the AF and RF circuit of a
mobile station that is tested in the shielded chamber but without using the
antenna coupler (to be used with option R&S®CMU-Z11).
DATA THROUGH 9-pin or 15-pin sub-D female connector for the DC, AF
or data signals of the MS under test
RF THROUGH Bi-directional N female connector for the RF circuit of
the MS under test
The last RF connector is used to test Bluetooth devices in the shielded
chamber. It is available if option R&S®CMU-Z12, Bluetooth antenna, is fitted.
Otherwise the opening for the connector is closed with a metal plate.
USB feed through
The optional USB feed through (R&S®CMU-Z13) can be mounted instead of
either the DATA THROUGH connector or the Bluetooth antenna (see section
Mounting the USB Feed Through on p. 14 ff.).
Tip: For the test of a USB data connection, the two possible connector
positions are equal. Just replace the connector that you do not
need for parallel tests.
Connection to test
instrument and DUT R&S®CMU-Z10 is supplied with one RF cable with 2 N male connectors for
connection to a test instrument (e.g. R&S®CMU 200) via RF IN/OUT, RF
THROUGH or the Bluetooth connector.
The DATA THROUGH connector is for connection to a test instrument an
appropriate cable (not supplied with the shielding chamber).

R&S®CMU-Z10/-Z11/-Z12/-Z13 Short Description
1158.9537.12 9 E-6
The USB feed through must be connected to the test instrument and the MS
under test using two appropriate, shielded USB cables according to standard
USB 1.1. At present USB 2.0 is not supported.
Note: Connecting USB cables and shielding
The USB feed through causes no radiation that might impair the
shielding effect of the chamber. To avoid interference from the
external connecting line, use a shielded USB cable that is
equipped with EMI ferrite attenuators.
Note: The RF transmission and the coupling factors depend on the RF connection between the
antenna coupler and the RF input/output of the test instrument (R&S®CMU 200). It is
recommended to use the high-quality RF cable supplied with R&S®CMU-Z10 for the
connection. See also section Coupling Factors on p. 9f.
Coupling Factors
The RF signal from the MS under test is attenuated on its way from the antenna coupler to the test
instrument. Analogously the RF generator signal from the test instrument is received by the MS under
test with a definite attenuation. We define the coupling factors for the two signal directions as the
difference between transmitted and received powers:
Output coupling factor/dB = <RF generator level of the R&S®CMU 200>/dBm
– <Received input level determined by the MS (RxLev)>/dBm
Input coupling factor/dB = <Transmitter output power of the MS>/dBm
– <RF input power measured at the R&S®CMU 200>/dBm
Once the coupling factors are known for a given mobile type and RF connection they can be reported to
the R&S®CMU 200 as external attenuation factors (Ext. Att. Input, Ext. Att. Output). The tester will then
correct all power measurements by the reported input coupling factor and increase its RF generator
level to compensate for the output coupling factor.
Note: The coupling factors depend on the position of the MS antenna relative to the active
coupling zone of the antenna coupler and therefore on the mobile type (for more
information see data sheet). Compiling a complete list of coupling factors for all mobile
types is not practicable, however, it is sufficient to determine the coupling factors once for
all mobiles of the same type.
In order to re-use the coupling factors for different mobiles of the same type, they must be
put into exactly the same position on the base plate or in the holder of the antenna coupler;
see section Replacing the Base Plate on p. 14 ff. Moreover, to exclude any additional
source of errors the coupling factors for a particular mobile type must be determined using
a fully functional and proven device ("golden" mobile phone).
The sign of the input and output coupling factors was chosen in accordance with the
definition of external input and output attenuation factors (Ext. Att. Input, Ext. Att. Output) in
the R&S®CMU 200.

Coupling Factors CMU-Z10/-Z11/-Z12
1158.9537.12 10 E-6
Input Coupling Factor (–> Ext. Att. Input)
If an external input attenuation is reported to the instrument, all levels measured are referred to the
output of the DUT and therefore shifted with respect to the actual level at the input connectors of the
CMU. The level ranges for the input connectors are shifted as well.
Attenuator
x dB
(Pnom - x) dBm Pnom dBm
0
123
456
789
.-
ON / OFF ENTER
1100.0008.02
VARIATIONDATA
FUNCTION SYSTEM
CONTROL
DATA CT RL
MENU
SELECT HELP SETUP
mark symb
EF
BM/µ
µV
W
C
dBµV
k/m
G/n A
mV
D
1
dB
dBm
UNIT...
EXP/CMP CONT/HALT
RF4 IN
UNIVERSAL RAD IO COMMUNICATION TESTER CMU 200
.
ESC APE
*
abc def ghi
jkl mno pqr
stu vwx yz
_µ
AFI N AFOUT
VOL
DEL
AUTO
INFO RESET
PRINT
*#
Ω
AUX1 AUX 2
SPEECH
AUX 3
DATA 2
13 dBm MAX 2W MAX 50WMAX 13 dBm MAX
RF3 OUT RF2 RF 1
DATA 1
INS
CLR
CMU
Ext. Att. Input (set): x dB
RFlevel(measured):
Pnom dBm
x
2
DEF 3
GHI
1
ABC
564
8
ÜVW
7
STU
.- 0
9
XYZ
SCRC L M
Output Coupling Factor (–> Ext. Att. Output)
If an external output attenuation is reported to the instrument, the output signal level is referred to the
input of the DUT, the generator level is therefore shifted with respect to the actual level at the output
connector of the CMU. The default value for the generator power and the level ranges for the RF
outputs are also shifted provided that the generator can output the required power, compensating for the
external attenuation or gain. Otherwise it is adapted to the level closest to the shifted default value.
Attenuator
x dB
(Pnom + x) dBm Pnom dBm
0
123
456
789
.-
ON / OF F ENTER
1100.0008.02
VARIA TIONDATA
FUNCTION SYSTEM
CONTROL
DATA CTRL
MENU
SEL ECT HELP SETUP
mark symb
EF
BM/µ
µV
W
C
dBµV
k/m
G/n A
mV
D
1
dB
dBm
UNIT...
EXP/CMP CONT/HALT
RF4 IN
UNIVERSAL RADIO COMM UNICATION TESTER CMU 200
.
ESCAPE
*
abc def ghi
jkl mno pqr
stu vwx yz
_µ
AFIN AF OUT
VOL
DEL
AUTO
IN FO RESET
PRINT
*#
Ω
AUX1 AUX 2
SPEEC H
AUX3
DATA 2
13 dBmMAX 2W MAX 50W MAX 13dBmMAX
RF3 OUT RF2 RF 1
DATA 1
INS
CLR
CMU
RF level: Pnom dBm
Ext. Att. Output: x dB
x
2
DEF 3
GHI
1
ABC
564
8
ÜVW
7
STU
.- 0
9
XYZ
SCRC L M
Determining the Coupling Factors
External input and output attenuation factors can be set in the RF tab of the Connection Control
menu, which is provided for all network tests. The procedure of determining the coupling factors is
analogous for all networks. As an example, we'll list the steps involved for a GSM mobile phone.
1. Connect the bidirectional RF connector RF IN/OUT of your antenna coupler R&S®CMU-Z10 to the
bidirectional RF connector RF 2 of the R&S®CMU 200, preferably using the high-quality RF cable
RG 214 supplied with R&S®CMU-Z10.
2. Put a fully functional and proven MS into a well-defined position relative to the coupler; see note on
p. 9: Put it on the base plate without holder or – preferably – fix it in the Universal Handy Holder
mounted on the other base plate of the antenna coupler. To this end press the button on the left
side to open the clamp, place the MS onto the holder with the keyboard upwards, shifting it
backwards to the stop, and close the adjustable clamp again to put the MS into a well-defined
position.
3. Switch on the R&S®CMU 200 and the MS.

R&S®CMU-Z10/-Z11/-Z12/-Z13 Coupling Factors
1158.9537.12 11 E-6
4. Access the GSMxxx-MS function group (where xxx corresponds to the GSM band of your MS),
Signalling test mode,to establish a call between the R&S®CMU 200 and the MS, setting the MS to
a definite Power Control Level (PCL).
A PCL 15 for a GSM900 mobile phone corresponds to a nominal transmitter output power of 13 dBm.
For more information refer to your operating manual for software options GSM400/850/900/1800/1900-
MS for CMU-B21 (R&S®CMU-K20/-K21/-K22/-K23/-K24), stock no. 1115.6088.12.
5. Open the Overview menu to display all measurement results that are relevant for determining the
coupling factors.
Fig. 3 GSM900 Signalling: Overview menu
6. To determine the output coupling factor of your proven mobile phone, subtract the reported RX
Level at the MS from the output level of the CMU (BS Signal – TCH Level – Used TS). In the
example of Fig. 3 above, the output coupling factor equals to (96.5 – 90.0) dB = 6.5 dB.
7. To determine the input coupling factor of your proven mobile phone, subtract the measured Avg.
Burst Power (Current) from the Reported Power of the MS. In the example of Fig. 3 above, the input
coupling factor equals to (13.0 – 5.5) dB = 6.5 dB.
8. Press the Connect. Control softkey and the AF/RF hotkey to report the coupling factors to the
R&S®CMU 200. Set the Ext. Att. Output equal to the output coupling factor and the Ext. Att. Input
equal to the input coupling factor (see Fig. 4 below).

Installation Instructions CMU-Z10/-Z11/-Z12
1158.9537.12 12 E-6
Fig. 4 GSM900 Signalling: AF/RF tab
Installation Instructions
It is recommended to use the antenna coupler R&S®CMU-Z10 together with the shielding cover R&S®
CMU-Z11. The shielding cover may even be required in some places to comply with local EMC
regulations; see safety instructions on p. 5 of this manual. If the antenna coupler is purchased together
with the cover, the shielded chamber comes ready-mounted. The same is true for the Bluetooth antenna
R&S®CMU-Z12.
The upgrade of the antenna coupler with the other options is described in the following sections.
Mounting the RF Shielding Cover
To upgrade an antenna coupler R&S®CMU-Z10 with a shielding cover R&S®CMU-Z11 proceed as
follows (see Fig. 5 below):
1. Use the four small (M2.5x10) countersunk screws supplied with R&S®CMU-Z11 to screw the two
hinges of the shielding cover to the bore-holes at the rear of the antenna coupler R&S®CMU-Z10.
2. Fix the two combination screws (M2.5x6) on both sides of the shock absorber.
3. Insert the longer axes of the two threaded bushes into the holes of the two combination screws and
use these bushes to fix the shock absorber to the shielding cover and to the antenna coupler. The
threaded bushes are fixed using the small Phillips screw (M2.5x10) plus a small and a larger disk.
The fixing to the cover contains an additional round bush.
Caution!
The shock absorber is to protect the antenna coupler, the shielding cover and the RF
sealing cord from damage and the user from injury when the cover is closed. Never
use the shielding cover R&S®CMU-Z11 without the shock absorber properly fixed on
both sides. Defective shock absorbers must be replaced.

R&S®CMU-Z10/-Z11/-Z12/-Z13 Installation Instructions
1158.9537.12 13 E-6
4. Fix the round bushes for the closing mechanism of the cover on both sides of the antenna coupler
using the large (M4x14) Phillips screws (only if they are not fixed ex factory).
Fig. 5 Mounting the RF shielding cover R&S®CMU-Z11
Slot with RF sealing cord
Transport lock for
R&S CMU-Z11
Slot for closing the cover
during operation,
on both sides
Shock absorber
Fixing of shock absorber
to the antenna coupler by
means of threaded bush
Antenna coupler
R&S CMU-Z10
Bore-holes for hinges,
on both sides
Fixing for closing the
cover during operation,
on both sides
Fixing of shock absorber
to the shielding cover
(mounted ex factory)

Performance Test CMU-Z10/-Z11/-Z12
1158.9537.12 14 E-6
Mounting the Bluetooth Antenna
To upgrade an antenna coupler R&S®CMU-Z10 with a Bluetooth antenna R&S®CMU-Z12 proceed as
follows (see Fig. 5 above):
1. Unscrew the three Phillips screws at the rear of the coupler to remove the metal plate covering the
opening for the antenna connector (see Fig. 2 on p. 8).
2. Insert the antenna connector into the opening from inside the coupler. The label must be on the
upper side of the antenna.
3. Re-use the three Phillips screws and the disks to fix the antenna to the coupler from the outside.
Mounting the USB Feed Through
The optional USB feed through (R&S®CMU-Z13) can be mounted instead of either the DATA
THROUGH connector or the Bluetooth antenna (see section Rear Connectors on p. 8f.). Simply
remove the DATA THROUGH connector or the Bluetooth antenna (or mounting cover, if no antenna is
mounted) and fix the USB feed through from the inside of the chamber. For details and drawings refer to
the installation instructions supplied with the option.
Note: Always use shielded cables to connect the USB feed through to the test instrument and the
MS under test (see section Rear Connectors on p. 8f.).
Replacing the Base Plate
The antenna coupler R&S®CMU-Z10 is delivered with two base plates made of plastic, one without
holder and one with the Universal Handy Holder mounted. The two plates can be easily exchanged after
unscrewing the seven Phillips screws from the top.
The holder is a valuable tool for holding different mobile phones in the same well-defined position; see
section Determining the Coupling Factors on p. 10 ff.
Performance Test
Compliance of the antenna coupler R&S®CMU-Z10 with the rated specifications can be checked by
connecting the coupler to a network analyzer using the RF cable supplied with the coupler. The VSWR
values are listed in the data sheet. The reflection loss is > 4 dB in the frequency range between
0.77 GHz and 0.87 GHz, > 5.2 dB in the frequency range between 0.87 GHz and 2.2 GHz.
The RF shielding cover R&S®CMU-Z11 complies with the specifications provided that the RF sealing
cord is not damaged; see section Replacing the RF Sealing Cord on p. 15.
Compliance of the Bluetooth antenna R&S®CMU-Z12 with the technical specifications can be checked
by connecting the antenna connector directly to a network analyzer. The VSWR is listed in the data
sheet. The reflection loss is > 7.4 dB in the relevant frequency range between 2.4 GHz and 2.5 GHz.

R&S®CMU-Z10/-Z11/-Z12/-Z13 Maintenance
1158.9537.12 15 E-6
Maintenance
The electrical components of the antenna coupler R&S®CMU-Z10 and the Bluetooth antenna do not
require any particular maintenance. The mechanical expendable parts are shown in Fig. 6 below.
Replacing the RF Sealing Cord
The RF sealing cord supplied with R&S®CMU-Z11 is an expendable part (order no. 1158.9514.00) that
is not under warranty and must be exchanged if it is visibly worn out or damaged. This can be easily
done after opening the screw on the outside of the antenna coupler that fixes the shock absorber (see
Fig. 5 above).

Maintenance CMU-Z10/-Z11/-Z12
1158.9537.12 16 E-6
Fig. 6 Mechanical expendable parts with order numbers
HANDLE
(
1
050
.112
0
.
00
)
LEVER
(
1
050
.11
3
7.
00
)