Rohde & Schwarz CMU 200 User manual

1100.4903.82-04- 1
Test and Measurement
Division
Service Manual Instrument
Universal Radio Communication
Tester
CMU200/CMU300
1100.0008.02/1100.0008.03
Printed in the Federal
Republic of Germany

CMU Tabbed Divider Overview
1100.4903.82 RE E-3
Tabbed Divider Overview
Spare Parts Express Service
List of R&S Representatives
Safety Instructions
Contents
Contents of Manuals for Universal Radio Communication Tester CMU
Tabbed Divider
1 Chapter 1: Performance Test
2 Chapter 2: Adjustment
3 Chapter 3: Repair
4 Chapter 4: Software Update/Installation of Options
5 Chapter 5: Documents
Index

1007.9016
Spare Parts Express Service
Phone: [phone] - 2465
Fax: [phone]
E-mail: w[email protected]
In case of urgent spare parts requirements for this Rohde &
Schwarz unit, please contact our spare parts express
service.
Outside business hours, please leave us a message or
send a fax or e-mail. We shall contact you promptly.

CMU Contents
1100.4903.82 3 E-4
Contents
1 Performance Test................................................................................................1.1
General..............................................................................................................................................1.1
A) Calibration by an R&S Representative with an ACS Calibration System ........1.1
B) Sending the Instrument to the Factory (Memmingen, Germany)..................... 1.1
Necessary Documents ............................................................................................................ 1.1
Measuring Instruments and Auxiliary Equipment........................................................................1.2
Test Setups .............................................................................................................................1.3
Reference Frequencies.................................................................................................1.3
TX Level Measurements ...............................................................................................1.3
General TX measurements...........................................................................................1.4
RX Level measurements...............................................................................................1.4
General RX Measurements........................................................................................... 1.5
RX Demodulation Measurements .................................................................................1.5
Tolerance Analysis ..........................................................................................................................1.6
Manual Test Procedure ................................................................................................................... 1.7
Selftest.....................................................................................................................................1.7
Interface Test...........................................................................................................................1.8
IEC-bus Interface ..........................................................................................................1.8
RS–232 Interface ..........................................................................................................1.8
Reference Frequencies...........................................................................................................1.8
REF IN .........................................................................................................................1.8
REF OUT 1....................................................................................................................1.9
REF OUT 2....................................................................................................................1.9
TX Frequency Accuracy........................................................................................................ 1.10
TX Frequency Settling Time..................................................................................................1.10
TX Level Error .......................................................................................................................1.10
VSWR....................................................................................................................................1.10
TX Level Settling Time ..........................................................................................................1.11
TX Harmonics........................................................................................................................1.11
TX Non Harmonics................................................................................................................1.11
TX In-Band Spurious Signals ................................................................................................ 1.11
TX Fixed Spurious Signals .................................................................................................... 1.12
TX SSB Phase Noise ............................................................................................................1.12
TX Residual FM.....................................................................................................................1.12
TX Residual AM.....................................................................................................................1.12
TX Carrier/Sideband Suppression, Max. Distortion...............................................................1.13
RX Power Meter (Frequency-Selective)................................................................................ 1.13

Contents CMU
1100.4903.82 4 E-4
RX Power Meter (Wideband).................................................................................................1.13
RX Harmonics .......................................................................................................................1.13
RX Spurious Response / Image Rejection............................................................................1.14
RX SSB Phase Noise............................................................................................................ 1.14
RX Residual FM/AM..............................................................................................................1.15
RX Dynamic/ Average Noise Level........................................................................................1.15
Options for CMU200..............................................................................................................1.16
TX GSM Modulation.................................................................................................... 1.16
RX GSM Dem odulation.......................................................................................1.16
Function Test with Mobile Stations (CMU200)......................................................................1.17
GSM mobile test..........................................................................................................1.17
CDMA mobile test .......................................................................................................1.17
IS136-mobile test ........................................................................................................1.17
AMPS-mobile test........................................................................................................1.17
Test Report.....................................................................................................................................1.18
2 Adjustment...........................................................................................................2.1
Manual Adjustment..........................................................................................................................2.1
Measuring Instruments and Auxiliary Equipment ....................................................................2.1
Preparing the Instrument.........................................................................................................2.2
Adjusting the + 5 VDC Reference Voltage ..............................................................................2.2
Adjusting the 10 MHz Reference Frequency...........................................................................2.3
TCXO 2.3
OCXO REFERENCE OSC. CMU-B11..........................................................................2.3
OCXO REFERENCE OSC. CMU-B12..........................................................................2.3
Automatic Adjustment of Module Data.......................................................................................... 2.4
Preparing the adjustment ........................................................................................................2.4
Performing the adjustment......................................................................................................2.4
3 Repair...................................................................................................................3.1
Instrument Design and Function Description............................................................................... 3.1
Block diagram..........................................................................................................................3.2
Instrument Frame.................................................................................................................... 3.3
Rear of Instrument Frame.......................................................................................................3.3
Front of Instrument Frame.......................................................................................................3.3
Cooling the Instrument ............................................................................................................3.4
FRONT MODULE....................................................................................................................3.5
POWER SUPPLY....................................................................................................................3.6
MOTHERBOARD....................................................................................................................3.7
REFERENCE BOARD............................................................................................................. 3.8

CMU Contents
1100.4903.82 5 E-4
Option OCXO REFERENCE OSC. CMU-B11 or B12.............................................................3.9
RF FRONTEND.......................................................................................................................3.9
RXTX BOARD1.....................................................................................................................3.10
DIGITAL BOARD...................................................................................................................3.12
Option UNIVERSAL SIGNALLING UNIT CMU-B21..............................................................3.13
Option AUDIO-GEN. + ANA. CMU-B41 ................................................................................3.15
Option CDMA (IS95) Signalling Unit CMU-B81.....................................................................3.16
MODULE Replacement.................................................................................................................. 3.17
Replacing the FRONT MODULE...........................................................................................3.17
Opening the instrument and removing the FRONT MODULE .......................3.17
Installing the new FRONT MODULE and completing the instrument.............3.18
Putting into operation...................................................................................... 3.18
Replacing the FRONT MODULE CONTROLLER in the FRONT MODULE .........................3.19
Opening the instrument and removing the FRONT MODULE .......................3.19
Removing the FRONT MODULE CONTROLLER from the FRONT MODULE3.20
Installing the new FRONT MODULE CONTROLLER ....................................3.20
Installing the option again and completing the instruments............................3.20
Putting into operation...................................................................................... 3.21
Replacing the Lithium Battery in the FRONT MODULE........................................................3.22
Opening the instrument and removing the FRONT MODULE .......................3.22
Removing the lithium battery.......................................................................... 3.23
Installing the new battery and completing the instrument...............................3.24
Putting into operation...................................................................................... 3.24
Replacing the Hard Disk in the FRONT MODULE................................................................3.25
Opening the instrument and removing the FRONT MODULE .......................3.25
Removing the hard disk from the FRONT MODULE .....................................3.26
Installing the new hard disk ............................................................................3.26
Putting into operation...................................................................................... 3.27
Replacing the Memory Modules in the FRONT MODULE ....................................................3.28
Opening the instrument and removing the FRONT MODULE .......................3.28
Making the memory modules accessible .......................................................3.29
Removing the memory module ......................................................................3.29
Installing the new memory module and completing the instrument................3.29
Putting into operation...................................................................................... 3.29
Replacing the LCD and/or DC/AC Converter in the FRONT MODULE................................. 3.30
Opening the instrument and removing the FRONT MODULE .......................3.30
Making the LCD accessible............................................................................3.31
Removing the LCD and/or DC/AC Converter.................................................3.31
Installing the new LCD and/or DC/AC converter and completing the instrument3.31
Putting into operation...................................................................................... 3.31
Replacing the Keyboard Membrane and/or Mat on the FRONT MODULE...........................3.32
Opening the instrument and removing the FRONT MODULE .......................3.32
Removing the membrane...............................................................................3.33
Installing the new membrane and completing the instrument........................3.33
Putting into operation...................................................................................... 3.33
Replacing the Labeling Panel on the FRONT MODULE.......................................................3.34
Removing the old labeling panel..................................................................... 3.34
Installing the new labeling panel and completing the instrument ...................3.34
Putting into operation...................................................................................... 3.34
Replacing the Options FLOPPY DISK DRIVE CMU-B61 or PCMCIA INTERFACE............. 3.35

Contents CMU
1100.4903.82 6 E-4
Opening the instrument and removing the FRONT MODULE .......................3.35
Replacing the option.......................................................................................3.36
Completing the instrument and putting into operation.................................... 3.36
Replacing the RF FRONTEND..............................................................................................3.37
Opening the instrument and removing the RF FRONTEND ..........................3.37
Installing the new RF FRONTEND MODULE and completing the instrument3.37
Automatic module data adjustment................................................................3.37
Replacing the REFERENCE BOARD....................................................................................3.38
Opening the instrument and removing the REFERENCE BOARD................3.38
Installing the new REFERENCE BOARD and completing the instrument......3.38
Automatic module data adjustment................................................................3.38
Replacing the RXTX BOARD1..............................................................................................3.39
Opening the instrument and removing the RXTX BOARD1...........................3.39
Installing the new RXTX BOARD1 and completing the instrument................3.39
Automatic module data adjustment................................................................3.39
Replacing the TR-CORRECTION MODULE in the RXTX BOARD1.....................................3.40
Opening the instrument and removing the TR-CORRECTION MODULE .....3.40
Installing the new TR-CORRECTION BOARD and completing the instr. ......3.40
Automatic module data adjustment................................................................3.40
Replacing the DIGITAL BOARD............................................................................................3.41
Opening the instrument and removing the DIGITAL BOARD ........................3.41
Installing the new DIGITAL BOARD and completing the instrument..............3.41
Automatic module data adjustment................................................................3.41
Replacing the MODULES: ADC MODULE1, DDC MODULE1, TXDSP MODULE1, AUC
MODULE1 in the DIGITAL BOARD.......................................................................................3.42
Opening the instrument and removing the modules.......................................3.42
Installing the new sandwich module and completing the instrument.............. 3.42
Automatic module data adjustment................................................................3.43
Replacing the Option OCXO REFERENCE OSC. CMU-B11 or CMU-B12........................... 3.44
Opening the instrument and removing the OPTION OCXO REF. OSC.........3.44
Installing the new OPTION OCXO REFERENCE OSC. and completing the
instrument..................................................................................... 3.44
Manual OCXO adjustment .............................................................................3.44
Replacing the Option UNIVERSAL SIGNALLING UNIT CMU-B21.......................................3.45
Opening the instrument and removing the OPTION UNIV. SIGN. UNIT .......3.45
Installing the new OPTION UNIV. SIGN. UNIT and completing the instr....... 3.45
Automatic module data adjustment................................................................3.45
Replacing the MODULES: DSP MODULE0/1, IQOUT MODULE, OPTION SPEECH CODEC
CMU-B52 (INCLUDES DSP MODULE3) in the UNIV. SIGN. UNIT......................................3.46
Opening the instrument and removing the modules.......................................3.46
Installing the new sandwich module and completing the instrument.............. 3.46
Automatic module data adjustment................................................................3.47
Replacing the Option AUDIO-GEN. + ANA. CMU-B41 .........................................................3.48
Opening the instrument and removing the Option AUDIO-GEN. + ANA........3.48
Installing the new Option AUDIO-GEN. + ANA. and completing the instr...... 3.48
Automatic module data adjustment................................................................3.48
Replacing the POWER SUPPLY...........................................................................................3.49
Removing the POWER SUPPLY ...................................................................3.49
Installing the new POWER SUPPLY..............................................................3.49
Replacing the Instrument Fan ...............................................................................................3.50
Opening the instrument and removing the fan...............................................3.50
Installing the new fan and completing the instrument.....................................3.50

CMU Tables
1100.4903.82 7 E-4
Replacing the MOTHERBOARD...........................................................................................3.51
MOTHERBOARD1 (big MOTHERBOARD) ................................................................3.51
Opening the instrument and removing MOTHERBOARD1............................3.51
Installing the new MOTHERBOARD1 and completing the instrument...........3.51
MOTHERBOARD2 (small MOTHERBOARD).............................................................3.52
Opening the instrument and removing MOTHERBOARD2............................3.52
Installing the new MOTHERBOARD2 and completing the instrument...........3.52
FRONTPANEL BOARD (at the front of the instrument frame) ...................................3.52
Opening the instrument and removing the FRONTPANEL BOARD..............3.52
Installing the new FRONTPANEL BOARD and completing the instrument ...3.52
REARPANEL BOARD1 (Interface board for Standard Connectors at the Rear of the
Instrument Frame).......................................................................................................3.53
Opening the instrument and removing the REARPANEL BOARD1...............3.53
Installing the new REARPANEL BOARD1 and completing the instrument....3.53
REARPANEL BOARD2 (Interface Board for Further Connectors at the Rear of the
Instrument Frame).......................................................................................................3.53
Opening the Instrument and removing the REARPANEL BOARD2 ..............3.53
Installing the new REARPANEL BOARD2 and completing the instrument....3.53
Troubleshooting ............................................................................................................................ 3.54
Troubleshooting using the LEDs (H1 to H8) on the MOTHERBOARD .................................3.55
Troubleshooting using the SELFTEST Menu for Modules....................................................3.57
Troubleshooting using the INFO Menu for Modules..............................................................3.58
Troubleshooting using the ERROR messages on the LC display.........................................3.60
More troubleshooting.............................................................................................................3.61
General errors on the transmitter side of the CMU ...............................................................3.61
General errors on the receiver side of the CMU....................................................................3.62
4 Software Update/Installing Options...................................................................4.1
New Installation of the CMU Software...........................................................................................4.1
Software Update via PCMCIA INTERFACE............................................................................4.1
Software Update via FLOPPY DISK DRIVE............................................................................4.1
Performing a Software Update................................................................................................4.2
Reinstalling the Old Software.........................................................................................................4.3
Loading Software as long as there is no VersionManager in the CMU...................................... 4.3
Installing the Options...................................................................................................................... 4.4
5 Documents...........................................................................................................5.1
Module and Cable Exchange..........................................................................................................5.1

Tables CMU
1100.4903.82 8 E-4
Tables
Table 1-1 Measuring instruments and auxiliary equipment for manual performance test.....................1.2
Table 1-2 Test report ...........................................................................................................................1.18
Table 2-1 Measuring instruments and auxiliary equipment for manual adjustment of the CMU........... 2.1
Table 5-1 List of power cables available................................................................................................5.2

CMU Manuals
1100.4903.82 0.1 E-4
Contents of Manuals for Universal Radio Communi-
cation Tester CMU200/CMU300
Service Manual Instrument
This service manual for Universal Radio Communication Tester CMU provides information on
checking the generator for compliance with rated specifications, as well as on adjustment, repair and
troubleshooting. It further contains all the information necessary for repairing the generator by the re-
placement of modules.
The service manual comprises five chapters and an annex (chapter 5) containing the CMU circuit docu-
mentation:
Chapter 1 Provides all the information necessary to check CMU for compliance with rated
specifications. The required test equipment is included, too.
Chapter 2 Describes the adjustment of the +5 VDC reference source and of the 10-MHz
reference frequency source as well as the software-controlled adjustment of indi-
vidual module data following module replacement.
Chapter 3 Describes the design of CMU as well as simple measures for repair and fault
diagnosis, in particular, the replacement of modules and access to hardware set-
tings by means of service commands.
Chapter 4 Contains information on the extension and modification of CMU by installing
instrument software and retrofitting options.
Chapter 5 Contains spare parts lists and exploded views of CMU.
Operating Manual
In the operating manual for CMU basic unit you will find information about the technical specifications
of CMU, the controls and connectors on the front and rear panel, necessary steps for putting the in-
strument into operation, the basic operating concept, manual and remote control.
For introduction typical measurement tasks are explained in detail using the functions of the user in-
terface and program examples.
The operating manual contains all information on the characteristics, operation and remote control of
the CMU including RF and Audio measurements. It further provides hints on preventive maintenance
and fault diagnosis by means of warnings and error messages output by the unit.
Service Manual Modules
The service manual modules is not delivered with the instrument but may be obtained from your R&S
service department using the order number 1100.4903.92.
Service manual modules contains information about the individual modules of CMU. This comprises
the test and adjustment of the modules, fault detection within the modules and the interface descrip-
tion.

CMU Documentation
1100.4903.82 0.2 E-4
Operating Manuals for Digital and Analog Network Tests
The operating manuals listed in the following table describe the test of mobile phones supporting
different standards by means of the CMU200/CMU300 and the appropriate software and hardware
options. Except for hardware-specific chapters that are not relevant to the software options, the net-
work test operating manuals are organized like the CMU operating manual.
For Options
Manual Order Number Type Description Stock No.
Operating Manual
CMU-K21/-K22/-K23 1115.6088.12 CMU-K21 CMU-K22
CMU-K23
GSM900-MS for CMU-B21
GSM1800-MS for CMU-B21
GSM1900-MS for CMU-B21
1115.6007.02
1115.6107.02
1115.6207.02
Operating Manual
CMU-K27/-K28 1115.6688.12 CMU-K27 CMU-K28 TDMA800-MS for CMU-B21 TDMA1900-MS for CMU-B21 1115.6607.02 1115.6707.02
Operating Manual
CMU-K29 1115.6888.12 CMU-K29 AMPS-MS for CMU-B21 1115.6807.02
Operating Manual
CMU-K30/-K31/-
K32/-K33
1115.4185.12 CMU-K30
CMU-K31
CMU-K32
CMU-K33
CMU-K39
CMU-K41
GSM400-BS for CMU-B21
GSM900-BS for CMU-B21
GSM1800-BS for CMU-B21
GSM1900-BS for CMU-B21
MOC/MTC
EDGE for CMU-K30/31/32/33
1115.4004.02
1115.4104.02
1115.4104.02
1115.4104.02
1115.4791.02
1115.4604.02
Operating Manual
CMU-K81/-K82 1115.5581.12 CMU-K81 CMU-K82 CDMA800-MS (IS95) for CMU-B81 CDMA1900-MS (IS95) for CMU-B81 1115.5500.02 1115.5600.02
Operating Manual
CMU-K53 1115.5081.12 CMU-K53 Bluetooth for CMU 1115.5000.02
The GSM base station tests described in operating manual CMU-K30/-K31/-K32 require a CMU300
(Universal Radio Communication Tester for BTS). All other radio communication equipment is tested
with model CMU200.

CMU General
1100.4903.82 1.1 E–4
1 Performance Test
This chapter provides the necessary information for checking the technical data of the CMU. Please
read the general notes on the test procedure on page 1.7 first. Then follows a list of the measuring
equipment required for the performance test; a form for the test report is to be found at the end of this
chapter.
The adjustment of the instrument for restoring the data integrity and the measuring equipment required
for this purpose will be described in chapter 2 of this service manual.
General
The technical data of a CMU can be checked in the following ways:
A) Calibration by an R&S Representative with an ACS Calibration System
Advantages
•Automatic procedure
•Small measurement uncertainties
•Calibration and readjustment
•In most cases, the instrument does not have to leave the country
B) Sending the Instrument to the Factory (Memmingen, Germany)
Advantages
•Automatic procedure at the final test setup
•Minimum measurement uncertainties
•Calibration and readjustment
Necessary Documents
•Operating manual CMU200/CMU300
•Data sheet CMU200
Note: It is recommended to read the following journal on the subjects "measurement uncertainty"
and "tolerance analysis": ETSI Technical Report ETR 028, June 1997

Measuring Instruments and Auxiliary Equipment CMU
1100.4903.82 1.2 E–4
Measuring Instruments and Auxiliary Equipment
Table 1-1 Measuring instruments and auxiliary equipment for manual performance test
Item Type of instrument Required characteristics Appropriate device R & S order
number Use
1 Signal generator 100 kHz to 2.7 GHz,
Generation of a GSM signal
(dummy burst)
SME03
SMIQ 1038.6002.03 RX measurements
2 Spectrum analyzer 100 kHz to 7 GHz,
Demodulation of GSM signals FSE with FSE-B7 FSIQ
FSP–3
1066.30.10.20
1066.30.10.30
1066.4317.02
1093.4495.03
TX measurements
3 Power meter NRVD with sensors
NRV-Z4
NRV-Z51
RX measurements,
TX measurements
4 Power amplifier 100 kHz to 2.7 GHz,
Pout = 100 W RX measurements
5 Harmonics filter attenuate the harmonics of the
power amplifiers to min 30 dBc RX measurements
6 Directional coupler 50 MHz to 2.7 GHz,
up to 100 W RX measurements
7 Network analyzer
or VSWR Bridge 100 kHz to 2.7 GHz ZVR ZRC 1043.0009.61 Reflection coefficient/ VSWR
RF connectors

CMU Measuring Instruments and Auxiliary Equipment
1100.4903.82 1.3 E–4
Test Setups
The quality of the test setup has an effect on the measurement procedures.
Note: Make sure to use only high-quality coax cables and coax connectors as well as calibrated
measuring equipment.
Reference Frequencies
Test setup REF1:
DUT
(CMU)
Spectrum
Analyzer
(FSE
or
FSIQ)
10 MHz Reference Freq.
RF3 OUT
REF1
GEN REFIN
Test setup REF2:
DUT
(CMU)
Spectrum
Analyzer
(FSE or
FSIQ)
10 MHz Reference Freq.
REF OUT 2
REF2
REF IN
TX Level Measurements
Test setup TX1, TX2, TX3, TX4 (depending on level range):
½Normalize spectrum analyzer (FSIQ) to wideband power meter (NRVD) at Max. Level setting of the
CMU (test setups TX1, TX2, TX3).
The attenuator of the spectrum analyzer must be held at this position over 60 dB.
½Normalize spectrum analyzer with preamplifier to spectrum analyzer at last level (test setups TX3,
TX4).
The attenuator of the spectrum analyzer must be held at this position over 60 dB.
DUT
(CMU) NRV-Z51 NRVD
.. +5 dBm
TX1
RF3OUT

Measuring Instruments and Auxiliary Equipment CMU
1100.4903.82 1.4 E–4
DUT
(CMU) NRV-Z4 NRVD
-33 dBm/
-16 dBm
TX2
RF1 /
RF2
DUT
(CMU)
-93 dBm to -33 dBm/
-76 dBm to -16 dBm/
-55 dBm to +5 dBm
TX3
RF1 /
RF2 /
RF3 OUT
FSIQ or FSE
10 MHz Reference Freq.
DUT
(CMU)
RF-PreAmp
36 dB FSE
or FSIQ
-130 dBm to -93 dBm/
-117 dBm to -76 dBm/
-90 dBm to -55 dBm
10 MHz Reference Freq.
TX4
RF1/
RF2/
RF3 OUT
General TX measurements
Test setup TX5:
DUT
(CMU)
Spectrum
analyzer
(FSE or
FSIQ)
10 MHz Reference Freq.
RF1, RF2, RF3
AUX3, pin2 ext. Trigger input
TX5
RX Level measurements
Test setup RX1, RX2 (depending on level range):

CMU Measuring Instruments and Auxiliary Equipment
1100.4903.82 1.5 E–4
Power
Ampl. LPF Power
Splitter
NRV-
Z4 NRVD
DUT
(CMU)
GEN
RX1
depending on max.
level of power splitter
Power
Ampl. LPF
NRVD
DUT
(CMU)
GEN direct. coupl
-30 dB
RX2 NRV-
Z4
General RX Measurements
Test setup RX3:
DUT
(CMU)
GEN
10 MHz Reference Freq.
RF1,RF2,RF4IN
RX3
RX Demodulation Measurements
Test setup RX4:
DUT
(CMU)
GEN
10 MHz Reference Freq.
RF4IN
RX4
Demodulator
(FSE with
FSE-B7 or
FSIQ)
10 MHz Reference Freq.
IF3RX CH1

Tolerance Analysis CMU
1100.4903.82 1.6 E–4
Tolerance Analysis
Due to the small measurement uncertainty of the CMU, the measuring equipment must meet stringent
requirements. Since the measurement uncertainty of the measuring equipment to be achieved depends
on the test setup used, it is recommended to perform a tolerance analysis.
To be able to trace back errors in the measurement, the measurement uncertainty should also be
indicated in the test report.
The tolerances given in the test report refer to the values specified in the data sheet, ie the
measurement uncertainties of the test setup used are to be taken into account as well.
Unless otherwise specified, the specified tolerances are always to be observed.
Note: Please take into account the ETSI Technical Report ETR 028.
The given tolerances refer to CMU data sheet 04/99.