Universal Radio Communication Tester CMU200
THE multi protocol tester for current and future mobile radio networks
◆ Extremely high speed testing
◆ Highly accurate measurements
◆ Modular future-proof design
◆ Comprehensive spectrum analyzer
◆ Fast switching between networks
Testing the 3rd generation
For more than 60 years Rohde&Schwarz
has always been at the forefront of
mobile radio technology. We continue
this tradition of RF test and measurement
with Universal Radio Communication
Tester CMU200. The CMU200 is a third
generation platform design, that offers
true scalable multimode functionality.
CMU200 reflects the long-standing
expertise Rohde&Schwarz has gained in
the world of mobile radio. In recent years,
the company has helped to launch overwhelmingly successful mobile radio systems.
Rohde &Schwarz is a preferred supplier to
many of the leading mobile equipment
manufacturers and is the market leader
for mobile radio test sets.
The CMU200 is part of a complete range
of mobile radio test equipment, encompassing everything from conformance
test systems, to system simulators, turnkey functional board test / final test systems and simple sales counter Go/NoGo
testers.
Low cost of ownership
Selecting the CMU 200 is a decision for
the future and results in a total cost of
ownership which is sure to be among the
lowest due to the following factors:
◆ Completely modular design of hard-
ware and software components
avoids unnecessary investments right
from the start just because there is a
possibility of a feature being needed
sometime in the future. You only pay
for what you need
◆ Should an extension become nec-
essary because your needs widen after some time – the modularity of the
CMU200 concept will cater for that.
Many extensions to the unit may be
installed onsite. You only pay for it
when you need it
◆ The concept allows two complete
channels (RF, signalling and evaluation) to be installed in one CMU200
unit
◆ Maximum production output in a
compact 4-rackunit-height package
with minimum power dissipation allows compact production space layout
◆ With the CMU200 user interface even
less experienced users will intuitively
get it right without the need for extensive training
◆ A new remote interface syntax re-
flects the inherent modularity of this
real multimode tester
The base unit with its standard-independent module test provides many general
purpose measurement facilities for the
development of all kinds of standards
within its wide and continuous frequency
range. If extended by the relevant
options, the CMU200 offers the hardware
and software necessary to handle your
3G, “2.5G“ and previous generation testing applications including analog.
2 Universal Radio Communication Tester CMU200
The CMU200 targets a wide range of applications, but is primarily optimized for the high accuracy
and speed demanded in an ever more quality-conscious manufacturing process. Shown here, the
frontpanel for desktop use.
Applications
•RF development
•Module design
• Module test in production
• Adjustment of mobiles
• Final test in production
• Functional test
• Feature test
• High-end service
• Quality inspections
• Basis for test systems
• Base station simulation
Usability
The CMU200 key strengths
The Radio Communication Tester
CMU200 brings premium cost effectiveness through a variety of features, with
extremely fast measurement speed and
very high accuracy being the two most
important ones. In addition, the secondary remote addressing of the unit's modular architecture makes for intelligent
and autonomous processing of complete
measurement tasks and fast control program design.
Greatest accuracy
In a production environment the unit’s high
accuracy allows DUTs (Device under Test)
to be trimmed for maximum battery lifetime without compromising quality. In the
lab, CMU200 enables the development
engineer to partly replace conventional,
dedicated premium-quality instruments
and save desktop space at the same time.
High precision measurement correction
over the whole frequency and dynamic
range as well as compensation for temperature effects in real time are critical factors
for achieving the CMU200’s excellent accuracy.
The globally standardized Rohde& Schwarz
calibration system can check CMU 200
accuracy in a service center close to you or,
volume permitting, on your site. A worldwide network of these standardized automatic calibration systems has been implemented in our service centers. Highly accurate and repeatable calibration can be performed wherever you are. Your local
Rohde&Schwarz representative offers customized service contracts for the unit. For
large scale users of CMU200 a compact
level verification system is available,
.
addition
in
Thanks to the high resolution of the
extremely bright high-contrast TFT
display even the finest details can be
displayed
Direct branching to all associated menus makes for a
uniquely flat menu structure
Greatest speed
The high processing speed is due to extensive use of ProbeDSP™
measurements and innovative remote
command processing.
◆ ProbeDSP™ technology
The modular architecture relies on
decentralized ProbeDSP™ processing
coordinated by a powerful central
processor. Like an oscilloscope probe,
DSPs dedicated to a specific local data acquisition and evaluation workload help to keep subsystem performance at an uncompromising maximum
even if additional modules are fitted
to the CMU200 mainframe.
◆ Parallel measurements
Several RX and TX measurements can
be performed in parallel. This is
achieved by the fast response of the
CMU200's modular hardware as well
as the high overall processing power
of the unit and the avoidance of bottlenecks by dedicated operation of
technology, parallel
the ProbeDSP™ technology employed. Examples of parallel operation
are measurements of BER and simultaneous Phase/Frequency error, EVM,
Magnitude Error and audio or the
various spectrum measurements.
◆ Innovative remote processing
The novel secondary addressing mode
can address similar functions of each
of the CMU200 subsystems (different
mobile radio standard) in an almost
identical way. Using this type of addressing, new remote test sequences
can be programmed by a simple cut
and paste operation followed by editing specific commands to adapt the
control program to the new application. Secondary addressing is fully
SCPI-compliant which means that a
subsystem address, for example
“WCDMA-FDD“, can be replaced by a
string denoting a different subsystem,
another mobile radio standard.
4 Universal Radio Communication Tester CMU200
As the CMU200 offers many of its measurements in signalling and non-signalling
mode, this easy visual indication of the
signalling state is provided as part of the
status line
This symbol shows the instrument status, i.e. remote or
manual operation
Key advantages of the CMU200
Speed
Greatest reliability
CMU200 employs an ultra effective heat
management between housings and individual components as well as between
heat sinks and the air flow. Together with
the independent cooling cycles for different modules, this adds up to an optimized
cooling system.
The base unit
The base unit without any options
installed can be used for testing general
parameters of 1st, 2nd or 3rd generation
mobile phones. The CMU200 base unit is
the ideal solution for tasks at module
level, i.e. at the early production stages of
all cellular standards.
For increased speed, not
required measurements
can be switched off to
free resources for the
measurements you want
to focus on
Measurements are configured by pressing the
softkey marked with the
yellow triangle two times
Constituent parts of the CMU200 base
unit are the RF generator and RF analyzer
which are complemented by a versatile
network-independent time domain menu
and a comprehensive spectrum analyzer.
As an example power versus time measurement is shown above.
By combining graphical and numerical overview menus the optimal view can be chosen when the CMU200 is in manual mode.
The menu structure of the CMU200 is
very flat and uses context-sensitive selection, entry and configuration pop-up
menus.
Advanced operational ergonomics have
been incorporated into a most compact
and lightweight, 4 rack units high package.
◆ Unrivalled speed of single measurements
Accuracy
◆ Incomparable accuracy
◆ Excellent result repeatability
Modularity
◆ Modular hardware and software concept
provides easy extension to further functionality
Reliability
◆ Extremely low power consumption, and
effective heat conduction result in unparalleled reliability
Future-proof
◆ Easy migration to emerging standards
Universal Radio Communication Tester CMU200 5Universal Radio Communication Tester CMU200 5
Optimized solutions for your production test requirements
Rohde&Schwarz supports CMU200
based production test solutions through a
comprehensive net of application engineering sites. The backbone to this network is the four system integration centers located in Asia, North America and
Europe.
System Integration Services
Regional center project teams offer local
system integration, service and support.
A team of experts is ready to provide turnkey solutions including test case programming. Custom-tailored project solutions and site process optimization are
major aspects of our services. For fully
automated production environments we
offer inline solutions together with our
partners in the field of automation. As an
example a fully automated final test fixture including RF test, audio test, keypad
test and optical inspection is shown on
the picture.
Time to Market
The key to commercial success resides in
the time required to get a new product to
market in large volume. The crucial point
is the fast transition from product development stage to mass production. The
TS7100 Cellular Phone Production Test
Platform featuring the CMU200 meets
this challenge.
TSVP (Test System Versatile Platform)
The
test platform is based on the industry
standard Compact PCI/PXI.
of bus is up to 6 times faster than previous industry bus standards.
CompactPCI frame is 100% compatible to
the industry standard but features 14 up to
31 slots. It comprises a state-of-the-art
controller PC, digital multimeter and
selectable switching and test modules.
each DUT the test hardware for switching
and stimulus functions is implemented as
a dedicated set of modules.
This new type
The TSVP´s
For
The TSVP takes up all modules used for
control and additional measurements.
Off-the-shelf CompactPCI/PXI modules
can be added. Up to 4 sets of modules for
testing DUTs can be inserted. The software can thus simultaneously use the
resources of the parallel instrumentation
to maximize speed in highly automated
production. We can offer optimal configured test systems customized to your production environment.
Test Executive & Generic Test
Software Library Features
The parallel hardware is fully supported
by TestStand, the industry-wide test executive from National Instruments. A userfriendly connection to the available
device drivers has been created to provide faster use of the test executive. This
connection is established by the Generic
Test Software Library (GTSL). At the same
time the toolkit concept provides readyto-run test cases, which can be customized by the user as required.
GTSL in
action
TS7100 Description in Brief
The stringent requirements in the production environment of mobile phones make
it necessary to implement new strategies
in the specification of test systems. The
test system architecture is based on two
CMU200s to provide the optimum
throughput solution.
6 Universal Radio Communication Tester CMU200
TS7100
Example of a
2-channel ultra-
low-profile config-
uration. PSU and
switch matrix fit-
ted to the rear of
rack
TS7100 Features in Brief
◆ High throughput by parallel testing
of cellular phones
◆ All hardware and software components
based on industrial standards
◆ System controller based on
CompactPCI/PXI bus arcitecture
◆ One system for functional board test,
phone calibration and final test
◆ One system for all major cellular phone
standards
◆ Easy expansion to 3rd generation
technologies
◆ Ready-to-run Rohde& Schwarz test
library for immediate use or customization
◆ Provides modular and versatile hardware/
software platform
◆ Reduced costs due to generic concept
Software concept in brief
◆ Software platform based on LabWin-
dows/CVI and TestStand from National Instruments
◆ GTSL includes ready-to-run test cases
for the standards supported by
CMU200
◆ Functional test sequences for RF test,
calibration, signalling test and audio
and acoustic test of mobile phones
are supported
DUT 1
DUT fixtures
• manual
• semi-automatic
• automatic
Blockdiagram
for a 2-channel
configuration
of TS7100
◆ Transparent and open library can be
extended by the user
◆ Operator interface and test cases can
be easily customized
◆ Parallel test of multiple cellular
phones is fully supported
◆ GTSL supports multi-threading and in-
strument sharing if needed
◆ Test development time is reduced by
as much as 80 %
DUT 2
DUT 1
RF 1
Radio Communication Tester CMU200
DUT
channel card
TS-PRL 1
Cellular test
power supply
For more detailed information see separate
data sheet TS7100 (PD 757.5737)
TSVP based on CompactPCI,
controlled by state-of-the art computer
Dedicated
CompactPCI
modules
include …
General purpose
and AF switching
Digital I/O
Power Relays
Digital multimeter
RS-232
GPIB (IEEE 488.2)
Universal Radio Communication Tester CMU200 7
Ready for today‘s networks …
GSM today
Since its introduction in the early nineties, the GSM system has won acceptance and undergone an evolution that no
one could have foreseen.
The applications of the GSM system are
numerous and are currently:
◆ GSM400
◆ GSM850
◆ GSM900 including
– P-GSM (primary GSM)
– E-GSM (extended GSM)
– R-GSM (railway GSM)
◆ GSM1800 (DCS)
◆ GSM1900 (PCS)
Whether the application is in production,
service or development, the flexible concept of the CMU 200 from basic RF signal
generation, frequency, power and spectrum analyzer measurements for alignment of modules in production or development applications, to an instrument
with full GSM-specific signalling in any of
the above-mentioned bands, as well as
module tests on frequencies anywhere in
the range from 10 MHz to 2700 MHz.
Signalling mode
The CMU200 simulates a GSM base station RF interface with the signalling flexibility necessary to test the behaviour of
the mobile under the influence of different signalling parameters. These parameters are normally set by the network operator but can be reproduced by the
CMU200 for test purposes. The unit supports the latest fast location update and
direct paging features.
8 Universal Radio Communication Tester CMU200
Reduced signalling synchronized mode
The CMU200 provides the same functionality as in the Signalling mode, but discards any signalling reaction from the
mobile connected. This mode of operation enables both testing of modules that
only have layer 1 operation and very fast
RF testing in production environments. It
can also skip the location update procedure in order to save time.
Non-signalling mode
This mode serves for generating a signal
with GSM-specific midambles and modulation in the entire frequency range from
10 MHz to 2.7 GHz. The analyzer offers
the same flexibility for GSM-specific
transmitter measurements such as
◆ modulation analysis
◆ average and peak burst power
◆ power versus time, power versus slot,
power versus frame
◆ spectrum due to switching /modula-
tion
GSM development
As an all-round tool for GSM development
engineers, the CMU 200 is an unsurpassed solution. The RF interface provides four input and output connectors
offering a wide range of signal levels for
generation and analysis of RF signals.
Input only, as well as combined input/
output connectors, can analyze mobiles
or modules with a sensitivity down to
dBm and up to +47 dBm for the power
meter. RF signals can be generated with
levels from
depending on the selected connector. All
measurement tolerances are set by
default according to the GSM 11.10 and
GSM 05.05 recommendations but may of
course be altered to suit individual needs.
−130 dBm up to +13 dBm,
−80
Production of mobile phones
Production is a process that calls for cost
effectiveness. The CMU200 concept is
optimized for IEC/IEEE-bus speed, measurement accuracy and reproducibility as
well as cost of ownership. Thanks to the
multitasking feature and parallel measurements, previously unobtainable test
times can be achieved.
The ability to process BER data and perform transmitter measurements at the
same time, allows phase / frequency
error, power versus time and average
power (PCL accuracy) to be measured
during the time-consuming receiver test.
The accuracy and reproducibility ensure
correct and steady measurement results
and thus contribute to the quality and
reliability of the end product.
GSM Evolution – 2.5G
The amount of data transfer in GSM networks is growing rapidly. Multislot applications such as HSCSD or GPRS together
with the innovative 8 PSK modulation
scheme EDGE are needed to cater for the
evolving data traffic. The CMU200 platform is not only able to meet today’s
standards and systems but is also
designed for the needs of tomorrow.
Multislot
In the future, mobile phones will be able to
use several timeslots simultaneously for
data transmission and reception to further
increase the data rate. The simultaneous
transmission and reception of several
timeslots (multislot) is the technological
challenge for circuit-switched and
packet-switched applications. The
following extensions of the GSM
single-slot measurements enable
maximum flexibility in development, and, due to minimum measurement times, maximum throughput in production.
◆ Individual levels for all time-
slots used in the down link
(DL). The CMU generates up to
eight timeslots per frame in
the down link; each timeslot
can be assigned a separate
level. The excellent level stability of the CMU200 generators
is not impaired by multislot
transmission using different
levels, and allows the most accurate measurements of receiver sensitivity (BER/DBLER).
◆ Transmitter and receiver meas-
urements are possible on every timeslot used. The new multislot concept allows independent measurements on
any timeslot (TS 0-7) and thus
covers the current and future
multislot combinations without restrictions.
◆ Power-versus-time measure-
ment (graphical display) for up
to four timeslots in the UL. The
templates of this application
are evaluated independently
for each timeslot - in line with
standards and according to
recommendations. Both
GMSK- and 8PSK-modulated
signals are recognized, and
the templates of the relevant
timeslot are set in realtime.
Multislot measurements are
required for HSCSD and ECSD technologies as well as for GPRS and
EGPRS.
GSM-specific
non-signalling
test provides generation and analy-
sis of RF signals
for testing of RX/
TX modules or
mobiles in service
mode
The overview
menu provides
fast comprehensive information
on the mobile’s
RF performance.
The hotkeys at the
bottom of the
screen give
immediate access
to specific and
detailed GSM
measurements
In the GSM non
signalling func-
tion groups the
possibility to
switch between
GMSK and 8PSK
(EDGE) is already
implemented.
Thus EDGE bursts
as shown here
can easily be ana-
lyzed
Universal Radio Communication Tester CMU200 9
8PSK modulation – EDGE
8PSK is besides multislot a further step
towards increasing the mobile radio data
rate. By using the available GSM frame
structure, the gross data rate is three
times that obtained with GMSK. The
CMU200 can already perform 8PSK on
GSM bursts and analyze them thanks to
advanced measurement applications.
Error vector magnitude and magnitude
error have been added to the range of
modulation measurements. New templates for power-versus-time measurements ensure compliance with the specifications, as do the modified tolerances
for spectrum measurements. 8PSK will
transform HSCSD technologies into ECSD
and GPRS into EGPRS. As with all measurements provided by the CMU200, special attention has been given to achieving
maximum measurement accuracy and
speed for EDGE too.
GPRS/EGPRS
Thanks to the new, future-oriented
method of packet data transmission, the
radio resources of existing GSM mobile
radio networks can be utilized efficiently
for data services. As with circuit-switched
services, GPRS will also use a combina-
In the 8PSK mode the modulation analysis is subdivided. The error vector magnitude, the magnitude
error and the phase error can be displayed both numerical as shown above, or graphical.
tion of several timeslots (multislots) and
higher-level modulation in the form of
8PSK (EGPRS) to push up the data rate.
The introduction of packet-oriented transmission and the associated temporary
assignment of radio resources require
new test concepts. The CMU 200 provides the following test modes:
◆ ETSI Test Mode A: In test mode A, the
mobile is induced to continuously
transmit the associated UL timeslots.
The CMU 200 can carry out all TX
power ramp measurement of up to
four adjacent timeslots simultaneously, or modulation and spectrum measurements.
◆ ETSI Test Mode B: Test mode B cre-
ates a loop back in the telephone so
that the mobile retransmits data
blocks received from the CMU 200. In
addition to the measurments available in the ETSI test mode A, test mode
B enables bit and block error rate
measurements (BER/DBLER).
measurements available, such as the
GSM specifications – Mobile station test
RF generator
Modulation GMSK, BxT = 0.3
Frequency range
GSM 400 band 460 MHz to 468 MHz / 488 MHz to 496 MHz
GSM850 band 869 MHz to 894 MHz
GSM900 band 921 MHz to 960 MHz
GSM1800 band 1805 MHz to 1880 MHz
GSM1900 band 1930 MHz to 1990 MHz
Attenuation of inband
spurious emissions
Inherent phase error (GMSK)
Inherent EVM (8PSK)<2%, rms
Frequency settling time
Output level range (GMSK)
RF1
RF2
RF3OUT
10 Universal Radio Communication Tester CMU200
8PSK
>50 dB
<1°, rms
<4°, peak
<500 µs to res. phase of 4°
−130 dBm to −27 dBm
−130 dBm to −10 dBm
−90 dBm to +13 dBm
Output level range (8PSK)
RF1
RF2
RF3OUT
Output level resolution 0.1 dB
Output level uncertainty
RF1, RF2
>–117 dBm
RF3OUT
−90 dBm to +10 dBm (GMSK)
−90 dBm to +6 dBm (8PSK)
−130 dBm to −31 dBm
−130 dBm to −14 dBm
−90 dBm to +9 dBm
+23°C to +35°C
<0.5 dB <0.7 dB
<0.7 dB <0.9 dB
+5°C to +45°C
RF analyzer
Frequency range
GSM 400 band 450 MHz to 458 MHz / 478 MHz to 486 MHz
GSM850 band 824 MHz to 849 MHz
GSM900 band 876 MHz to 915 MHz
GSM1800 band 1710 MHz to 1785 MHz
GSM1900 band 1850 MHz to 1910 MHz
Measurement bandwidth
in measurement menus 500 kHz
The Power-versus-Time Multislot application can graphically display up to 4 adjacent timeslots, automatically detects GMSK- and 8PSK-modulated signals and activates the associated templates in realtime. A new zoom function allows full-screen display of each slot.
Reduced signalling synchronized mode
Extremely fast adjustment and testing of
RF parameters during GPRS mobile
phone production is ensured by deactivating the GPRS protocol stack. Without
using the higher protocol layer (RLC/MAC
layer), the CMU 200 synchronizes the
mobile (camping), the data channel
(PDCH) is then set up directly.
The GPRS and EGPRS data coders are
already available to determine Bit Error
Rates (BER) and Data Block Error Rates
(DBLER).
GSM highlights of CMU200
Benchmark-breaking IEEE-bus speed due to
◆ Parallel measurements
◆ Secondary addressing
◆ Optimized processing power
High flexibility for R&D
◆ Assignment on up to 8 DL slots (TS 0 to 7)
◆
Tx/Rx on any transmit slot
◆
Individual level generation on any used DL
slot
GMSK/8PSK Measurements
◆ Phase/frequency error, EVM, magnitude
error, origin offset, I/Q imbalance for I/Q
modulator tuning
◆ Power vs time
◆ On up to 4 UL slots
◆ normal/access
◆ Peak power/average, power vs frame,
power vs slot
◆ General spectrum measurements
◆ Timing error
◆ BER/DBLER, RBER/FER, FastBER
◆ Power vs PCL (on 3 or 7 channels)
Power meter (frequency-selective)
Level range
RF1
continuous power
Peak Envelope Power
RF2
continuous power
Peak Envelope Power
RF4IN (continuous power and PEP)
Level uncertainty
RF1, RF2, RF4IN
in temperature range +23°C to +35 °C
in temperature range +5°C to +45 °C
Level resolution 0.1 dB (0.01 dB via remote control)
1)
2)
(PEP) +53 dBm (200 W)
2)
(PEP) +39 dBm (8 W)
−40 dBm to +47 dBm (50 W)
−54 dBm to +33 dBm (2 W)
−80 dBm to 0 dBm
<0.5 dB
<0.7 dB
Modulation analysis
Level range (PEP)
2)
RF1
2)
RF2
RF4IN
1)
50 W from +5 °C to +3 0 °C, line ar de grad atio n dow n to 2 5 W at 45 °C.
2)
Mean value of power vs time must be equal or less than allowed continuous power.
−6 dBm to +53 dBm
−20 dBm to +39 dBm
−60 dBm to 0 dBm
Inherent phase error (GMSK) <0.6°, rms
Inherent EVM (8PSK) <1,0 %, rms
Frequency measurement uncertainty
<2°, peak
≤10 Hz + drift of time base
Burst power measurement
Reference level for full dynamic range (GMSK, low noise mode)
2)
RF1
2)
RF2
RF4IN
Dynamic range (GMSK) >72 dB (BW=500 kHz, rms)
Reference level for full dynamic range (8PSK, low noise mode)
2)
RF1
2)
RF2
RF4IN
Dynamic range >69 dB (BW = 500 kHz, rms)
Relative measurement uncertainty
> −40 dB <0.1 dB
Result
−60 dB ≤result≤−40 dB <0.5 dB
Resolution 0.1 dB in active part of burst
+10 dBm to +53 dBm
−4 dBm to +39 dBm
−22 dBm to 0 dBm
+6 dBm to +49 dBm
−8 dBm to +35 dBm
−26 dBm to –4 dBm
Universal Radio Communication Tester CMU200 11
TDMA in CMU200
The need for higher data rates is the trend
in our information-oriented society in the
new millennium. The enhancement of
mobile phones takes this need into
account on the way to the next generation of wireless communication. Need to
test these future improvements?
CMU200 does it all. The TDMA part takes
care of your requirements to cope with
this fast progressing mobile technology.
The CMU200 concept with its multistandard platform architecture provides for further extensions such as Bluetooth and
cdma2000.
TDMA
The wide acceptance of TDMA (IS-136) is
based on a very flexible and powerful
technology as well as on its compatibility
with AMPS, which is widespread and one
of the major wireless communication
standards. Derived from analog AMPS,
the TDMA standard is now ready for a
step-by-step evolution into the third generation of mobile technology. This fact
shows the need for a test instrument that
is flexible enough to cover all future
needs as well as the current standards.
For TDMA (IS-136) signalling functionality, the CMU200 requires the versatile signalling unit (CMU-B21) as well as the
software option CMU-K27 for the cellular
band or CMU-K28 for the PCS band.
Due to the highly user-friendly menu concept, the CMU200 provides quick access
to all measurements desired, optimizing
handling and consequently efficiency.
Signalling mode
The CMU200 simulates a TDMA basestation RF interface including the signalling protocol so that a mobile can be
tested with regard to different signalling
parameters. All necessary network and
base-station parameters can be set, such
as control and traffic channel configuration, neighbouring channels setup etc.
You can also generate a MAHO report.
Non-signalling mode
The non-signalling mode is for generating
and analyzing TDMA (IS-136) signals
within the frequency range from 10 MHz
to 2.7 GHz. CMU200 provides TDMA-specific measurements such as:
◆ Power
◆ Modulation
◆ Spectrum
◆ Power versus time
◆ BER
TDMA (IS-136) development
With its great versatility the CMU 200 is
the most suitable tool for the development of mobile phones. Four configurable
RF connectors are provided to enable
flexible signal generation and analysis.
The power meter can evaluate signals
within a range from
47 dBm, whereas the generator outputs
signals from
−130 dBm to +13 dBm. The clearly struc-
tured and user-friendly menu design
together with the clear-cut screen layout
provides quick access to all features and
ensures trouble-free monitoring of the
device under test.
−80 dBm to+
Quality assurance
Due to its high measurement repeatability and accuracy, the CMU200 is the
right choice to ensure a consistently high
quality standard from production. TDMAspecific measurements such as BER, Error
Vector Magnitude (EVM) and EVM10,
where only the first 10 symbols are taken
into account, provide an excellent test
platform to guarantee the production of
high-quality devices.
Production of mobile phones
The production of mobile phones requires
time-efficient and cost-effective means
that ensure both high throughput and
state-of-the-art accuracy. Thanks to the
unique IEC/IEEE-bus concept of the
CMU200, these two goals can be easily
achieved in your production line. The
intelligent handling of the received GPIB
commands optimizes the measurement
speed for all TDMA-specific measurements. In practice, this will mean drastically enhanced test time and test yield.
Acoustic Measurements
The newly implemented ACELP speech
coder is able to encode and decode real
audio signals and allows you to use the
CMU200 also in real acoustic measurement applications. Equivalent to the GSM
implementation of the CMU200 the
TDMA speech coder provides analog
inputs and outputs and a connector for an
external handset. The speech coder
requires the hardware option CMU-B52
and can also be combined with the internal Audio Analyzer/Generator option
CMU-B41.
12 Universal Radio Communication Tester CMU200
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