Test & Measurement
Application Card | 01.00
Analog and digital audio measurements
with the R&S®CMW
Analog and digital
audio measurements
with the R&S®CMW
The R&S®CMW-B400B audio board offers
the flexibility to measure and quantify audio
applications with the R&S®CMW270/280/500
radiocommunication testers.
Your task
Today’s mobile devices feature multimode connectivity.
The complex chipsets containing 2G, 3G, LTE, WLAN,
Bluetooth, NFC, GPS, FM stereo and more have to be test-
ed and measured – quickly, accurately and reliably. The use
of digital audio signals is also becoming more widespread.
During chipset development, even simple audio signals
have to be tested and measured. In mass production it is
mandatory to perform testing with a single-source tester in
order to reduce test times to an absolute minimum. On the
bench or in a test system, accuracy and versatility are key
requirements for an audible difference in your end product
and for customer satisfaction – a difference that sets you
apart from the competition.
T & M solution
At its core, the R&S®CMW-B400B audio board is a com-
prehensive and powerful audio signal generator and audio
signal analyzer in one, both for analog and digital signals.
The product has been designed to quickly and easily per-
form accurate standard audio measurements.
The architecture makes the most of the ever increasing
processing and multitasking capabilities to measure many
parameters simultaneously and therefore faster. The audio
board is highly programmable – ideal for production test
automation and specialized custom audio analysis. All
measurements are dual channel and dual domain, and the
signal generator can be split to allow different functions on
each channel. The signal generator has two independent
channels and generates signals in the analog and digital
domains simultaneously.
Two-channel level and frequency measurements are con-
tinuously available in the signal analyzer from either do-
main. The analyzer also offers a two-channel continuous-
time measurement function and up to two two-channel,
FFT-derived measurements.
The audio board is a multipurpose, precision audio signal
generator and analyzer that helps to automate proof-of-
performance measurements and equipment maintenance.
Unique features make it the ideal instrument for engineers,
and service professionals. The R&S®CMW-B400B audio
board can also be extended to include various types of
speech codecs.
Realtime vocoder functions for circuit-switched voice calls
in GSM, WCDMA and CDMA2000®1x can be used with an
external audio analyzer such as the R&S®UPV to execute
audio certification tests in line with GCF, PTCRB und CCF.
Tests for voice over IP multimedia subsystem (IMS) in the
LTE network can also be performed.
These functionalities require that the R&S®CMW-B405A
speech codec option is installed on the R&S®CMW-B400B
audio board.
R&S®CMW-B400B audio board
with R&S®CMW-B405A speech
codec option installed.
CMW-B400_audio_ac_en_3606-8589-92.indd 1 11.06.2013 17:12:31
Rohde & Schwarz GmbH & Co. KG
Europe, Africa, Middle East | +49 89 4129 12345
customersupport@rohde-schwarz.com
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customer.support@rsa.rohde-schwarz.com
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China | +86 800 810 8228/+86 400 650 5896
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www.rohde-schwarz.com
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG
Trade names are trademarks of the owners | Printed in Germany (as)
R&S®CMW-B400B | PD 3606.8589.92 | Version 01.00 | June 2013
Data without tolerance limits is not binding | Subject to change
© 2013 Rohde & Schwarz GmbH & Co.KG | 81671 München, Germany
3606858
992
The R&S®CMW-B400B is suitable for applications such as
analog and digital chipsets, module design, nonwireless
and wireless, consumer electronics audio and much more.
Its accuracy and versatility in the test environment will
help you make an audible difference in your end product.
See also:
www.rohde-schwarz.com/technologies
www.rohde-schwarz.com/product/CMW
Customer benefits
The R&S®CMW-B400B audio board contains the full
functionality of analog and digital domain audio mea-
surement. It adds versatile and high performance audio
measurement and analysis to the capabilities of the
R&S®CMW270/280/500 radio communication testers.
The R&S®CMW-B400B audio board offers the following
features:
❙ The combined functionality of a distortion meter
(THD ratio and level, THD+N ratio and level),
SNRmeasurements, frequency counter, AC voltmeter,
DCvoltmeter and FFTanalyzer with a low-distortion
audio source
❙ Weighting functions and standard fi lters with various
settings (LP, BP and HP)
❙ The fl exibility to measure and quantify both analog and
digital audio applications
❙ Multitone measurements: up to 20 distinct test tones can
be predefi ned and analyzed
The Bluetooth® word mark and logos are registered trademarks owned by
Bluetooth SIG, Inc. and any use of such marks by Rohde & Schwarz is under license.
CDMA2000® is a registered trademark of the Telecommunications Industry
Association (TIA-USA).
Measuring audio parameters of a mobile device
FFT noise measurementsMulti-tone measurementsMeasurement summaries
Measuring audio parameters of a mobile device with
the R&S®CMW500 radio communication tester and the
R&S®CMW-Z10 RF shield box with R&S®CMW-Z11
antenna coupler and R&S®CMW-Z15 audio kit.
CMW-B400_audio_ac_en_3606-8589-92.indd 2 11.06.2013 17:12:33