Chapter 1 Overview
Accessories and options
WCDMA Options Version 6.20
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Accessories and options
Your 4400 is a highly integrated test set that allows you to perform most of the
tests and measurements required in a standard production environment already
with its basic configuration. However, there are much more areas of application
for your 4400. It can even be used in R&D, for high-level service or for training
your staff on digital radio systems.
Willtek has developed a broad range of accessories that help you perform specific
tests or measurements, to easily connect mobiles to the 4400 and much more.
Please find below a short overview of the available accessories and options, and
the applications they have been designed for. Should you miss something in the
list below, please check with your local Willtek representative. Due to ongoing
product development and improvement, the turnkey solution to your require-
ment may already be available.
All the latest developments for your 4400 can also be found on the web at
www.willtek.com.
Expanding the 4400’s
measurement capabilities
Audio measurements
In its basic configuration, the 4400 does not support audio measurements. In
order to provide audio functions, you need to install the 4470 Audio Option. It
provides your 4400 with both an audio generator and audio analyzer.
Additional optional features for audio testing are available for the GSM and
GSM/GPRS System Options: The 4471 Basic Codec Option and the 4472 Codec
Extension Option allow you to convert the digital data exchanged between the
mobile and the 4400 into audible sound.
As you know, GSM currently uses three different codecs.
Full Rate is what GSM started with and what is still the most common codec
type. To convert Full Rate into audible sound, the Codec Basic Option is all you
need.
Half Rate is supported by many mobiles, although the network operators are
hesitant to use this feature because they are afraid of loosing subscribers due to
poor speech quality.
NOTE
Specifications are used in this manual for illustration purposes only. There-
fore, the specifications of the product delivered may be different from the
specifications shown here. However, all relevant specifications for the 4400
can be found in the test set’s data sheet. Should that data sheet not be at
your disposal, please ask your local Willtek contact for a copy or feel free to
download it from Willtek’s web site.
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