Chapter 1 Overview
About the 4400
2 WCDMA Options Version 6.20
About the 4400
The Willtek 4400 Mobile Phone Tester Series has been designed to meet the
needs and requirements of service, manufacturing, quality assurance and engi-
neering facilities. For all these areas, accuracy is the key and the 4400 provides
exceptional value (superb VSWR and accuracy). For manufacturing, speed is an
additional key requirement.
The 4400 features two different operating modes: The synchronous mode (call
mode) provides call processing with multiband handovers for fast measurements
in different frequency bands. The asynchronous mode (non-call mode) is dedi-
cated to the board-level alignment, providing generator and analyzer capabili-
ties.
The 4400 series of products provides solutions for:
– CDMA, AMPS (CDMA2000 1xRTT System Option),
– GSM (GSM System Option),
– HSCSD (with Multislot HSCSD Option),
– GPRS (GSM/GPRS System Option),
– EGPRS (EDGE System Option),
– WCDMA/UMTS (WCDMA Non-Call Mode Option, WCDMA Call Mode
Option),
– TD-SCDMA (TD-SCDMA Non-Call Mode Option).
The built-in programming tool RAPID! allows for easy test automation. Default
standard test routines are already stored on the machine, and more enhanced
sequences are available (as options).
RAPID! even allows for data input from bar code readers or the control of other
external devices. For example, the ability to send AT commands to a cellular
phone enables completely automatic testing. Results can be easily documented
through screen dumps to an attached printer or file storage. The numerical data
of graphs can be read out via GPIB or written to a floppy disk.
Since requirements for the different application areas are different, the 4400
provides a wide range of various options:
The Audio Option allows for acoustical measurements and supports dedicated
vocoders (speech codecs).
The Power Supply Option works as a battery replacement for terminals.
The Current Measurement Option allows for easy calculation of standby or talk
times.
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