Shanghai, China and Ismaning, Germany.Targeting The People's Republic of China's future wireless 3G (third generation) TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) standard, test-and-measurement house Willtek Communications announces an option for its existing 4400 Mobile Phone Tester Series.
The option is designed to speed up integration testing and production of TD-SCDMA cellphones. In January, the Ministry of Information Industry of the People's Republic of China formally announced TD-SCDMA as the country's standard 3G mobile telecommunication technology. TD-SCDMA can also be deployed in wireless PDAs (personal digital assistants) and PC cards.
Axing Western Standards
Promoted in China by CATT (Chinese Academy of Telecommunications Technology), the Chinese Datang Telecom Technology Co., and Germany-based Siemens AG, TD-SCDMA is an attempt to develop a phone system that's independent of Western technology.
This is oestensibly being pursued to avoid possible payment of patent fees to US Qualcomm and UMTS (Universal Mobile Telecommunications System) developers. TD-SCDMA is partially based on spread-spectrum CDMA.
TD-SCDMA cellphones are expected to become available shortly, with other 3G networks delayed until TD-SCDMA is ready. The standard has also been adopted by 3GPP (Third Generation Partnership Project), and is called the UTRA TDD 1.28Mcps Option.
One Platform Fits All Hat Sizes
Willtek's TD-SCDMA test capabilities for functional tests and alignment are now being offered on the company's 4400 Mobile Phone Tester platform. It's shown here:
The 4400 also covers all other major wireless standards, including GSM, GPRS, EDGE, WCDMA, CDMA2000, and 1xEV-DO.
Since Chinese manufacturers produce phones for countries applying these multiple standards, testers need to accommodate them. Moreover, the Willtek 4400 can be switched between different 2G (second generation) and 3G wireless technologies.
Pre-Ship Functional Testing
Willtek's TD-SCDMA Call Mode Option complements the non-call mode option for the 4400 Mobile Phone Tester Series. These products thereby integrate all functions necessary to calibrate transmitter and receiver sections of a phone, performing functional tests, and carrying out final testing prior to shipment.
"The 4400 with TD-SCDMA option will not only be cheaper, but also much faster than most rack-and-stack equipment currently being used by many integration teams," avows Matthias Weber, Director of Product Marketing at Willtek Communications. "What's more," says Weber, "the call-mode option comes right in time before the start of TD-SCDMA phone mass production."
Weber notes that Willtek's support team in Shanghai has already helped a number of developers in China, with backup from an R&D team in the firm's German headquarters.
The 4400 with TD-SCDMA supports the call setup and all important transmitter and receiver measurements for validation, functional testing, and calibration. Measurements include peak power and average power, open loop and inner loop power, EVM (error vector magnitude), frequency error, and peak code domain power. The instrument can also display spectrum, constellation, BER (bit error rate), and BLER block error rate).
The 4400 can also ease successful interoperability tests. Major signaling functions are based on the Datang protocol stack, while other protocol parts have been developed in cooperation with BUPT (Beijing University of Posts and Telecommunications).
The 4400 with the TD-SCDMA options and fast power measurements, lets production sites use it to align a phone's transmitter. It does that rapidly, increasing production throughput and quality of devices. Willtek contends the system provides vendors with low total test cost-per-wireless device.
And, as all major cellular standards are available on the 4400 Series, it promises to drastically reduce production downtime; one test station can switch from one technology to another.
For more details contact Willtek Communications GmbH, Gutenbergstr. 2-4, 85737 Ismaning, Germany. Phone: +49 (0)89 99641 200. Fax: +49 (0)89 99641 440.
Willtek Communications, +49 (0)89 99641 200, www.willtek.com