附加的功能：
R＆S CMD55能够测试GSM1800（以前称为PCN或DCS1800）和GSM1900（以前称为PCS或DCS1900）手机。该模型将小尺寸与高测量精度和速度结合在一起。测试仪的功能范围包括验证DUT（被测器件）正确运行所需的所有信号，发生器和测量功能。
凭借其快速的通过/不通过测试以及使用可选扩展的准确分析，CMD55同样适用于研发，生产以及高端服务和生产。基于Rohde＆Schwarz在数字无线电通信测试中的广泛专业知识（尤其是在开发类型认证测试系统（例如GSM900和GSM1800系统模拟器）中获得的知识），CMD模型是目前的顶级测试器和未来的测量应用。
CMD55是罗德与施瓦茨公司的通信分析仪。通信分析仪是用于物理层，电路和新技术测试的高级电子测试设备。测试数据网络的任何人都可以使用通信分析仪来测量和监视设备。
Additional Features:
The R&S CMD55 is capable of testing GSM1800 (formerly named PCN orDCS1800) and GSM1900 (formerly named PCS or DCS1900) mobile phones. This model combines small dimensions with high measurement accuracy and speed. The testers range of capabilities includes all signaling, generator and measurement functions required for verifying the correct operation of the DUT (Device Under Test).
Thanks to its fast go/nogo tests and accurate analysis using optional extensions, the CMD55 is equally well suited for R&D, production and high-end service and production. Based on the wide-range know-how of Rohde & Schwarz in digital radiocommunication testing, which not least was obtained in developing type-approval test systems such as the GSM900 and GSM1800 system simulators, the CMD model is a top-grade tester for present and future measurement applications.
The CMD55 is a communication analyzer from Rohde & Schwarz. A communication analyzer is a superior type of electronic test equipment for physical layer, circuit, and new technology testing. Anyone in the business of testing data networks can use a communication analyzer for the measurement and monitoring of equipment.
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