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Categories: Analyzers, Communication Analyzers
Model: CMD80
Condition: Used
Seller: Valuetronics International Inc
Rohde amp; Schwarz CMD80 The CMD80 is a communication analyzer from Rohde amp; Schwarz. A
The CMD80 is a communication analyzer from Rohde amp; 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.
Rohde & Schwarz, a world market leader in mobile-radio measurements, and its US partner company Tektronix have jointly developed a mobile-phone tester for the US mobile-radio system CDMA to IS95 standard: Digital Radiocommunication Tester CMD80. It also incorporates the technology needed for measurements in the predecessor analog AMPS network, which is still in use. CMD80 measures the RF and AF parameters of mobile stations supporting both standards or dual-mode equipment in development, production and service with the aid of network-specific signalling. It covers the 800-MHz band (cellular radio mobiles for CDMA and analog AMPS), the 1900-MHz band (PCS mobiles for CDMA, PCS = personal communication system) and the 1700-MHz band for the Korean variant of CDMA.
Measurements are based on ultramodern digital signal processing. The results are thus available within the shortest possible time, which means an enormous benefit in speed-dictated mass production. DSP technology has two important benefits: measurement functions can be enhanced by software upgrades and new measurement techniques can be added solely by software modifications. The individual measurements for the various standards are derived directly from the relevant specifications and are preconfigured. Measurements can thus be performed without in-depth knowledge of the relevant network.
Basically, CMD80 provides two different measurement modes for each network. Measurements can be performed either as a module test (ie without call setup to the DUT) or as a manual test with full signaling. In the latter case a call setup for performing the measurement can be made both from the base station (which is simulated by the CMD80) and from the mobile. In this mode it is also possible to set up a call with voice loopback. The audio data picked up by the microphone of the mobile phone are buffered in the CMD80 and reflected to the mobile under test after a delay of about two seconds. In this way speech quality of the DUT can be verified.
In the signaling mode, implicit hand-offs can be made within the same standard (ie a D-AMPS handoff to another digital traffic channel – a new channel number – or changeover to another timeslot at the same TDMA frequency) as well as handoffs to other standards, if defined. This is an important criterion for testing multimode/ multiband mobile phones. The measurements themselves are adapted to the relevant transmission standard.
The following CMD80 specifications are for CDMA communications only.
Signal Generator
Analyzer
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Rohde amp; Schwarz CMD80
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