Searching for ways to improve throughput in the production of mobile phones seems to be heading for complete avoidance of signalling in the production test. In pursuit of this trend, Universal Radio Communication Tester R&S CMU200 provides comprehensive options in two operating modes for GSM measurements without signalling: unsynchronized measurement in the functional group "GSM non-signalling" and synchronized measurement with disabled signalling in the functional group "GSM signalling".
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