Test and Measurement News
FM Stereo Multiplex Generation with dScope III Audio AnalyzerCambridge, UK - April 2006: Prism Sound has announced a FREE downloadable script for its dScope Series III audio analyzer, which will aid in testing FM radio receivers and transmission systems.
The Visual Basic script generates a multi-tone stimulus encoded as an FM stereo multiplex (MPX) signal, enabling ultra-fast simultaneous measurement of signal level, distortion, signal-to-noise-ratio, frequency response and crosstalk at the output of the receiver under test.
In addition, an RDS sub-carrier can be included in the MPX, carrying basic information such as 'Program Service Name' for RDS decoder testing.
The script can be modified by the user to customise test frequencies, RDS content etc.
The script and an explanatory application note are available at www.prismsound.com
Launched in 2002, Prism Sound's compact and cost effective dScope III is suitable for a wide range of digital and analogue audio applications and is used in many market sectors including broadcast, multimedia, CD, DVD, computer audio, transducer, digital telephony and communications. It is comprehensive and accurate for R&D applications, portable and intuitive for maintenance or field service and fast, automatic and IT-friendly for the production line.
As well as covering the traditional audio test functions, dScope incorporates many important new features needed to work with the latest audio technologies. These include digital interface test tools such as carrier waveform and eye-pattern display, jitter measurement and AES3/IEC60958 channel status generation and analysis as well as support for higher sampling rates. dScope has a uniquely simple, state-of-the-art synchronous multi-tone capability, which can measure dozens of parameters simultaneously.
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