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Chapter 8, Signaling Decoder Screen
NMT Decoder
NMT Decoder
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The NMT Encoder and Decoder work together to test Nordic Mobile Telephone
equipment used in a number of countries using different NMT standards. As each
standard is selected, the Test Set configures the encoder and decoder to create and
measure the corresponding RF carrier and digital data structure.
The following terms are used throughout the NMT sections of the manual:
DUT - Device-Under-Test: The device being tested (MS, BS, or MTX).
Frames - Groups of digital information that comprise an NMT signal. (This manual as-
sumes you understand the frame structure for the signals you need to create or analyze;
any frame information provided is for reference purposes.)
MS - Mobile Station: The equipment used by a mobile subscriber.
BS - Base Station: The unit that provides the radio interface between one or more Mo-
bile Stations and the Mobile Telephone Exchange.
MTX - Mobile Telephone Exchange: The unit that provides the interface between one or
more Base Stations and the telephone network.
Standard - The set of frequency and data format standards used by different countries.
The NMT Decoder screen is used to load and run NMT test programs you create.
The programs are used to transmit NMT-encoded signals to a device, and to
evaluate received NMT signals.
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