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AN1998
An FM/IF system for DECT and other high-speed GFSK
applications
Rev. 3 — 24 July 2014 Application note
Document information
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Keywords High-speed digital wireless PCS applications, Digital European Cordless
Telephone (DECT), FM/IF system
Abstract An NXP low-voltage high-performance monolithic FM/IF system, the
SA639 is introduced to meet the increasing demand for high-speed digital
wireless PCS applications. In order to assist the system design, a
SA639-based performance evaluation board has been developed
according to the Digital European Cordless Telephone (DECT)
specifications. This application note presents detailed descriptions of the
SA639 FM/IF system, evaluation board, and design information including
circuit diagram, component list, and the board layout. The experimental
performance evaluation procedures, measured bit error rate (BER),
sensitivity to frequency offset, and sensitivity to FM deviation variation of
this system are also presented. Results indicate that the low-voltage
SA639 FM/IF system provides superior performance for high-speed digital
wireless applications.
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