The CMX148 PMR audio and data processor from CML Microsystems is for half-duplex audio, signalling and data processing.

Available from Solid State Supplies, the device can be used for audio-band processing, filtering, companding, pre or de-emphasis and frequency inversion scrambling.

The CMX148 is suitable for general leisure and professional PMR terminals, particularly those with enhanced MURS/GMRS/FRS with GPS. It features an FFSK/MSK data modem for packetised or free-format data operations. Signal routing and filtering is included to assist host µC based signal encoding/decoding applications.

A DTMF encoder/decoder, a full complement of auxiliary ADCs and DACs and dual synthesised clock outputs are included and the device is available in 48-pin VQFN and LQFP packages.

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