Telit Wireless Solutions GM862-GPS Manuale Utente Scaricare il pdf (Pagina 25)

GM862-GPS Hardware User Guide

1vv0300728 Rev. 0 - 27/04/06

5 Audio Section Overview

The Base Band Chip of the GM862-GPS Telit Module provides two different audio blocks; both in

transmit (Uplink) and in receive (Downlink) direction:

“MT lines” should be used for handset function,

“HF lines” is suited for hands -free function (car kit).

These two blocks can be active only one at a time, selectable by AXE hardware line or by AT

command.

The audio characteristics are equivalent in transmit blocks, but are different in the receive ones and

this should be kept in mind when designing.

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Telit Wireless Solutions GM862-GPS Manuale Utente Pagina 25