Siemens TC35i - Manual (Page 15)

TC35i Terminal Hardware Interface Description
Confidential / Released
TC35i_T_HD_v01.05 Page 15/37 10.07.2003
3.3 The TC35i GSM engine
The TC35i GSM engine is a major functional component of the TC35i Terminal that handles
all the processing for audio, signal and data within a GSM cellular device. Internal software
runs the application interface and the whole GSM protocol stack. A UART forms the
interface to the Terminal Circuit.
A GSM baseband processor contains all analog and digital functionality of a cellular radio.
Designed to meet the increasing demands of the GSM/PCS cellular subscriber market, it
supports FR, HR and EFR speech and channel coding without the need for external
hardware.
The RF part of the GSM engine TC35i is based on a highly integrated single transceiver chip
solution.
The internal antenna cable connects to the connector type GSC from Murata with a 50Ω
impedance. This GSC connector is the ARP (Antenna Reference Point) for type approval
measurements as well as for electrical characteristics.
Figure 2: TC35i GSM engine