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Copyright 2005© Siemens AG
Page 15 of 37
Service Repair Documentation
Level 2.5e – C75
Release 1.0
4.7 Antenna switch (electrical/mechanical)
Internal/External <> Receiver/Transmitter
The C75 mobile have two antenna switches.
a) The mechanical antenna switch for the differentiation between the internal and
external antenna.
b) The electrical antenna switch, for the differentiation between the receiving and
transmitting signals.
To activate the correct tx pathes of this diplexer, the SGOLDlite signals RF_FE_DTR_GSM
and RF_FE_DTR_DCS are required.
Internal/External antenna switch
The electrical antenna switch
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