Company Confidential
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Com
Copyright 2005© Siemens AG
Page
19
of
53
TD_Repair_L2.5_A70_A75_R1.0.pdf Release
1.0
6.7 Antenna switch (electrical/mechanical)
Internal/External <> Receiver/Transmitter
The A70 mobile have two antenna switches.
a)
The mechanical antenna switch for the differentiation between the internal and
external antenna which is used only for RF adjustments on the board.
b)
The electrical antenna switch, for the differentiation between the receiving and
transmitting signals.
To activate the correct tx pathes of this diplexer, the EGOLDlite signals
RF_FE_DTR_GSM
and
RF_FE_DTR_DCS
are required.
Internal/External antenna switch
to Bright
External
Internal
to / from diplexer
to EGOLD
The electrical antenna switch
From/to Antenna
from PA
from EGOLD
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