Circuit Operation (Rf Part) - Panasonic KX-TG6440PK Service Manual

KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B
4.8.

Circuit Operation (RF Part)

General Description:
RF part includes Transmitter and Receiver functions. Digital signals (Mainly voice data) that come from DSP, are modulated and
are transmitted. On the other hand, received signals are demodulated and go out to DSP.
4.8.1. Antenna-switch Circuit
IC701 controls D771 by TRSW/TRSW_n signals and carries out the switching of TX-mode/RX-mode. In the same way, IC701 con-
trols D781 by ANT/ANT_n signals and carries out the switching of Antenna1 (ANT1)/Antenna2 (ANT2).
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