Toshiba TS605 Service Manual - Page 63

FREQUENCY PLAN, General, Antenna

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MOBILE COMMUNICATIONS DIVISION CUSTOMER SERVICES 6.1.3 FREQUENCY PLAN The TX frequency plan is shown below TX frequency plan TX frequency TX IF TX RF LO EGSM 900 880.2-914.8MHz 88.46-114.35MHz 1459.591543.725MHz GSM 1800 1710.21784.8MHz 90.316104.776MHz 1354.7371414.482MHz PCS 1900 1850.21909.8MHz 97.379112.341MHz 1460.6841516.606MHz Figure Receiver block frequency plan General RF circuit design is built based on SKYWORKS-74117 direction conversion transceiver IC integrated by SAW filters, power amplifier with control circuit, and Transmitter/receiver switch. RF LO always requires 26MHz for reference provided with external XTAL and internal oscillator circuits. And LO frequency is periodically re-tuning to synchronize with cell or network. Antenna TS10's antenna is designed for embedded type and this design is fabricated on a FPC. It supports triple band applications. Version 1.0 22/11/2006 Created by Konrad Szombara Page 63 of 103

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MOBILE COMMUNICATIONS DIVISION
CUSTOMER SERVICES
Version 1.0 22/11/2006
Created by Konrad Szombara
Page 63 of 103
6.1.3 FREQUENCY PLAN
The TX frequency plan is shown below
TX frequency
plan
TX frequency
TX IF
TX RF LO
EGSM 900
880.2-914.8MHz
88.46-114.35MHz
1459.59-
1543.725MHz
GSM 1800
1710.2-
1784.8MHz
90.316-
104.776MHz
1354.737-
1414.482MHz
PCS 1900
1850.2-
1909.8MHz
97.379-
112.341MHz
1460.684-
1516.606MHz
Figure
Receiver block frequency plan
General
RF circuit design is built based on SKYWORKS-74117 direction
conversion transceiver IC integrated by SAW filters, power amplifier with
control circuit, and Transmitter/receiver switch.
RF LO always requires 26MHz for reference provided with external XTAL
and internal oscillator circuits. And LO frequency is periodically re-tuning to
synchronize with cell or network.
Antenna
TS10‘s antenna is designed for embedded type and this design is fabricated
on a FPC. It supports triple band applications.