Technical Description; Rf Overview; Introduction - Panasonic EB-G60 Service Manual

5. TECHNICAL DESCRIPTION

5.1. RF Overview

5.1.1. Introduction

General Specifications
The telephone is a Dual Band product incorporating two switch able transceivers, one for the E-GSM 900 band
and another for the GSM 1800 (DCS 1800) band. The transmit and receive bands for the mobile are given in
the table below:
E-GSM 900
GSM 1800
GSM 850
GSM 1900
Other salient technical features are as follows:
Rx Bandwidth
Tx Bandwidth
Duplex Spacing
Number of Channels
AFRCN(Channel Numbers) 0 - 124
1st Tx Channel
Last Tx Channel
1st Rx Channel
Last Rx Channel
Maximum Tx power
Minimum Tx power
Main PCB Description
All components required for the RF and Logic circuits, excluding the LCD module, are contained on a single
printed circuit board (PCB). The PCB has six layers with lay1-2 and layer 5-6 build-up Surface and back layer
tracks are gold-plated to prevent oxidization and enable better soldering. The PCB mother broad thickness is 1
mm ± 0.1 mm; MMI is 0.4 min ± 0.05 mm. All RF components are located on one side of the bottom half area of
the PCB, with the baseband components (Logic circuits) occupying the lower half of the PCB. A metallised shield
shields the RF circuit area. The top half of the back case has been designed to provide a shielded enclosure to
reduce further spurious emissions and logic noise.
Tx
880 - 915 MHz
1710 - 1785 MHz
824 - 849 MHz
1850 - 1910 MHz
E-GSM 900 GSM 1800
35 MHz 75 MHz
35 MHz 75 MHz
45 MHz 95 MHz
174 374
512 - 885
975 - 1023
880.2 MHz 1710.2 MHz
(Ch975) (Ch512)
914.8MHz 1784.8 MHz
(Ch124) (Ch885)
925.2 MHz 1805.2 MHz
(Ch 975) (Ch512)
959.8 MHz 1879.8 MHz
(Ch124) (Ch885)
33.0dBm 30dBm
{Class 4}(PL5) {Class 1}(PL0)
5.0dBm 0.0dBm
(PL19) (PL15)
– 5–1 –
Rx
925 - 960 MHz
1805 - 1880 MHz
869 - 894 MHz
1930 - 1990 MHz
GSM 850 GSM 1900
25 MHz 60 MHz
25 MHz 60 MHz
45 MHz 80 MHz
124 299
128 - 251 512 - 810
824.2 MHz 1850.2 MHz
(Ch128) (Ch512)
848.8 MHz 1909.8 MHz
(Ch251) (Ch810)
869.2 MHz 1930.2 MHz
(Ch128) (Ch512)
893.8 MHz 1989.8 MHz
(Ch251) (Ch810)
33.0dBm 30dBm
{Class 4}(PL5) {Class 1}(PL0)
5.0dBm 0.0dBm
(PL19) (PL15)