Technical Description; Rf Overview - Panasonic EB-GD87 Service Manual

TECHNICAL DESCRIPTION

4 TECHNICAL DESCRIPTION

4.1. RF Overview

4.1.1 General Specifications
The telephone is a triple band product incorporating three switchable transceivers, E-GSM 900 band,GSM 1800 (DCS 1800)
band and GSM 1900 band. The transmit and receive bands are given in the table below:
Other notable technical features are as follows:
Rx Bandwidth
Tx Bandwidth
Duplex Spacing
Number of Channels
AFRCN (Channel Numbers)
1st Tx Channel
Last Tx Channel
1st Rx Channel
Last Rx Channel
Maximum Tx Power
Minimum Tx Power
4.1.2 Main PCB Description
All RF components are located on one side of the top half area of the Main PCB, with the baseband components (Logic
circuits) occupying the lower half of the Main PCB. The RF circuit area is shielded by two metal screens and the Logic circuits
area by one screen.
The keypad is mounted on the reverse side of the PCB.
4.1.3 Flexi-PCB
All components and the connectors for the Sub LCD module, camera, receiver, main display (x2) are located on one side of
the Flexi-PCB.
Issue B
Revision 0
Tx
E-GSM 900 880-915 MHz
GSM 1800 1710-1785 MHz
GSM 1900 1850-1910MHz
E-GSM 900
35 MHz
35 MHz
45 MHz
174
0-124
975 - 1023
880.2 MHz
(Ch 975)
914.8 MHz
(Ch 124)
925.2 MHz
(Ch 975)
959.8 MHz
(Ch 124)
33.0 dBm
(Class 4) (PL5)
5.0 dBm
(PL19)
Section 4
– 8 –
Rx
925-960 MHz
1805-1880 MHz
1910-1990MHz
GSM 1800
75 MHz 60MHz
75 MHz 60MHz
95 MHz 80MHz
374 299
512-885 512-885
1710.2 MHz 1850.2MHz
(Ch 512) (Ch 512)
1784.8 MHz 1909.8MHz
(Ch 885) (Ch 885)
1805.2 MHz 1930.2MHz
(Ch 512) (Ch 512)
1879.8 MHz 1989.8MHz
(Ch 885) (Ch 885)
30.0 dBm 30.0 dBm
(Class 1) (PL0) (Class 1)
0.0 dBm 0.0 dBm
(PL15) (PL15)
GSM 1900
MMCD021001C8
Service Manual