4. TECHNICAL DESCRIPTION
4.1. RF Overview
4.1.1 General Specifications
The telephone is a triple band product incorporating three switchable transceivers, GSM 900 (EGSM 900) band,
GSM 1800 (DCS 1800) band, and GSM 1900 (PCS 1900) band. The transmit and receive bands are given in the table below:
TxRx
EGSM 900880-915 MHz925-960 MHz
DCS 18001710-1785 MHz1805-1880 MHz
PCS 19001850-1910MHz1930-1990MHz
Other notable technical features are as follows:
EGSM 900GSM 1800GSM 1900
Rx Bandwidth35 MHz75 MHz60MHz
Tx Bandwidth35 MHz75 MHz60MHz
Duplex Spacing45 MHz95 MHz80MHz
Number of Channels174374299
ARFCN (Channel Numbers)975 - 1023512 - 885512 - 810
0 - 124
1st Tx Channel880.2 MHz1710.2 MHz1850.2MHz
(Ch 975)(Ch 512)(Ch 512)
Last Tx Channel914.8 MHz1784.8 MHz1909.8MHz
(Ch 124)(Ch 885)(Ch 810)
1st Rx Channel925.2 MHz1805.2 MHz1930.2MHz
(Ch 975)(Ch 512)(Ch 512)
Last Rx Channel959.8 MHz1879.8 MHz1989.8MHz
(Ch 975)(Ch 512)(Ch 810)
Maximum calibrated Tx Power, Voice Call 32.25 dBm29.25 dBm29.25 dBm
(Class 4) (PL5)(Class 1) (PL0)(Class 1)
Minimum calibrated Tx Power, Voice Call 5.0 dBm0.0 dBm0.0 dBm
(PL19) (PL15)(PL15)
4.1.2 Description of PCBs
The handset, which is in the form of a clamshell, contains three printed circuit boards. The main PCB is based on an 8 layer
methodology, constructed using ALIVH-G material. It carries all the RF components on the top half and the baseband
components (Logic circuits) on the lower half. The key pad is mounted on the reverse side of the main PCB. The RF circuit
area is shielded by two metal screens. One compartment contains the Antenna Switch Module (ASM), Power Amplifier
Module (PAM), TX SAW filter and limiter amplifier. The other shielded compartment contains the transceiver IC (Smarti-DC +),
TCXO, 3rd Harmonic (H3) filters, and the RX SAW filters. The logic and Bluetooth circuits are shielded by one screen each.
The second PCB is a flexible printed circuit. One side of its assembly consists of all the components and connectors required
for the sub LCD module, camera and main display. The third is a 4 layer PCB constructed using FR4 material. This board
contains the mini-SD and SIM card holders, as well as the vibrator.
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ACEC
PANASONIC
