Technical Manual

1. INTRODUCTION
5
LZT 123 7607 R1B
• SMS: mobile-originated, mobile-terminated, cell broadcast
• Fax: Group 3, Classes 1 & 2
• 15 way high density connector
•5 V - 32 V d.c. input
• 4-wire audio connection
• Antenna connection (FME male)
• R&TTE type approved (GT47)
1.3 Main Features and Services
The GT47 performs a set of telecom services (TS) according to GSM
standard phase 2+, ETSI and ITU-T. The services and functions of the
GT47 are implemented by issuing customised applications embedded on
the device, or by AT commands issued internally, or over the RS232 serial
interface.
1.3.1 Types of Mobile Station
The GT47 is a dual band control terminal with the GSM radio
characteristics shown in the table below.
GT47 E-GSM 900 GSM 1800
Frequency Range (MHz) TX: 880-915
RX: 925-960
TX: 1710-1785
RX: 1805-1880
Channel spacing 200 kHz 200 kHz
Number of channels 174 carriers *8 time slots
E-GSM: channels 0 to 124
channels 975 to 1023
374 carriers *8 time slots
DCS: channels 512 to 885
Modulation GMSK GMSK
TX phase accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)
Duplex spacing 45 MHz 95 MHz
Receiver sensitivity at
antenna connector
< –102 dBm < –102 dBm
Transmitter output power at
antenna connector
Class 4
2 W (33 dBm)
Class 1
1 W (30 dBm)
Automatic hand-over between EGSM 900 and GSM 1800