Technical Manual

Rev. 1Telital S.p.A.
TECHNICAL MANUAL
GS/GSM
DUAL MODE USER TERMINAL
Page 2 of 13
3.1 Operating frequencies
3.1.1 GSM
The GSM operating frequencies are:
TX frequencies: 890.2  914.8 MHz
RX frequencies: 935.2  959.8 MHz
The channel (ARFCN) are numbered from 1 to 124 and frequency offset between TX and
RX frequency is 45 MHz.
3.1.2 GLOBALSTAR
The satellite operating frequencies are the standard Globalstar frequencies.
TX frequencies: 1618.11 MHz
Bandwidth: 15.99MHz
Channel bandwidth: 1.23MHz
Minimum channel shift: 30KHz
Number of shift: 0  511
Number of preferred channels: 13
Preferred channels: 4, 45, 86, 127, 168, 209, 250,
291, 332, 373, 414, 455, 496.
Rx frequencies: 2491.77 MHz
Bandwidth: 15.99MHz
Channel bandwidth: 1.23MHz
Minimum channel shift: 123KHz
Number of shift: 0  127
Number of preferred channels: 13
Preferred channels: 3, 13, 23, 33, 43, 53, 63, 73,
83, 93, 103, 113, 123.
3.2 Transmitter output power
3.2.1 GSM
a) RF power on 50 Ohm
The GSM section of the DMUT is a class 4 radiotelephone according to standard ETSI reg-
ulation that fix the limit at 2 Watts (+33dBm) on 50 Ohm;
In normal test conditions the transmitter nominal power range is between +31.5 dBm and
+32.5 dBm on 50 Ohm.
With a supply voltage range between 6.7V and 8.4V and temperature range between
–10°C and +55°C the transmitter power range is between +30.5 dBm and +32.5 dBm on
50 Ohm.
b) ERP power
Not supplied in the GSM specification.
The EIRP power will be measured in anechoic chamber.