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4
TRANSMITTER
4.1 Introduction
This section provides a technical description of the transmitter circuit of the RF circuit. A circuit diagram of the whole system is
provided in the Service Manual.
The uplink frequencies for the GSM 900 and GSM 1800 can be calculated as follows:
4.1.1 Uplink Frequencies GSM 900
Uplink frequency
4.1.2 Uplink Frequencies GSM 1800
Uplink frequency
MCUK990801G8
Technical Guide
http://cxema.ru
CHANNEL
NUMBERS
1-5
890.200
6-10
891.200
11-15
892.200
16-20
893.200
21-25
894.200
26-30
895.200
31-35
896.200
36-40
897.200
41-45
898.200
46-50
899.200
51-55
900.200
56-60
901.200
61-65
902.200
66-70
903.200
71-75
904.200
76-80
905.200
81-85
906.200
86-90
907.200
91-95
908.200
96-100
909.200
101-105
910.200
106-110
911.200
111-115
912.200
116-120
913.200
121-124
914.200
=
890 MHz + (ARFCN x 0.2 MHz)
e.g. for CH55
890 MHz + (55 x 0.2 MHz)
=
890 MHz + (11 MHz)
=
901 MHz
=
1710 MHz + ((ARFCN - 511) x 0.2 MHz)
e.g. for CH512
1710 MHz + ((512 - 511) x 0.2 MHz)
=
1710 MHz + (0.2 MHz)
=
1710.2 MHz
UPLINK FREQUENCIES (MHz)
890.400
890.600
891.400
891.600
892.400
892.600
893.400
893.600
894.400
894.600
895.400
895.600
896.400
896.600
897.400
897.600
898.400
898.600
899.400
899.600
900.400
900.600
901.400
901.600
902.400
902.600
903.400
903.600
904.400
904.600
905.400
905.600
906.400
906.600
907.400
907.600
908.400
908.600
909.400
909.600
910.400
910.600
911.400
911.600
912.400
912.600
913.400
913.600
914.400
914.600
Section 4
– 11 –
890.800
891.000
891.800
892.000
892.800
893.000
893.800
894.000
894.800
895.000
895.800
896.000
896.800
897.000
897.800
898.000
898.800
899.000
899.800
900.000
900.800
901.000
901.800
902.000
902.800
903.000
903.800
904.000
904.800
905.000
905.800
906.000
906.800
907.000
907.800
908.000
908.800
909.000
909.800
910.000
910.800
911.000
911.800
912.000
912.800
913.000
913.800
914.000
914.800
TRANSMITTER
Issue 1
Revision 0
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