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5
RECEIVER
5.1 Introduction
This Section provides a technical description of the receiver section of the RF circuit. A complete circuit diagram is provided in
the Service Manual.
The downlink frequencies for the GSM 900 and GSM 1800 bands can be calculated as follows:
5.1.1 Downlink Frequencies GSM 900
Downlink frequency
5.1.2 Downlink Frequencies GSM 1800
Downlink frequency
MCUK990801G8
Technical Guide
http://cxema.ru
CHANNEL
NUMBERS
1-5
935.200
6-10
936.200
11-15
937.200
16-20
938.200
21-25
939.200
26-30
940.200
31-35
941.200
36-40
942.200
41-45
943.200
46-50
944.200
51-55
945.200
56-60
946.200
61-65
947.200
66-70
948.200
71-75
949.200
76-80
950.200
81-85
951.200
86-90
952.200
91-95
953.200
96-100
954.200
101-105
955.200
106-110
956.200
111-115
957.200
116-120
958.200
121-124
959.200
=
935 MHz + (ARFCN x 0.2 MHz)
e.g. for CH55
935 MHz + (55 x 0.2 MHz)
=
935 MHz + (11 MHz)
=
946 MHz
=
1805 MHz + ((ARFCN - 511) x 0.2 MHz)
e.g. for CH512
1805 MHz + ((512 - 511) x 0.2 MHz)
=
1805 MHz + (0.2 MHz)
=
1805.2 MHz
DOWNLINK FREQUENCIES (MHz)
935.400
935.600
936.400
936.600
937.400
937.600
938.400
938.600
939.400
939.600
940.400
940.600
941.400
941.600
942.400
942.600
943.400
943.600
944.400
944.600
945.400
945.600
946.400
946.600
947.400
947.600
948.400
948.600
949.400
949.600
950.400
950.600
951.400
951.600
952.400
952.600
953.400
953.600
954.400
954.600
955.400
955.600
956.400
956.600
957.400
957.600
958.400
958.600
959.400
959.600
Section 5
– 15 –
935.800
936.000
936.800
937.000
937.800
938.000
938.800
939.000
939.800
940.000
940.800
941.000
941.800
942.000
942.800
943.000
943.800
944.000
944.800
945.000
945.800
946.000
946.800
947.000
947.800
948.000
948.800
949.000
949.800
950.000
950.800
951.000
951.800
952.000
952.800
953.000
953.800
954.000
954.800
955.000
955.800
956.000
956.800
957.000
957.800
958.000
958.800
959.000
959.800
RECEIVER
Issue 1
Revision 0
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