Panasonic EB-GD93, Техническое руководство, Страница: 15 / 46

TRANSMITTER
MCUK001001G8 Section 4 Issue 1
Technical Guide – 11 – Revision 0
4 TRANSMITTER
4.1. Introduction
This section provides a technical description of the transmitter circuits of the Main PCB. A circuit diagram of the whole system
is provided in the Service Manual.
4.2. Uplink Frequencies
These assemblies MUST be performed by qualified service personnel at an authorised service centre.
The following Warnings and Cautions MUST be observed during all disassembly / reassembly operations:
4.2.1 GSM 900
The uplink frequencies for the GSM 900 band are as follows:
Uplink frequencies for the GSM 900 band can be calculated as follows:
Uplink frequency = 890 MHz + (ARFCN x 0.2 MHz)
e.g. for CH55
890 MHz + (55 x 0.2 MHz)
=
890 MHz + (11 MHz)
= 901 MHz
4.2.2. GSM 1800
The uplink frequencies for the GSM 1800 band can be calculated as follows:
Uplink frequency = 1710 MHz + ((AFRCN - 511) x ).2MHz)
e.g. for CH512
1710 MHz + ((512 - 511) x 0. 2MHz)
=
1710 MHz + (0.2 MHz)
= 1710.2 MHz
CHANNEL
NUMBERS
UPLINK FREQUENCIES
1-5
6-10
11-15
16-20
21-25
890.200
891.200
892.200
893.200
894.200
890.400
891.400
892.400
893.400
894.400
890.600
891.600
892.600
893.600
894.600
890.800
891.800
892.800
893.800
894.800
891.000
892.000
893.000
894.000
895.000
26-30
31-35
36-40
41-45
46-50
895.200
896.200
897.200
898.200
899.200
895.400
896.400
897.400
898.400
899.400
895.600
896.600
897.600
898.600
899.600
895.800
896.800
897.800
898.800
899.800
896.000
897.000
898.000
899.000
900.000
51-55
56-60
61-65
66-70
71-75
900.200
901.200
902.200
903.200
904.200
900.400
901.400
902.400
903.400
904.400
900.600
901.600
902.600
903.600
904.600
900.800
901.800
902.800
903.800
904.800
901.000
902.000
903.000
904.000
905.000
76-80
81-85
86-90
91-95
96-100
905.200
906.200
907.200
908.200
909.200
905.400
906.400
907.400
908.400
909.400
905.600
906.600
907.600
908.600
909.600
905.800
906.800
907.800
908.800
909.800
906.000
907.000
908.000
909.000
910.000
101-105
106-110
111-115
116-120
121-124
910.200
911.200
912.200
913.200
914.200
910.400
911.400
912.400
913.400
914.400
910.600
911.600
912.600
913.600
914.600
910.800
911.800
912.800
913.800
914.800
911.000
912.000
913.000
914.000