Main Rf Characteristics - Nokia RM-272 Service Manual

RM-272; RM-273
System module
Voltage
Higher extreme voltage
a. ADC settings in the SW might shutdown the phone above this value.
b. During fast charging of an empty battery, this voltage might exceed this value. Voltages between 4.20 and
4.60 might appear for a short while.

Main RF characteristics

System Channel number
GSM850 128 <= n <= 251
GSM900 0 < =n <= 124
975 <= n <= 1023
GSM1800 512 <= n <= 885
GSM1900 512 <= n <= 810
Parameter
Cellular systems
RX Frequency range
TX Frequency range
Duplex spacing
Channel spacing
Issue 1
Voltage (V)
4.2
Table 12 Channel numbers and frequencies
TX frequency
F = 824.2 + 0.2*(n -
128)
F = 890 + 0.2*n
F = 890 + 0.2* (n -
1024)
F = 1710.2 + 0.2* (n -
512)
F = 1850.2 + 0.2* (n -
512)
Table 13 Main RF characteristics
RM-272: EGSM900/GSM1800/GSM1900
RM-273: GSM850/GSM1800/GSM1900
GSM850: 869 ... 894 MHz
EGSM900: 925 ... 960 MHz
GSM1800: 1805...1880 MHz
GSM1900: 1930...1990 MHz
GSM850: 824 ... 849 MHz
EGSM900: 880 ... 915 MHz
GSM1800: 1710 ...1785 MHz
GSM1900: 1850...1910 MHz
GSM850: 45 MHz
EGSM900: 45 MHz
GSM1800: 95 MHz
GSM1900: 80 MHz
200 kHz
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Condition
b
RX frequency
F = 869.2 + 0.2*
(n-128)
F = 935 + 0.2*n
F = 935 + 0.2*(n
-1024)
F = 1805.2 + 0.2*
(n-512)
F = 1930.2 + 0.2*
(n-512)
Unit and value
Unit
MHz
MHz
MHz
MHz
MHz
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