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Technical Site Documentation myC-4
Ref. SCT U38 SSC DTS 0023 – Index B - February 21, 2005 Page
2-1
CHAPTER 2 - DESCRIPTION - OPERATION
2.1 REMINDERS ABOUT THE GENERAL NETWORKS CHARACTERISTICS
Table 1 below gives the characteristics of the radio interface for the GSM 850 / 900, GSM 1800 systems :
GSM 900 GSM 1800
Frequency Band (MHz)
890 - 915
925 - 960 1710 - 1785
1805 - 1880
Number of time intervals per TDMA
frame
8
Width 2 x W simplex (MHz) 2 x 25 2 x 75
Duplex spacing (MHz) 45 95
Modulation speed (kbit/s) 271
Speech throughput (kbit/s) 13 (5,6)
Maximum data throughput (kbit/s)
12
Multiple access Frequency and temporal
multiplexing / frequency duplexing
Cell radius (km) 0,3 to 30 0,1 to 4
SAGEM terminal power (W) 2 1
Table 1 : Radio Interface
Table 2 shows powers as a function of the network :
GSM 900 GSM 1800
Class number Maximum nominal
power (W)
Allowable
interval (W)
Maximum nominal
power (W)
Allowable
interval (W)
1 - - 1 [0,63 ; 1,6]
2 8 [5,0 ; 12,7] 0,25 [0,16 ; 0,4]
3 5 [3,2 ; 7,9] 4 [2,5 ; 6,3]
4 2 [1,3 ; 3,2]
5 0,8 [0,5 ; 1,3]
Table 2: Terminals power class
Table 3 shows power classes :
Class 1 Class 2 Class 3 Class 4 Class 5
GSM 900 43 dBm 39 dBm 37 dBm 33 dBm 29 dBm
GSM 1800 30 dBm 24 dBm 36 dBm - -