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T68i
White Paper, April 2002
57
Performance and technical characteristics
Data transmission rate up to 108,800 bps with one time slot
Specific commands working
with the SIM card
No
Support of multipoint
connections
No
Dimension GSM 900/E-GSM
900
GSM 1800 GSM 1900
Frequency range TX: 880 – 914 MHz
RX: 925 – 959 MHz
TX: 1710 – 1785
RX: 1805 – 1880
TX: 1850 – 1910
RX: 1930 – 1990
Channel spacing 200 kHz 200 kHz 200 kHz
Number of channels 174 Carriers *8
(TDMA)
374 Carriers *8
(TDMA)
299 Carriers *8
(TDMA)
Modulation GMSK GMSK GMSK
TX Phase Accuracy < 5º RMS Phase
error (burst)
< 5º RMS Phase error
(burst)
<5ºRMSPhase
error (burst)
Duplex spacing 45 MHz 95 MHz 80 MHz
Frequency stability +/- 0.1 +/- 0.1 +/- 0.1
Voltage operation (nominal) 3.6 Volts 3.6 Volts 3.6 Volts
Transmitter RF power output 33 dBm Class 4 (2W
peak)
30 dBm Class 1 (1W
peak)
30 dBm Class 1 (1W
peak)
Transmitter Output
impedance
50
Ω
50
Ω
50
Ω
Transmitter Spurious
emission
<-36dBmupto1
GHz
<-30dBmover1
GHz
(accordingtoGSM
spec.)
<-30dBm
(accordingtoGSM
spec.)
<-30dBm
(accordingtoGSM
spec.)
Receiver RF level Better than – 102
dBm
– 102 dBm – 102 dBm
Receiver RX Bit error rate < 2.4% < 2.4% < 2.4%