T68i
White Paper, April 2002
57
Performance and technical characteristics
Data transmission rate up to 108,800 bps with one time slot
Specific commandsworking
with the SIM card
No
Support of multipoint
connections
No
Dimension GSM 900/E-GSM
900
GSM 1800 GSM 1900
Frequencyrange TX: 880 – 914 MHz
RX: 925 – 959 MHz
TX: 1710 – 1785
RX:1805 – 1880
TX: 1850 – 1910
RX: 1930 – 1990
Channel spacing 200kHz 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 RM S Phase error
(burst)
<5ºRMSPhase
error(burst)
Duplex spacing 45MHz 95 MHz 80 MHz
Frequency stability +/- 0.1 +/- 0.1 +/- 0.1
Voltag e opera tion (no minal) 3.6 Volt s 3.6 Vo lts 3.6 Volts
TransmitterRF power output 33 dBm Class4 (2W
peak)
30 dBm Class 1 (1W
peak)
30 dBm Class 1 (1W
peak)
TransmitterOutput
impedance
50 Ω50 Ω50 Ω
TransmitterSpurious
emission
<-36dBmupto1
GHz
<-30dBmover1
GHz
(accordingtoGSM
spec.)
<-30dBm
(accordingtoGSM
spec.)
<-30dBm
(accordingtoGSM
spec.)
Receiver RF level Better than – 102
dBm
– 102 dBm –10 2dB m
Receiver RX Bit error rate < 2.4% <2.4% < 2.4%