Service manual

4. Taichi Specifications
General
Function GSM Specification DCS Specifications
Frequency Range 890-915 MHz Tx, 935-960 MHz Rx 1710-1785MHz TX
1805-1880 MHz RX
Channel Spacing 200 KHz
Channels 124 carriers with 8 channels per carrier 375 carriers with 8
cahnnels per carrier
Modulation GMSK at BT = 0.3
Transmitter Phase
Accuracy
5 Degrees RMS, 20 Degrees peak
Duplex Spacing 45 MHz 95 MHz
Frequency Stability +/- .10 ppm of the downlink frequency
( Rx )
Operating Voltage +3.9 Vdc to + 6.0 dc ( battery )
Transmit Current 200 mA average, 1.0 A peak
Stand-by Current Average 10mA ( DR X 2 ) Average 6mA DC X 2, 4
mA DC X 9
Dimensions 140mm(L) X 50mm(W) X 27mm (D)
???
Size (Volume) 157cc ???
Weight Approximately 160g. Includes
700mAh Nicad battery pack and
antenna. ???
Temperature Range
-20 °C to +55 °C -25 °C to +55 °C
Transmitter
RF Power Output 32 dBm +/- 2dBm 30 dBm +/- 2dBm
Output Impedance 50 ohms (nominal)
Spurious Emissions -36 dBm up to 1GHz, ( <-30dBm >
1GHz ) 22
Power Steps 15 10
Receiver
RF Level -102 dBm -100 dBm
RX bit error rate ( 100
kbits )
< 2% < 2%
Channel Hop Time 500 microseconds
Time to Camp Approximately 10 seconds
Speech Coding