Motorola A780, Service Manual, Page: 9 / 48

6809488A90 September 20, 2004 7
Level 1 and 2 Service Manual Specifications
Specifications
General Function Specification
Frequency Range GSM 850
824-848 MHz Tx
869-893 MHz Rx
Frequency Range GSM 900
880-915 MHz Tx (with EGSM)
925-960 MHZ Rx
Frequency Range DCS 1800
1710-1785 MHz Tx
1805-1880 MHz Rx
Frequency Range PCS 1900
1850-1910 MHz Tx
1930-1990 MHz Rx
Channel Spacing 200 kHz
Channels
174 EGSM, 374 DCS, 374 PCS, 124 GSM 850 carriers with 8
channels per carrier
Modulation GMSK at BT = 0.3
Transmitter Phase Accuracy 5 Degrees RMS, 20 Degrees peak
Duplex Spacing 45 MHz
Frequency Stability ± 0.10 ppm of the downlink frequency (Rx)
Operating Voltage
+3.2V dc to +5.5V dc (cell)
+4.8V dc to +6.5V dc (external charger)
Transmit Current Drain 80-160 mA average talk current drain
Stand-by Current Drain 5 mA (DRX2), 2 mA (DRX9) typical
Dimensions, with 1000 mAhr Li Ion
battery 49.2mm x 89.2mm x 28mm (excluding antenna)
(1.94 inches x 3.51 inches x 1.10 inches)
Size (Volume) 97 cc (5.91 in
3
)
Weight 148.3 gm (5.01 oz) with battery
Temperature Range -10° C to +55° C (+15° F to +130° F)
Battery Life, with standard 1000 mAhr
Li-Ion Battery Talk time 6.3 Hrs
Standby time 210 Hrs.
All talk and standby times are approximate and depend on
network configuration, signal strength, and features selected.
Standby times are quoted as a range from DRX=2 to DRX=9.
Talk times are quoted as a range from DTX off to DTX on.
Battery Charge Time 1.75 hours to 90% of 1000mAhr capacity
Transmitter Function Specification
RF Power Output 32 dBm nominal GSM 900, 29 dBm nominal GSM 1800
Output Impedance 50 ohms nominal
Spurious Emissions -36 dBm from 0.1 to 1 GHz, -30 dBm from 1 to 4 GHz
Receiver Function Specification
Receive Sensitivity Better than -103 dBm
RX Bit Error Rate (100k bits) Type II < 2%
Speech Coding Function Specification
Speech Coding Type Regular pulse excitation/linear predictive coding with long term
prediction (RPE LPC with LTP)
Bit Rate 13.0 kbps
Frame Duration 20 ms
Block Length 260 bits
Classes Class 1 bits = 182 bits; Class 2 bits = 78 bits
Bit Rate with FEC Encoding 22.8 kbps