User's Manual

Telit GE863-GPS
Hardware User guide
1vv0300714, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved page 2 of 76
Contents
1 OVERVIEW 5
2 HARDWARE COMMANDS 6
2.1 Turning ON the GE863-GPS 6
2.2 Turning OFF the GE863-GPS 8
2.2.1 Hardware shutdown 8
2.3 Hardware Unconditional Reboot 8
3 POWER SUPPLY 10
3.1 Power Supply Requirements 10
3.2 General Design Rules 10
3.2.1 Electrical design Guidelines 11
3.2.1.1 + 5V input Source Power Supply Design Guidelines 11
3.2.1.2 + 12V input Source Power Supply Design Guidelines 13
3.2.1.3 Battery Source Power Supply Design Guidelines 14
3.2.1.4 Battery Charge control Circuitry Design Guidelines 14
3.2.2 Thermal Design Guidelines 16
3.2.3 Power Supply PCB layout Guidelines 17
4 ANTENNA 18
4.1 GSM Antenna Requirements 18
4.2 GSM Antenna - PCB line Guidelines 19
4.3 GSM Antenna - installation Guidelines 20
4.4 GPS Antenna Requirements 20
4.4.1 Combined GPS Antenna 20
4.4.2 Linear and Patch GPS Antenna 20
4.4.3 LNA and Front End Design Considerations 21
4.5 GPS Antenna - PCB line Guidelines 23
4.6 GPS Antenna - installation Guidelines 23