User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document history
- Introduction
- Product concept
- GSM application interface
- GSM/GPRS operating modes
- Power supply
- Power up / down scenarios
- Automatic GPRS Multislot Class change
- Charging control of the GSM part
- Power saving
- Summary of state transitions (except SLEEP mode)
- RTC backup for GSM part of XT55/56
- Serial interfaces of the XT55/56 GSM part
- Audio interfaces
- SIM interface
- Control signals
- GPS application interface
- GSM and GPS antenna interfaces
- Electrical, reliability and radio characteristics
- Mechanics
- Reference approval
- Example applications
- List of parts and accessories
XT55/56 Hardware Interface Description
Confidential / Released
s
XT55/56_hd_v02.06a Page 98 of 125 17.12.2004
Average Current DCS1800 (V
BATT+
=4.1V)
0.10
0.10
0.12
0.13
0.18
0.13
0.14
0.16
0.19
0.26
0
0.05
0.1
0.15
0.2
0.25
0.3
0123456789101112131415
Power Control Level
Current (Amps)
1 TX - Average Current
2 TX - Average Current
Figure 42: Typical current consumption vs. return loss in GSM 1800 network
Average Current PCS1900 (V
BATT+
=4.1V)
0.10
0.11
0.12
0.13
0.17
0.13
0.14
0.17
0.21
0.29
0
0.05
0.1
0.15
0.2
0.25
0.3
0123456789101112131415
Power Control Level
Current (Amps)
1 TX - Average Current
2 TX - Average Current
Figure 43: Typical current consumption vs. return loss in GSM 1900 network