User Manual
Table Of Contents
- 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 / Preliminary
s
XT55/56_hd_v02.96 Page 99 of 125 18.08.2005
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