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WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 45
Fastrack Xtend User Guide
Interfaces
5.1.2.4.2. Speaker
The speaker outputs are connected in differential mode to reject common mode noise and TDMA
noise.
Speaker outputs are connected to internal push-pull amplifiers and may be loaded down with
components between 32 ~ 150 and up to 1nF. These outputs may be directly connected to a
speaker.
The output power may be adjusted by 2dB steps. The gain of the speaker outputs is internally
adjusted and may be tuned using the AT+VGR command. Furthermore, the digital gain can be
adjusted using AT+WDGR. Refer to document [7] Firmware 7.4a AT Commands Manual (Sierra
Wireless Software Suite 2.31)/Firmware 7.4 AT Commands Manual (Sierra Wireless Software Suite
2.30) for more information about these AT commands.
The following table shows the pin assignments of the speaker outputs.
Table 19. Speaker Outputs Pin Description
(Sub D
15-pin)
Pin #
Signal
I/O
I/O Type
Description
10
CSPK2P
O
Analog
Speaker positive output
15
CSPK2N
O
Analog
Speaker negative output
Figure 20. Equivalent Circuit of CSPK2 Speaker Outputs
Table 20. Electrical Characteristics of CSPK2
Parameters
Min
Typ
Max
Unit
Biasing voltage
CSPK2P and CSPK2N
1.30
V
Output swing
voltage
RL=8: AT+VGR=-1000*; differential
-
-
4
Vpp
RL=32: AT+VGR=-1000*; differential
-
-
5
Vpp
RL
Load resistance
6
8
-
IOUT
Output current; peak value; RL=8
-
-
180
mA
POUT
RL=8; AT+VGR=-1000*;
-
-
250
mW
RPD
Output pull-down resistance at power-down
28
40
52
k
VPD
Output DC voltage at power-down
-
-
100
mV
* The output voltage depends of the output speaker gain set by AT command. Refer to document [7] Firmware
7.4a AT Commands Manual (Sierra Wireless Software Suite 2.31)/Firmware 7.4 AT Commands Manual (Sierra Wireless
Software Suite 2.30). This value is given in dB, but it‟s possible to toggle this to index value.
- AirLink FXT Series 1
- Fastrack Xtend User Guide 1
- Important Notice 2
- Safety and Hazards 2
- Limitations of Liability 2
- Patents 3
- Copyright 3
- Trademarks 3
- Contact Information 3
- Document History 4
- Contents 6
- List of Figures 11
- List of Tables 13
- 1. Overview 16
- 1.2. Overall Dimensions 19
- 1.4. Connections 20
- 1.5. Interfaces 20
- 2. Features and Services 22
- Features and Services 23
- 2.2. Supported Bands 26
- 2.4. Protection 27
- 3.2. RF Functionalities 29
- 3.3. Operating System 29
- 4. Technical Specifications 30
- 5. Interfaces 32
- , Vref = 2.8V 34
- , Vref > 2.8V 37
- 5.1.1.2. ON/OFF Pin 38
- 5.1.2. Serial Interface 39
- 5.1.2.2. Autobauding Mode 43
- 5.1.2.4.2. Speaker 45
- 5.1.3. USB Interface 46
- 5.2. Back Interface 47
- 5.2.2. Main RF Interface 48
- FXT010) 49
- 6. Signals and Indicators 53
- 6.4. LED Status Indicator 55
- 6.5. Real Time Clock (RTC) 56
- 7. Expansion Card 57
- Expansion Card 58
- 7.4.1. Ethernet 61
- 7.4.1.2. Board Architecture 62
- 7.4.1.4. Power Supply 63
- 7.4.2. IO+GPS 64
- 7.4.2.4. Power Supply 67
- 7.4.2.7. External Antenna 67
- 7.4.2.8. GPS RF Performance 68
- 7.4.3.2. Board Architecture 69
- 7.4.3.4. Power Supply 71
- 7.5. Expansion Card Removal 72
- 8. Using the Fastrack Xtend 73
- 8.2. Getting Started 74
- 8.4. Operational Status 78
- 9.1. Communications Testing 79
- 9.5. Switching Bands 81
- 9.8. Echo Function 83
- 9.9. DC-IN Detection 83
- Firmware 7.4a 84
- 11.2. Receiving “ERROR” 86
- 12. Power Consumption 88
- 12.2. Working Mode Features 89
- (FXT009) 90
- (FXT003) 92
- 12.8.1.1. Equipment 99
- 12.8.1.2. SIM Cards Used 100
- Power Consumption 101
- Fastrack Xtend on Trucks 103
- 14.1. Standard Accessories 105
- 14.3. Optional Battery 105
- Battery Accessory 107
- 15.3. Charging Time 109
- 15.2. LED Indicator 109
- 15.5. DC-IN Detection 110
- Other Information 111
- Recommended Standards 112
- 16.3.2.1. Life Stress Test 114
- Recovery time: 3 hours 115
- 18. Safety Recommendations 121
- 18.2. Battery Safety 122
- 18.3. Vehicle Safety 122
- 18.4. Care and Maintenance 122
- 18.5. Your Responsibility 123
- 19. Reference Documents 124
- 20. List of Abbreviations 126
- List of Abbreviations 127
- 21. Appendix A: Packaging 128
- 21.2.1. GSM Antenna 130
- 21.2.2. GPS Antenna 131
- 21.2.3. Serial Data Cable 132
- 21.2.5. USB Cable 134
- 21.2.7. Package 135
- 21.2.8. Two Holding Bridles 135
- 23. Appendix C: Safety 139
- 23.2. General Safety 140
- 23.2.6. Children 141
- 23.2.7. Blasting Areas 141
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