User guide

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 67
Fastrack Xtend User Guide
Expansion Card
7.4.2.4. Power Supply
Table 52. Electrical Characteristics
Operating Voltage
4V DC
Note: The IO+GPS Expansion Card is powered once the enable pins are activated by the Sierra Wireless
Software Suite.
7.4.2.5. Extra Current Consumption from the DC-IN Source
Depending on various DC-IN voltage of Fastrack Xtend, the extra current consumption drawn by the
GPS feature and the GPS active antenna will be different.
Table 53. Extra Current Consumption from DC-IN Source (Typical)
Condition
Extra Current Consumption for Additional
Feature (mA)
Mode
GPS Feature
@ 4.75VDC
@ 13.2VDC
@ 32VDC
Connected
GPS Enable with GPS
antenna bias ON
137
42
22
Non-Connected
GPS Enable with GPS
antenna bias ON
134
46.3
22.6
GPS Enable with GPS
antenna bias OFF
111
37.8
18.7
GPS antenna bias ON
27
8.5
3.8
7.4.2.6. GPS Receiver Frequency
Table 54. GPS Receiver Frequency
Characteristic
GPS
Frequency RX
1575.42 MHz
7.4.2.7. External Antenna
The external antenna is connected to the Expansion Card’s GPS via the MMCX connector.
The external antenna must fulfill the characteristics listed in the table below.
Table 55. External Antenna Characteristics
Antenna Frequency Range
1.57542GHz ± 1.023MHz (L1-Band)
Impedance
50 nominal
Voltage Supply
3.3V ± 0.5VDC
Gain (antenna + cable)
2dBi