User's Manual

CSI-Wireless AssetLink 200 Installation and Operating Instructions
Revision 1.0 Page 7 1/2/2002
System Identification (SID)
ESN
2.6 Power Consumption Profile
The AssetLink 200 unit has three major operating modes:
Power Off This is the lowest consumption mode to maintain the RTC,
relay outputd digital outputs and monitor external digital
inputs. The current draw from the supply lines in this mode is
less than 30 microamperes at 12 volts.
Armed In this mode the unit checks for scheduled events ), external
analog and digital inputs. Any unused modules are powered
down. When processing is not required the unit runs in the
power off state. The current draw from the supply lines in
this mode is nominally 150 milliamperes at 12 volts.
Active This is the full operating mode with both the GPS and the
Cellular Section powered on continuously. The unit monitors
exceptions, receives GPS position fixes and the Cellular
Section is in the standby mode ready to receive any messages.
The Cellular Section transmitter is turned on as required. The
current draw from the supply lines in this mode is nominally
150 milliamperes with periods at 600 milliamperes at 12 volts
when the cellular unit is in full power transmit.
3 Performance Specifications
3.1 Cellular Transceiver
Parameter
Specification Units
Frequency Range (Tx)
824.010 848.970 MHz
Frequency Range (Rx)
869.010 893.970 MHz
Channel Spacing
30 KHz
Deviation
± 12
KHz Max.
Number of Channels
832
Antenna Impedance
50 Ohms
Receiver Sensitivity
-116 dBm typical
Transmitter Power Output
0.6 Watts nominal
Peak Deviation
+/- 8 KHz
Frequency Stability
+/- 2.5 ppm maximum
Carrier Switching Time
2 ms
Channel Switching Time
40 ms maximum
Table 6– Cellular Transceiver Performance Characteristics
3.2 GPS Receiver
Parameter
Specification
Receiver
L1, C/A code
Channels
12
Max Solution Update rate
1/second
Satellite Reacquisition Time
100 ms
Snap Start
< 2 seconds
Hot Start
< 8 seconds