Normal State; Low Power State; Usage Models - Sierra Wireless AirPrime series Hardware Integration Manual

Note: This is the default
state when VCC is first
applied in the absence of
control.
W_Disable#
Rev 2.02 Sep.10

Normal state

This is the active state of the module. In this state:
• The module is fully powered.
• The module is capable of placing/receiving calls or establishing data connec-
tions on the wireless network.
• The USB interface is fully active.

Low power state

In this state (also called "airplane mode"), RF (both Rx and Tx) is disabled in the
module, but the USB interface is still active.

Usage models

Usage models can be used to calculate expected current consumption. A sample
usage model is provided in
Table 2-1: Power consumption of sample application
Upload (module Tx)
Download (module Rx)
Coverage/data rate
Hours of operation
Total power consumed
over 24 hours
This example model applies to a battery-operated device. In practice, because
the module is isolated from the battery (the host device manages the power
source), the mAh ratings depend on the module's supply efficiency.
The module automatically enters slotted sleep mode when there is no
transmission or reception occurring (SCI = 2).
Transmit power is assumed to be +3 dBm.
Proprietary and Confidential
Table 2-1,
Used by a field
worker (data only)
1000 kB/day
500 kB/day
1X/80 kbps
8 hrs/day (off 16 hrs/day)
60 mAh
Power Interface
Used for remote
data logging
40 kB/h
100 kB/day
IS-95/14.4 kbps
24/day
200 mAh
15