Iridium SHOUT ns General Description Manual page 35

When motion detection is enabled, the device will monitor the motion sensor to detect
when the device is in motion. To detect the start of motion, an algorithm involving motion
detection windows is used. This algorithm succeeds to detect motion when a certain number
of contiguous windows are each satisfied by a minimum number of TTL pulses from the motion
sensor. Figure 11 illustrates the algorithm with a window count of 3, window duration of 1
minute, and a sensitivity of 2 TTL pulses.
NOTE: The motion detection algorithm will start over whenever the device
receives a remote update. A remote update, in addition to restarting the motion
detection algorithm, will also reset the motion state of the device back to
motionless.
NAL Research Corporation (451-01001.B)
Figure 10. General Profile window with Motion tab.
35