NAL Research Corporation (TN2014-001-V1.4.5)
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With “Callable” set to “No” and “Awake on Motion” option selected, the 9602-LP can be triggered by an
internal motion sensor to send GPS report. The 9602-LP has a built-in motion sensor that works regardless of
how the 9602-LP is mounted or aligned. It is sensitive both to tilt (static acceleration) and vibration (dynamic
acceleration). When in motion, the sensor produces continuous on-off contact closures (a series of TTL level
logic or pulse train) as it chatters open and closed. The signal level is fed directly into the 9602-LP’s micro-
controller. When at rest, it normally settles in a closed state.
Three parameters must be provided when choosing the “Awake on Motion” option— “Minutes of Motion
Before Waking”, “Sensitivity” and “Motion Sensor Wait”. “Minutes of Motion Before Waking” is a user-defined
duration within which
valid motion
must exist before the 9602-LP sends a GPS report. For example, a car must
experience continuous motion for three minutes before a GPS report is sent. Otherwise, a slight bump by a
person or by a gust of wind does not initiate a report. The duration of “Minutes of Motion Before Waking” is
divided into one-minute blocks. “Sensitivity” is defined as the number of motion sensor on-off contact closures
the 9602-LP must detect in each of the one-minute block for motion within that block to be considered
valid
motion
. All contiguous one-minute blocks must have
valid motion
before a GPS report is sent. At any time a
block has an
invalid motion
, the “Minutes of Motion Before Waking” timer is reset and the motion detection
process starts over again. After
valid motion
is detected and a successful GPS report is sent, the 9602-LP goes
back to sleep with all circuits OFF. It will ignore the motion sensor input signal for “Motion Sensor Wait”
minutes. All other parameters and I/O pins are still observed by the 9602-LP.
Figure 7.
SatTerm Setup Window for Normal Tracking and “Callable (No)”.
