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6.1.
Position Transmission
When the ATLAS PL transmits its position, it also reports other status information
such as voltage, input bits, temperature, velocity, and heading. All of these
parameters are compressed into a short data packet, and sent over the air in the
proper TDMA time slot. Each ATLAS PL is assigned a time slot, based upon its ID.
ID 1 is slot 1, ID 2 is slot 2...
Position/status reporting happens in one of 2 intervals.
A) At the TXRATE setting. This is the transmit frequency interval setting. The
user configures TXRATE to be shortest acceptable interval between reports.
The factory default is 10 seconds.
B) At the IDLERATE setting. This is the idle reporting interval, usually the
longest acceptable time between position reports.
IDLERATE is used as a slow-reporting rate for parked vehicles, vehicles that have
no active trigger inputs, no proximity alerts, and that the user has programmed
them to require a minimum movement distance before they will report.
6.2.
Set the Transmission Report rate
Using the TXRATE xx command to set the report rate, in seconds, for the ATLAS
PL transponder. For example, if you wish the RV-M7 to report every 5 minutes,
set the report rate to 300 seconds (TXRATE 300).
If you only want the ATLAS PL to report position and status when it is moving, set
the TXRATE xx to the desired time between position transmissions. Then,
program the IDLERATE xx to the desired number of seconds between reports
when the unit is not moving (idle).
Important!:
Set the minimum distance the unit must move before a transmission
occurs with the TRIGDX xx command. If TRIGDX is set to zero, then the unit will
always report at the interval set with the TXRATE xx command.
For example, to transmit every 2 minutes when idle, and every 10 seconds when
moving more than 500 meters, use these commands:
IDLERATE 120 (
TRIGDX 500
(tells it to report at the IDLERATE if it does not move this far)
TXRATE 10 (
The following diagram illustrates the logic behind the various programmable
parameters that can be used to configure the ATLAS PL to trigger position
transmission. The logic inside of the ATLAS PL shown is tested at a user-
programmable rate, called the TXRATE. The TXRATE is the time interval
between ATLAS PL position/status radio transmissions.
The diagram clearly shows that if TRIGDX is set to 0, the unit will always transmit
when it is supposed to, at the interval programmed into the TXRATE.
M7 PL Technical Manual
to set the idle moving update interval to 2 minutes.)
configures it to report every 10 seconds whenever it is moves more than TRIGDX meters)
27
Raveon Technologies Corp.
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