Raveon RV-M7-UC-PL Technical manual - page 27
M7 PL Technical Manual
27
Raveon Technologies Corp.
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
(
to set the idle moving update interval to 2 minutes.)
TRIGDX 500
(tells it to report at the IDLERATE if it does not move this far)
TXRATE 10
(
configures it to report every 10 seconds whenever it is moves more than TRIGDX meters)
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
.