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6.3.
Battery Life
The ATLAS PL uses a smart-battery pack with a built-in microprocessor. The
battery has the ability to turn the radio and GPS circuits completely off for a preset
amount of time, thus saving battery power.
Whenever the TXRATE is greater than about 60 seconds, the battery in the PL
may turn off the radio to conserve power. This condition is referred to as the
SLEEP state. During this Sleep state, the unit draws a total of about 1mA, giving a
battery life of 1000+ hours.
At the TXRATE interval, the battery will turn the radio back on, allow it to get GPS
lock, send its position/status, and then put the radio back into the Sleep state. This
features is enabled by setting the TXRATE to a number larger than 60 seconds.
When the unit is in the SLEEP mode, it cannot be put into the configuration mode.
Turn the unit off and back on before sending the +++.
6.4.
Data Transmission
To transmit data, send one or more bytes of data into the serial port of the modem.
When a full packet of data has been collected into the internal buffer of the modem,
or when there is a pause in the data, the modem will automatically key its
transmitter, and send the data over the air when the unit's TDMA time slot is
available.
The ATLAS PL will send position/status as well as transmit and receive serial data.
6.5.
Data Reception
Serial Port Data
When the ATLAS PL receives RS232 data over the radio, it checks it for errors,
and if it is error-free, it will send it out the serial port. Again, the serial port may be
set to any baud rate the user wishes, and the radio receiver and transmitter will
continue to operate independently of the baud rate.
When the modem receives a radio signal, it will assert the CD hardware signal on
the RS-232 serial port if it was configured to do so.
GPS Position and Status
When the ATLAS PL receives a position report and status from another ATLAS PL,
it will send this information out its RS232 port, formatted as configured with the
GPS x command. The ATLAS PL is GPS mode 8 (GPS 8).
message format is Raveon's $PRAVE message.
Change the position report output format with the OUTPUT x command.
Enable/disable the local GPS NMEA data with the NMEAOUT x command (0 off, 1
on)
The position/status messages that the ATLAS PL is able to send out of its serial
port are:
Message
M7 PL Technical Manual
Description
29
The default output
OUTPUT x
Raveon Technologies Corp.
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