Table of Contents
Advertisement
12. Mechanical
Note: The GPS connector is SMA.
13. ATLAS PL Messages
The ATLAS PL sends and receives messages in the NMEA 0183 format. NMEA is
a standard protocol, use by GPS receivers to transmit data. NMEA output is EIA-
422A but for most purposes it is RS-232 compatible. Use 4800 bps, 8 data bits, no
parity and one stop bit ( 8N1 ) for standard NMEA data.
NMEA 0183 sentences are all ASCII characters. Each sentence begins with a
dollar sign ($) and ends with a carriage return linefeed (<CR><LF>). Data is
comma delimited. All commas must be included as they act as markers. Some
GPS do not send some of the fields. A checksum is added to the end of the
message. Following the $ is the address field aaccc. aa is the device id. "GP" is
used to identify GPS data. Transmission of the device ID is usually optional. ccc is
the sentence formatter, otherwise known as the sentence name.
The ATLAS PL supports the NMEA standard WPL, TLL, GGA, and GSV
sentences. The Raveon proprietary PRAVE sentence is sent out of the ATLAS PL
M7 PL Technical Manual
40
Raveon Technologies Corp.
Advertisement
Table of Contents
