Ag Leader GPS 5200 User Guide - Manual (Page 13)

GPS 5200 Receiver User Guide 11
Overview 2
For more information on the National Marine Electronics
Association (NMEA) and Radio Technical Commission for
Maritime Services (RTCM) communication standard for GPS
receivers, go to the following websites:
– www.nmea.org
– www.rtcm.org
On the Trimble website ( www.trimble.com ), refer to the
document called NMEA-0183 Messages Guide for AgGPS Receivers.
• 1 PPS output
To synchronize timing between external instruments and the
internal clock in the receiver, the connection port outputs a
strobe signal at 1 PPS (pulse per second). To output this signal,
the receiver must be tracking satellites and computing GPS
positions.
• J1939 (CAN) bus
Both connection ports on the receiver support the J1939
Controller Area Network (CAN) bus protocol. This protocol
standardizes the way multiple microprocessor-based electronic
control units (ECUs) communicate with each other over the
same pair of wires. It is used in off-highway machines, such as
those used in agriculture, construction, and forestry.
For more information, go to the Society of Automotive Engineers
(SAE) International website at
www.sae.org/servlets/index .
• ISO 11783 messages
Both CAN ports support some ISO 11783 messages.
Position output format
The GPS 5200 receiver outputs positions in Degrees, Minutes, and
Decimal Minutes (DDD°MM.m'). This is the NMEA standard format and
is commonly used worldwide for data transfer between electronic
equipment.
GPS5200_1A_UserGuide_ENG.book Page 11 Friday, December 19, 2008 12:57 PM