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2 Overview
8 AgGPS 332 GPS Receiver User Guide
• 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 AgGPS 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.