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2 Overview
6 AgGPS 252 Receiver User Guide
• provide support for the J1939 (CAN) serial bus
For more information about the inputs, outputs, and LED indicators,
see the information in the rest of this section.
2.3 Receiver Input/Output
The AgGPS 252 receiver data/power cable (P/N 50166) connects to a
receiver connector port to supply power. It also enables the following
data exchanges:
• TSIP, RTCM, and ASCII input from an external device
The receiver is able to receive ASCII data from an external
device, convert this data into an NMEA message, and export the
message to another device. TSIP command packets configure
and monitor GPS and DGPS parameters. The receiver is also able
to accept RTCM data from an external device, such as a radio.
• CMR input from an external device
If the receiver is to be used in RTK mode, set the port that is
connected to the radio to the RtkLnk protocol. This protocol
enables the receiver to receive CMR messages.
• TSIP and NMEA output to an external device
When you are using an external radio, the receiver can also
receive DGPS corrections.
TSIP is input/output when communicating with AgRemote.
NMEA is output when the receiver is exporting GPS position
information to an external device, such as a yield monitor, or to a
mapping software program.
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
Ag252_100B_UserGuide_ENG.book Page 6 Thursday, July 28, 2005 4:06 PM