Ag Leader PF3000 Cotton Yield Monitor Operators Manual - Manual (Page 82)

PF3000 Cotton Yield Monitor
Using a GPS Receiver Ag Leader Technology
March 2002 4-14
Introduction You can connect a GPS receiver to the PF3000 to collect field position
information for making a map. The GPS receiver sends the exact
coordinates in degrees latitude and degrees longitude to the monitor every
second. You must use a memory card with the monitor to record GPS
position information.
NOTE: If you are using the Add-On GPS 3000 or 3100, refer to the Add-
On GPS General Instructions you placed in the Options Section for specific
instructions.
Compatible GPS
Receivers Almost all GPS receivers made for agriculture applications are compatible
with the PF3000 and thus meet the requirements listed below. Ag Leader
Technology sells a Coast Guard compatible receiver, the Add-On GPS 3000
and also a machined Coast Guard and Satellite differential compatible
receiver, the Add-On GPS 3100. Receivers other than the Add On GPS
3000/3100 must be configured to send GPS data according to the following
parameters:
•
NMEA standard data output protocol
•
4800-X-8-1 communications protocol
•
GGA data string—the only data string needed
•
Send all messages once per second
NOTE: If you use the Ag Leader GPS 2000 or GPS 2100 , Trimble AgGPS
120, 122, 132 or other high accuracy receiver that outputs the VTG data
string, you can obtain ground speed readings from the GPS signal. If you
are using the Add-On GPS 3000/3100, you can get ground speed from it
also, but outputting the VTG string does not apply.
Mounting a GPS
Receiver Follow the mounting instructions provided with the GPS receiver. Some
general guidelines are listed below for mounting the receiver on a vehicle.
•
Make sure the GPS antenna is in the middle of the vehicle.
•
Generally, the antenna should be the highest point on the vehicle.
•
Keep the antenna away from "electrical noise" sources, such as a cab fan
motor or the engine compartment.
•
On most cotton harvesters, the center of the cab is the highest, safest
place to mount the GPS antenna.