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Winkler, Manitoba Canada | I found an old Trimble bulletin that outlines the same problem you are mentioning, that of the Greenstar display not accepting NMEA correction better than WAAS. Their solution seems to limit the NMEA GGA accuracy message to a 2, or WAAS standard, even if they were running something better.
So the simple solution to the problem seems to be to get your system to suppress the RTK accuracy message in the GGA NMEA sentence and replace it with the DGPS message even if you are running RTK. The second solution is to get a third party filter to do this.
The manual for the 2630 does mention connecting third party gps receivers on pages 135-1 to 135-3 but does not mention any limitation on the accuracy of the NMEA message.
Quote from manual:
Connecting RS-232 GPS Receivers
NOTE: AutoTrac requires CAN GPS messages
from a StarFire receiver.
Non-John Deere GPS receivers that output correct NMEA
0183 standard messages can be used for documentation
and manual guidance on GreenStar application. It is
critical that receiver is setup to output following messages:
• GGA
• GSA
• RMC setup at 19200 baud (This is fixed and
Non-adjustable)
• Data Bits 8
• Parity none
• Stop 1
• Flow Control none
• 1 or 5 Hz output rate (Recommend operation at 5 Hz.
Guidance requires 5 Hz.)
Without these messages, receiver will not function with
GreenStar application.
A harness and installation instructions are available to
connect DB9 port of receiver to correct pins of display
connector. See a John Deere dealer for more information
Edited by WTW 2/6/2016 11:33
Attachments ---------------- NMEAtoGS2display(2)(1).pdf (304KB - 404 downloads) greenstar_3_2630.pdf (11409KB - 5829 downloads)
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