Trimble Outdoors AgGPS 252 - Manual (Page 39)

AgGPS 252 Receiver User Guide 33
Configuring the Receiver 4
Configure the Port Input/Output communication settings for
communicating with the AgGPS Autopilot, other external hardware
devices, and software programs. Table 4.1 describes the input settings.
The default port settings are:
Table 4.1 Port input settings
Setting Description
None Inputs nothing to the receiver.
TEXTB The receiver can accept ASCII data from an external device, such
as a chlorophyll meter, on Port A, merge it with NMEA GPS data,
and output the combined data on Port B. The incoming data
must be limited to 66 ASCII characters and terminated by a
carriage return and line feed (hex characters 0x0D 0x0A). The
NMEA string outputs as $PTNLAG001,characters>*<2 digit checksum>. For the receiver to
output the combined NMEA string, NMEA must be selected as
the output protocol on Port B.
TEXTA See the description for the TEXTB setting (above). TEXTA input
outputs text on Port A. The default port settings are 8-N-1 TSIP
38.4 K. These may vary by product.
RTCM The receiver can accept RTCM data from an external DGPS device,
such as an external radio.
TSIP The receiver can accept or output TSIP data packets from the port
when using the optional AgRemote program or using the AgGPS
170 Field Computer.
RtkLnk The receiver can accept real-time corrections (CMR data) from an
external device such as a Trimble radio.
Port A Port B
Baud rate In TSIP 38,400 TSIP 38,400
Out TSIP 38,400 TSIP 38,400
Data bits 8 8
Parity None None
Stop bits 1 1
Ag252_100B_UserGuide_ENG.book Page 33 Thursday, July 28, 2005 4:06 PM