TeeJet Matrix Pro 840G User Manual - Manual (Page 65)

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External Receiver Minimum Configuration Requirements
Before the Matrix will connect and work with an external GPS
receiver, these minimum configuration requirements must be met.
Serial Port Settings
Baud rate: 19,200
Data Bits: 8
Parity: None
Stop Bits: 1
Serial Port connection requirements
Male 9 pin RS-232 serial cable
NOTE: May require Null modem adapter depending on pin
out of receiver.
NMEA Strings
GGA 5 Hz
Optional VTG 5 Hz, 2 Hz, Off
ZDA 0.2 Hz
GPS Status
GPS Status displays information regarding data rates, number of
satellites in view, and satellite quality and ID.
1. Press
Information .
2. View data including:
◄GGA/VTG (Data Rates) – the number of GPS positions per
second
◄Num Sats – the number of GPS satellites in view (minimum of
4 are required for DGPS)
◄HDOP – a measure of satellite geometry strength in the
horizontal plane. A HDOP value of less than 2 is preferred
◄PRN – the current DGPS satellite ID.
◄GGA Quality – the current quality indicator of the GPS signal.
(see GGA chart)
◄Receiver – the current indicator of the receiver
◄Version – the software version installed on the receiver
3. Press OK to return to GPS setup screen
Figure 6-56: GPS Status
Config->GPS
GPS Status
GPS Port
GPS Type
information
internal
GPS/dGPS
Config->GPS
GPS Status
GPS Port
GPS Type
information
internal
GPS/dGPS
GPS information
GGA Rate: 5 Hz
VTG Rate: 5 Hz
Num Sats: 10
HdOP: 1
PRN: 135
GGA Quality: 2
Receiver: 1
Version:
OK
NOTE: If GPS is not available, all entries will be “Invalid”
GGA Requirements
GGA Quality required to be able to work with various types of signal
can vary. See table below for requirements.
Service Indicator Accuracy
GPS only 1 <3 m
WAAS/EGNOS/Beacon 2 <1 m
RTK 4 4 cm
OmniStar HP/XP 5 10 cm
ClearPath®/Glide 9 <1 m