GRT Avionics HXr Installation Manual
Revision A -5 2-19
2.3 GSNS (GPS) from the Adaptive AHRS
The GADAHRS can include an optional GPS receiver, or more accurately, a satellite navigation
receiver. This receiver can be configured to receive multiple constellations of navigation data, such
as the data from the US GPS system, the Russian Glonass, as well as Japanese and European systems
that are being developed.
Configuring the Serial Port for GPS Data Input
The GPS data provided by the GADAHRS is transmitted via its serial data output. The serial input
used to receive this data must be configured for GPS NMEA0183, 9600 baud.
The output from this GPS may be shared with all GRT EFIS display units as desired, as well as at
least two other devices, such as an ELT, transponder, etc. If these other devices impart too much
load on the serial output, the signal level will be reduced and some or all of these device will receive
no data.
Configuring the Serial Port for data to the GPS
An optional serial output from the display unit, to the GPS may also be made. If this connection is
not made, the GSNS will default to using all satellite constellations (not just the American GPS
system), and will be set to 1 position update per second. By making this connection, the satellites
used can be limited to the American GPS system only. We recommend allowing all satellite types,
Fig 2-1. AHRS to Mag Orientation
(Applies to Legacy AHRS (Does not apply to adaptive AHRS).
