TruTrak Pictorial Pilot - Manual (Page 7)

GPS Setup Guide
Note that the information in the tables is based upon the best information available from each manufacturer’s documentation at
the time of publication. Please consult the appropriate installation manual for confirmation of wiring information.
Portable GPS
Many new handheld GPS’s have adequate output required to fly a TruTrak autopilot. Although most support data output not
all handhelds will provide consistent and reliable information required to fly all TruTrak autopilots. Therefore, some
handhelds will not fly the airplane well. Performance may decline by putting the processor in high-load situations.
We require a data output rate of once per second for best performance. Some handhelds output data at longer intervals
than once per second. These handhelds will cause the autopilot not to perform well in turns and it may cause overshooting and
hunting. If the baud rate is selectable the optimum setting is 4800. Most handhelds will require a data cable that plugs into the
handheld and provides a medium for data output. This is an accessory and is available from your GPS manufacturer. The
setup procedures are in your GPS manual. If your GPS is not listed here consult your GPS manual for NMEA output setup.
The autopilot must have a direct connection with the handheld GPS to provide the autopilot with RS-232. To allow the
handheld GPS to be removed easily you should add a connector in your panel. We recommend that you use a 9 pin D
subminature connector in your panel that will mate to the harness from the GPS. This will also allow you to wire power and
ground and use the aircraft electrical system to power your handheld GPS.
Magellan GPS 315 A
The Magellan GPS 315 A requires a Power/Data Cable (Magellan Product Number 730276) to provide data output.
The Magellan GPS 315 A must be configured to provide the correct output to the autopilot.
Press the MENU key then select “Setup. Press ENTER. Select “NMEA” and press ENTER. Select “V2.1 GSA”
then press ENTER. Next we must set the baud rate. Press MENU then select “SETUP” and press ENTER. Next
Select “BAUD RATE” and press enter. Select 4800 for the baud rate. Press ENTER.
Note that this is the baud rate that will entered into the autopilot in the setup mode.
Garmin GPS III
The Garmin III requires a Power/data cable (Garmin Part Number 010-10082-00) to provide data output.
The Garmin III must be configured to provide the correct output to the autopilot.
Press the MENU key twice. Select ‘Setup’. Press ENTER. Select the ‘Interface’ tab. Press ENTER. Select the
NMEA format.
Note: The default baud rate is 4800. This is the baud rate that will entered into the autopilot in the setup mode.
GPS 92
The Garmin 92 requires a Power/data cable (Garmin Part Number 010-10082-00) to provide data output. The Garmin 92 must
be configured to provide the correct output to the autopilot.
Press the PAGE key until the ‘Main Menu’ appears. Select ‘Setup Menu’ and press ENTER. Next select ‘Interface.’
Press ENTER. Select NONE/NMEA.
Note: The default baud rate is 4800. This is the baud rate that will entered into the autopilot in the setup mode.
Garmin GPS 195
The GPS 195 provides data output every two seconds and may be slow in recognizing turns and will overshoot the desired
track. This may cause the autopilot to wander and not perform well in turns.
The Garmin 195 requires a Power/data cable (Garmin Part Number 010-10135-00) to provide data output. The Garmin 195
must be configured to provide the correct output to the autopilot.
Press the MENU key twice. Select ‘Set-Up Menu’. Press ENTER. Select ‘Input/Output’. Press ENTER. The
input/output format is ‘No In/NMEA Out.’ Note that the baud rate is automatically set at 4800 bps.
Note: This is the baud rate that will need to be entered in the setup mode of the autopilot.
Now the Garmin 195 is correctly set up to provide the RS-232 serial output required by your TruTrak autopilot.
TruTrak Flight Systems Pictorial Pilot Installation & User Guide
December 2009 5 8300-011 Rev B