Eagle Tree OSD Pro - Manual (Page 27)

Copyright © 2009-2012 Eagle Tree Systems, LLC
http://www.eagletreesystems.com
Page 27
GPS and RADAR Configuration Menu
This menu page lets you configure GPS and RADAR display settings.
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Display Lat-Lon Position: This item lets you choose when latitude/longitude position is displayed on the main screen. The choices are:
o Never: position is never displayed
o Trouble: position is displayed when the RTH or Failsafe safety modes are invoked, or if an alarm has been triggered
o Low Alt: position is displayed for Trouble, and additionally if the model’s altitude is less than the setting you made in the
“Cruise Altitude” item in the Configure Safety Mode menu
o Distance: position is displayed for Trouble, Low Alt, and additionally if the distance of the model from home exceeds the Maximum
“RADAR Radius” item in the Configure OSD Display menu.
o Always: position information is always displayed
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RADAR Up Direction (Degrees): This parameter sets the UP direction of the RADAR feature. For example, if you fly your model so that your
body is facing 15 degrees N, you would set this to 15. This results in the RADAR icon flying up on the OSD Pro main screen when you are flying
the model in the direction you are facing. Normally, the runway is perpendicular to the direction you are facing.
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Set RADAR Maximum Radius: This sets the maximum radius for the RADAR and Waypoint display. Set this to the maximum distance away
from home that you typically fly. For example, if you normally fly a maximum of 5000 feet away from home in any direction, set this to 5000. If
your model exceeds this distance, the RADAR icon will change from normal video to reverse video, to indicate you are out of range. Likewise, if
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Set Minimum Satellite Count: Set this to a non-zero value if you wish to specify the minimum number of satellites that must be in view, before
the Home location and altitude are finalized. This setting is useful if you find that, in your area, the GPS module initially reports somewhat
invalid altitude or position information until a certain number of satellites are in view.
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Require 3D GPS Fix: Set this to YES if you wish to wait until a 3D GPS fix is attained, before the Home location and altitude are finalized. If
you are using GPS altitude rather than a barometric altitude sensor, this generally should be set to YES, as GPS altitude will not usually be accurate
unless a 3D fix is attained.
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Set Maximum HDOP: Horizontal Dilution of Precision (HDOP) is a measure of the GPS Expander’s fix quality. The lower this number, the
better the fix. The HDOP can vary with a variety of factors, including the position of the satellites in view relative to each other. As a very
general rule, HDOP less than 2.0 is highly desirable. HDOP less than 1.3 is desirable, but may not always be attainable. The default value of 9.9
essentially turns this check off. If you wish for a certain quality of fix to be attained before the Home location and altitude are finalized, set this to
a value lower than 9.9.
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Seconds to Wait post GPS Fix: Set this to a non-zero value if you wish to specify the number of seconds that must elapse after the GPS acquires
its first fix, before the Home location and altitude are finalized.
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Distance to Pilot as LOS?: Set this to YES if you want the Line of Sight distance (computed using altitude as well as ground distance) displayed
with the Distance To Pilot display. Set it to NO if you want the ground distance.