Copyright © 2010-2014 Eagle Tree Systems, LLC
http://www.eagletreesystems.com
Page 21
The Telemetry Function
The EagleEyes, when coupled with our Windows Data Recorder software program, provides telemetry display of many of the Eagle Tree sensors
which are connected to your OSD Pro. In addition to displaying the telemetry, the software can save the telemetry to a file for later use, graph the
telemetry data in real time or postflight, and show the GPS telemetry data in Google Earth
TM
. An example of the telemetry software screen is shown
below.
To utilize the telemetry function, just connect a USB mini-B cable
(not included) between your PC, notebook, or netbook, and the
EagleEyes. Then, make sure telemetry is being received by the
EagleEyes – the “Telemetry” LED should be flashing. Next run
the software, and click “Live Mode.” Then, telemetry data should
be displayed on the Data Recorder screen. Please see the manual
that came with your eLogger or Data Recorder for more
information on using the PC software.
NOTE: make sure that you have connected the EagleEyes to USB
before powering the EagleEyes with the barrel power connector,
for proper USB operation. Also, note that it is not necessary to
power the EagleEyes via the barrel connector when it is connected
to USB, unless you are using the antenna tracker function.
Note that in some cases the data displayed in the PC software
could be different than the data displayed on the OSD Pro:
Some parameters, such as voltages, speeds, and
altitudes, will be slightly different in the PC software than on the OSD Pro screen. This is because the software uses slightly different
algorithms for computing and averaging these parameters. But, the differences should be small.
The first barometric altitude and airspeed readings received by the software are treated as the “zero” values, when Live Mode is invoked.
So, it’s important to start Live Mode before the model is moving.
The “Home” point is set as the first GPS fix received by the software after Live Mode is started. So, it’s important to start Live Mode after
the OSD Pro has established its home position, but before the model is moved. Otherwise, the “Distance to Pilot” parameter displayed in
the software will be different from the Distance parameter displayed on the OSD Pro.
The software only displays ground distance, and does not take into account the altitude. But, the OSD Pro lets you choose whether to
calculate “LOS” distance using altitude and ground distance.
GPS Altitude displayed in the software is NOT zero referenced. In other words, if the GPS is reporting the MSL altitude at your home
location as 300 feet, the OSD Pro will display “0” since it zero references the GPS altitude, but the software will display “300”.
The units in the software are either English or Metric. The same applies to the OSD Pro, unless units other than the default units are
chosen for speed, altitude, etc., in the OSD Pro’s onscreen menus.
Happy Flying!
