Eagle Tree OSD Pro - Manual (Page 5)

Copyright © 2009-2012 Eagle Tree Systems, LLC
http://www.eagletreesystems.com
Page 5
b) In the OSD Pro on-screen menus, under the "Sensors and Units" menu, set "Use Temp1 Input for RSSI" to "Yes".
c) With the Rx RSSI output connected to the eLogger, run the "Servo Analysis Wizard" either from the PC, or with the stick menus, as described in the
Servo Analysis Wizard section of the manual below. While you run the wizard, you will be prompted to turn off and turn on your transmitter. When you do
this, the OSD Pro notices the minimum and maximum RSSI levels, and calibrates these to 0% RSSI and 100% RSSI, respectively.
d) If desired, there are menu options under "Radio Control Configuration" menu to let you recalibrate the minimum and maximum RSSI readings (0%
reading and 100% readings). For those who want the minimum RSSI to represent the point just before failsafe starts to occur, rather than the point when the
transmitter is turned off, you can calibrate the minimum using this option. A good time to do this is during your antenna-down range test, just before the
servos start to twitch.
Impedance Issues: The input impedance of the Temperature 1 input is approximately 5K Ohm. Some receivers, such as early versions of the “LRS” long
range receiver, require higher impedance to correctly report RSSI. The symptoms of this issue are loss of range, and/or random or otherwise incorrect
display of RSSI after following the above steps. If you want to use RSSI with early LRS or other receivers that require higher impedance, the best option is
to use a high impedance input buffer that can be placed between the receiver's RSSI output, and the eLogger's Temperature 1 input. Such a buffer is
available at
http://www.dpcav.com/xcart/product.php?productid=16500 .
Artificial Horizon Display
When you use the Guardian Stabilization Expander, you can display a real-time, graphical Artificial Horizon Indicator (AHI) on the OSD display. The AHI
display can be turned on and off via the PC software, as described in the Configuring Graphics Display section below, and can also be switched on and off
via the OSD on-screen menus.
Also, when the
FMA Direct™ CPD-4™ X/Y horizon sensor (either with our without the FMA™ stabilization Computer), an artificial horizon line can be
displayed on the video screen. Information on how to connect the FMA Direct sensor to the OSD Pro system, and configure the Artificial Horizon display,
can be found in this document:
http://www.eagletreesystems.com/support/manuals/FMA-OSD-Pro.pdf
Serial PPM Support
If your receiver outputs a serial PPM stream (also known as “PPM sum”) you may be able to connect your OSD Pro to your Receiver with only one male to
male servo connector.
See the “Serial PPM” section in the manual below for more information.
Tips for Using your OSD Pro
Adjusting the OSD Display Appearance
Normally the OSD Pro display does not need to be adjusted, but several adjustments are provided for centering the screen, controlling the brightness of the
display, changing the width of the display, etc. Please see the “Configure OSD Display Menu” on-screen menu description below for more information.
GPS Mounting Tips
It is important that the GPS is mounted as far away from your video transmitter as possible. This is because some video transmitters radiate radio frequency
energy that is on the same frequency as GPS satellite signals. This can cause the GPS module to receive a poor GPS signal, or no signal at all. This
issue is most commonly reported with 900MHz video transmitters. Our GPS-V4 and later GPS models have a built in ferrite core in the cable, which
reduces the effects of this RFI on GPS signal. A good description of the causes and solutions of this problem (and instructions on installing a ferrite core if
your GPS doesn’t have one already) is located here:
http://www.dpcav.com/data_sheets/whitepaper_RFI.pdf
GPS Fix Quality
Many of the features of the OSD Pro, including the RADAR, distance display, and altitude, depend on a good initial GPS fix before finalizing the “home”
position. When GPS modules first get a fix, the position and/or altitude may not be accurate, and subsequent fixes may have greater accuracy. The OSD
Pro has several adjustments to ensure that the home position is correctly finalized. See the “GPS, RADAR, Timer and Waypoint Settings Menu” on-screen
menu description below for more information.
Using the OSD Pro with non-Eagle Tree Stabilization Systems, such as the FMA
TM Co-pilot TM
The OSD Pro should work well with all available stabilization systems, though they are not as well integrated as the Guardian Stabilization Expander. If
you plan to use Return to Home feature with a stabilization system, please see the “Stabilization System Connection” section in the Safety Mode portion of
the manual.
Connecting your OSD Pro Hardware
The OSD Pro should work well with any FPV video transmitter, FPV camera, and an optional microphone. Since cameras, video transmitters and
microphones from different manufacturers all have different connections, it’s important to understand how things should connect together before proceeding
with connections. In addition to the information provided in this manual, user note that there are many user supplied wiring diagrams for the osd Pro online
at
http://www.rcgroups.com/forums/showthread.php?t=1286603