SkyView SE supports only a primary GPS position source. Thus, if you have an SV-
GPS-250 currently installed, and plan to install SkyView SE, the SV-GPS-250 must
be replaced with an SV-GPS-2020.
Given that the SV-GPS-2020 is physically compatible (same size, same bolt pattern,
etc.), and thus can be easily installed in place of a previously installed SV-GPS-250,
it’s understandably tempting to simply “swap” the SV-GPS-2020 in place of an
existing SV-GPS-250. However, the high integrity functions of the SV-GPS-2020
may require a different (better) installation location than was required by the SV-
GPS-250, such as installation on the upper fuselage instead of underneath the
cowling or inside a composite fuselage.
Thus, it is critical to verify the functionality of the SV-GPS-2020 at the intended
installation site on the aircraft prior to final installation.
This verification should be performed with the aircraft parked in the open with an
unobstructed view of the sky, equivalent GPS reception conditions that the SV-
GPS-2020 would experience in flight.
For example, if the aircraft is parked near a hangar during the verification, the
nearby hangar will artificially “handicap” the SV-GPS-2020’s performance by
obstructing GPS satellites in the area of the sky blocked by the hangar.
In an aircraft with an installed SV-GPS-250, admittedly the simplest installation method to
install an SV-GPS-2020 is:
Remove the SV-GPS-250
Cut the wires
Splice the wiring into the SV-GPS-2020.
To protect against a corroded connection if there is water leakage around the unit, use
a “weathertight” splice method such as solder sleeves or heat-shrink tubing.
Install the SV-GPS-2020
Configure and test the SV-GPS-2020
This the most expedient method of installation if you don’t wish to, or cannot, run new wiring
(such as you can no longer access the portion of the aircraft where the wiring is installed).
However, the SV-GPS-250 is an ideal secondary (backup) GPS unit, thus it’s worth considering
leaving the SV-GPS-250 installed, and installing the SV-GPS-2020 in addition to the SV-GPS-250.
If you wish to do so, modify the instructions for a new installation of SV-GPS-250 and SV-GPS-
2020:
Keep the SV-GPS-250 connected to Serial Port 5 (no wiring change required)
At the SkyView display(s), splice the Orange wire of the SV-GPS-250 to the Orange wire
of the SV-GPS-2020.
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