Advanced Range Testing - Spektrum AR7110 User Manual

Advanced Range Testing Using a Flight Log
The Standard Range Testing procedure is recommended for most sport aircraft. For
sophisticated aircraft that contain significant amounts of conductive materials (e.g.
turbine powered jets, some types of scale aircraft, aircraft with carbon fuselages,
etc.), the following advanced range check will confirm that all remote receivers are
operating optimally and that the installation (position of the receivers) is optimized
for the specific aircraft. This Advanced Range Check allows the RF performance
of each remote receiver to be evaluated and to optimize the locations of each
individual remote receiver.

Advanced Range Testing

1. Plug a Flight Log into the data port in the AR7110/AR7110R and turn on the
system (Tx and Rx).
2. Advance the Flight Log until frame losses are displayed by pressing the button
on the Flight Log.
3. Have a helper hold your aircraft while observing the Flight Log data.
4. Standing 30 paces away from the model, face the model with the transmitter in
your normal flying position and put your transmitter into range test mode. This
causes reduced power output from the transmitter.
5. Have your helper position the model in various orientations (nose up, nose
down, nose toward the Tx, nose away from the Tx, etc.) while your helper
watches the Flight Log noting any correlation between the aircraft' s orientation
and frame losses. Do this for 1 minute. The timer on the transmitter can be used
here. For giant-scale aircraft, it' s recommended that the airplane be tipped up
on its nose and rotated 360 degrees for one minute then the data recorded. Next
place the airplane on its wheels and do a second test, rotating the aircraft in all
directions for one minute.
6. After one minute, a successful range check will have less than ten recorded
frame losses. Scrolling the Flight Log through the antenna fades (A, B, L, R)
allows you to evaluate the performance of each receiver. Antenna fades should
be relatively uniform. If a specific antenna is experiencing a high degree of fades
then that antenna should be moved to a different location.
7. A successful advanced test will yield the following:
H - 0 holds
F - less than 10 frame losses
A, B, R, L - Frame losses will typically be less than 100. It' s important to com-
pare the relative frame losses. If a particular receiver has a significantly higher
frame loss value (2 to 3X) then the test should be redone. If the same results
occur, move the offending receiver to a different location.
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