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Range Testing
Before each flying session, and especially with a new model, it's important to
perform a range check. All Spektrum aircraft transmitters incorporate a range
testing system, which reduces the output power to allow a range check.
1.
With the model resting on the ground, stand approximately 100 feet (30
meters) away from the model.
2.
Face the model with the transmitter in your normal flying position and put
your transmitter into range test mode.
3.
You should have total control of the model in range test mode at 100 feet.
4.
If you have control issues, review the flight log data to help reposition your
antenna(s), and repeat the range test.
5.
If control issues persist, call Horizon Product Support for further assistance.
Advanced Range Testing
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, scale aircraft with metalized finishes,
aircraft with carbon fuselages, etc.), the following advanced range check will
confirm that all receivers in the system are operating optimally as installed.
This advanced range check allows the RF performance of each receiver to
be evaluated independently. A telemetry-equipped Spektrum Transmitter is
required for the advanced range test.
1.
Stand approximately 100 feet away from the model.
2.
Face the model with the transmitter in your normal flying position and put
your transmitter into range test mode.
3.
Have a helper position the model in various orientations (nose up, nose
down, nose toward the transmitter, nose away from the transmitter, etc.).
4.
Observe the telemetry on your transmitter. Note any orientations that cause
higher fades or frame loss values. Perform this step for at least one minute.
5.
Reposition any remote receivers showing higher fades as necessary.
6.
Retest to verify satisfactory results.
7.
Repeat as neccesary.
After one minute, advanced testing should yield:
H - 0 holds
F - Fewer than 10 frame losses
A, B, L, R - Fades will typically be fewer than 100. It's important to compare the
relative fades. If a particular receiver has a significantly higher numnber of fades
(2 to 3X) then the test should be redone. If the same results occur, move the
offending receiver to a different location.
TIP: Use the fade values for the 4651T telemetry remote receiver to investigate
the performance of the telemetry link.
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