Napisal/-a Ultimate » 16.11.2004, 13:47
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Range checking
Range checking is a method of testing the RC system
which gives extremely reliable information about the
operating condition of your radio control system.
We have concocted a range-check recipe which will always
leave you on the safe side. It is based on our own
experience and measurements.
1. Move the aerial to an upright,
angled position and collapse
the segments completely
(push them together) (
9.5.2.).
2. Set up the model with the tip
of the receiver aerial about
1m above the ground.
3. Ensure that there are no large
metallic objects (e.g. cars,
wire fences etc.) in the vicinity
of the model.
4. Do not carry out the check if
there is any other transmitter
switched on - even on a different
channel.
5. The range check will not
work properly in mountainous regions.
6. Switch on the transmitter and receiver. At a range
of about 80m between transmitter and receiver
check that the control surfaces respond accurately
to the stick movements, and do not carry out any
uncontrolled movements. Close to the range limit
the servo output arms may move from their nominal
position by up to the width of the arm (servo jitter).
7. Secure the model and repeat the check with the
motor running (varying the throttle setting from
idle to full-speed).
The stated range of 80m is only a general guideline. Actual
range varies widely according to environmental
conditions. For example, in mountainous terrain or in
the vicinity of powerful radio transmitters, radar stations
or similar installations, effective range may only be half
that stated.
If radio range is restricted, what can you do to locate
the cause of the problem?
1. Change the position of the receiver aerial.
Metal or carbon fibre reinforced parts close by will
adversely affect reception conditions.
The effect of electric power systems and ignition
systems also alters if you change the position of the
aerial.
2. Disconnect the servos from the receiver one by one,
repeating the range check each time.
Over-long cables without suppressor filters have an
adverse effect on reception conditions. Servos also
deteriorate with age, and generate greater interference
than when new (brush sparking, motor suppressor
capacitors vibrated loose, general wear etc).
If you cannot effect an improvement by simple
means, try removing the complete system and operating
it outside the model. This allows you to
check whether the fault is in the system, or in the
installation in the model.