ROBBE-Futaba R6108 SB Fasst Manual De Uso página 11

theless, component manufacturers cannot guarantee these higher
values on account of production tolerances
.
We therefore recommend that you take due care and attention and
observe the following points:
• It is recommended to use a voltage stabiliser set to approx. 7.5 V
when using 2 LiPo cells. As the voltage differences between a fully
charged and partially discharged LiPo battery are very large, this
would otherwise result in considerable differences in servo speeds.
• LiPo cells with a voltage converter generate heat and should not
be placed in the same mounting recess as or too close to the recei-
ver.
• To prevent the material and electronics from heating up excessi-
vely, do not leave models in the car on hot, sunny days
.
• Ensure good ventilation or, even better, take the model out of the
car and place it in the shade of the car.
• The fuselage and RC components will readily heat up as the result
of the sunshining through canopies that are transparent or painted
in light colours. Remove the canopy to provide air circulation in the
fuselage or cover with a light-coloured cloth.
• Cover dark models with a cloth or place in the shade.
• Never leave slim-line/black carbon fibre-reinforced/glass fibre-
reinforced fuselages with integrated receiver in the car or in strong
sunlight.
• Do not mount the receiver in the vicinity of motor and exhaust
systems as the radiated heat can cause the receiver to heat up
excessively.
• Insulate silencers running through the fuselage, e.g. with balsa
cladding to avoid high temperatures in the fuselage.
• Take steps to ensure air circulates through the fuselage.
• If necessary, provide ventilation openings in the canopy or fuse-
lage.
Additional information on other RC components
The above recommendations are beneficial not only to receivers but
also to other electronic components.
• Heat sinks in speed controllers that have already been subjected
to thermal load do not disspate heat as effectively and are more
susceptible to overload in operation.
• The energy output of LiPo batteries deteriorates (by approx. 45-10
%) as from temperatures of approx. 12 °C, thus reducing the per-
formance of your model.
• The power output of servos is also partially reduced at high tem-
peratures - the higher the temperature of the motor winding, the
poorer the efficiency. This means, at a temperature of about 55
°C, the power output of a servo is up to 20 % less than when cold.
This limit is quickly reached by the high heat build-up of the servo
motor.
General information on 2.4 GHz RC systems
• In general, the range of the 2.4 GHz FASST system is greater than
that of 35 MHz systems. The range is approx. 2000 metres close
to the ground and more than 3000 metres in the air. The weather
conditions and obstacles that reduce range as described in the fol-
lowing therefore do not impair operation but rather simply affect the
reserves.
• Larger obstacles between transmitters and receivers can dampen
or block signals.
• When close to the ground, damping of the transmission signal is
greater than is the case with 35 MHz systems. The range close to
the ground can be reduced on foggy/misty days and/or when the
ground is wet.
• The range can be drastically reduced when a model is close to
the ground and an obstruction (person, vehicle, object, etc.) moves
between the transmitter and receiver.
• The propagation of 2.4 GHz signals is virtually linear. This means it
is necessary to always keep visual contact with the model.
• The FASST receivers R607, R617, R608, R6008, R6108 and
R6014 are equipped with a diversity system with 2 aerials and
corresponding input stages. This system continuously checks the
signal level of both aerial inputs and switches over in a split second
to the stronger signal with no transition period.
• When the two aerials are aranged at an angle of 90° with respect
to each other, the normal position dependency achieved with only
one aerial is greatly improved, thus considerably enhancing recep-
tion.
• The PRE-VISON software permanently scans the input signal
and corrects any erros if necessary.
• Both aerials should be installed extended.
• The angle of the aerials in relation to each other should be approxi-
Diesen Bereich möglichst gestreckt
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Antenne Koaxial Kabel
mately 90°.
• Large models often have larger metal parts which could dampen
RF reception. In such cases, position the aerial to the left and right.
• The aerials should not be installed parallel to and should be placed
at a minimum distance of 1.5 ... 2 cm from:
• Metal, carbon, cables, bowden cable, wire controls, carbon push
rods, carbon rovings, etc.
• Current-carrying (live) controller or motor cables
• Spark plugs, spark plug heaters
• Locations subject to static charge such as toothed drive belts, tur-
bine, etc.
• Lead aerial the shortest way out of fuselages with shielding materi-
als (carbon, metal, etc.)
• Do not secure the ends of the aerials either on the inside or outside
of electrically conductive materials (metal, carbon)
• This does not apply to the coaxial cable but only to the end area of
the aerial.
• When installing the coaxial cable avoid tight radii and kinks.
• Protect receivers from the effects of moisture.
Notes on installing 2.4 GHz FASST receivers:
• Use a low-resistance NC or NiMH battery as the power supply.
• Clocked BEC systems for supplying power must be sufficiently
dimensioned. If the voltage drops below a value of 3.8 Volt when
under load, the receiver must reset and restart, involving signal loss
for approx. 2-3 seconds. To prevent this happening, the receiver
should be fitted with RX capacitors which bridge temporary
voltage dips (RX capacitor 1800 μF No. F 1621 or 22,000 μF No.
F1622).
• Thanks to their high intermediate frequency of 2.4 MHz, FASST
800 GHz receivers are relatively immune to electrosmog (such as
click pulses, RF radiation, static charge, etc.) as they only have a
low amplitude at frequencies above 300-400 MHz. In connection
with electronic devices that are known to emit interference, under
unfavourable conditions it may be necessary to fit an interference
suppression filter No. F 1413 to shield the receiver from this soure
of interference. A range test will show whether such a filter is
necessary.
Corresponding precautions should be taken on the model to
avoid strong static charge: Helicopter:
• Connect an earthing strap between the tail boom and chassis.
If necessary, fit a „copper brush" on toothed belt drive units in order
to carry charge away from the drive toothed belt. If necessary, also