ROBBE-Futaba R6014 HS Bedienungsanleitung Seite 8

• If a model is close to the ground, and if an obstacle (person, vehi-
cle, object etc.) moves between the transmitter and the receiver,
then effective range may be significantly reduced.
• 2.4 GHz signals radiate from the transmitter virtually in a straight
line, for which reason it is essential to maintain visual contact with
the model at all times.
• The FASST R R607, R617, R608, R6008 and R6014 receivers fea-
ture a diversity system with dual aerials and corresponding input
stages. This system constantly checks the signal level at both
aerial inputs, and switches lightning-fast to the stronger signal,
without any interruption.
• Arranging the two aerials at an angle of 90° to each other signifi-
cantly improves the attitude-dependency which is usual with a
single aerial, and this in turn provides a clear improvement in
security of reception.
• The PRE-VISION software constantly scans the input signal, and
carries out error-correction as and when necessary.
To obtain optimum reception results, please note the following
points regarding aerial deployment:
• The two aerials should be deployed in a straight line.
• The angle between the two aerials should be approximately 90°.
Aerial
This part should be as straight as
possible
• Large models often contain quite large metal parts which may
have a damping effect on RF reception; in such cases the aerials
should be positioned to left and right of the offending object.
• The aerials should not be deployed parallel with each other, and
should always be positioned at least 1.5 to 2 cm away from the
following items:
• Anything made of metal or carbon, electrical cables, control 'sna-
kes', control cables, carbon fibre pushrods, carbon roving reinfor-
cements, etc.;
• High-current speed controller cables and motor leads;
• Sparkplugs, glowplugs, glowplug heating circuits;
• Locations liable to static charge build-up, e.g. toothed belts, tur-
bines etc.
• Where the fuselage includes materials with a shielding effect (car-
bon, metal, etc.), route the aerials out of the fuselage by the shor-
test possible route.
• The aerial ends should never be attached to electrically con-
ductive materials (metal, carbon) either inside or outside the
model.
• This applies not only to the co-ax cable but also to the end part of
the aerials.
• Avoid bending the co-axial cables through tight radii, and do not
kink the leads.
• Protect the receiver from damp at all times.
Notes on installing 2.4 GHz FASST receivers:
• Wherever possible the receiver should be powered by batteries
consisting of low-impedance NC or NiMH cells.
• Pulsed BEC systems used as receiver power supplies must be
adequately specified; if the voltage under load falls below 3.8
Volts, then the receiver will carry out a reset and restart, which
equates to a period of signal loss lasting about two or three
seconds. This can be prevented by using so-called RX capacitors
at the receiver, which bridge brief voltage collapses (RX capacitor,
1800 µF, No. F 1621 or 22.000 µF, No. F 1622).
Co-axial cable
R6014HS receiver
• FASST 2.4 GHz receivers are relatively immune to 'electro-smog'
(such as metal-to-metal noise, stray RF signals, static charge
effects, etc.) due to their high intermediate frequency of 800 MHz.
At frequencies of about 300 - 400 MHz and higher the amplitude
of these effects is quite small. Certain supplementary electronic
devices are known to be powerful sources of interference, and
under unfavourable circumstances it may be necessary to install a
suppressor filter, No. F 1413, in order to keep such interference
from the receiver. A range check will show up whether this type of
filter is actually required or not.
To prevent the build-up of powerful static charges certain measu-
res are required at the model.
Helicopters:
• Use an earthing strap to connect the tail boom to the chassis.
Toothed-belt tail rotor drive systems may require a "copper brush"
to dissipate electrical charges from the toothed belt. It may also
be necessary to connect the toothed-belt pulleys electrically to
the chassis.
• In electric-powered model helicopters it is generally necessary to
connect the tail boom to the motor case.
• If the model is fitted with CFRP / GRP blades and a carbon fibre
tail boom, massive static charges can be generated at high rota-
tional speeds when air humidity is low. To avoid this an electrically
conductive connection should be present between the tail rotor
gearbox and the main rotor shaft. The use of anti-static sprays
(e.g. Kontakt Chemie) has also proved effective.
Turbines:
• Connect an earthing strap to the turbine shielding plate to prevent
the build-up of static charges.
• The high airspeeds of fast GRP model jets can result in high static
charges (around 40,000 Volts), especially in conditions of low
humidity. If this produces a problem, all the model's GRP compo-
nents with a surface area larger than about 10 cm² should be inter-
connected using an electrically conductive material.
• Turbine connections which are routed out of the fuselage (fueltank
connections, etc.) should also be connected to each other electri-
cally in order to avoid static charge problems. Static charges
affecting the refuelling hose can even have the effect of operating
shut-off valves.
• The tyres of the aircraft's undercarriage can also provoke static
charge effects, and should therefore be fitted with copper brus-
hes.
Range-checking:
• We recommend that a range check should be carried out every
time before you fly a new model, or fly a model fitted with a new
receiver. Note that the model should not stand on the ground for
the check: it should be raised above the ground by about 1 to 1.5
m. Use a plastic or wooden table, box, carton etc. as a support -
never a metal object (camping table, etc.). No electrically con-
ductive objects (fences, cars. etc.) should be in the vicinity, and
your assistant should not stand too close to the model.
• Start by switching the system on, but leave the motor or engine
switched off. Walk slowly away from the model, and operate one
control function slowly but continuously.
• While you increase the range, carefully watch the control function
on the model, and observe whether it follows the stick movement
accurately, or occasionally stops or wavers. You may find it easier
to ask a friend to watch the control function from a certain dis-
tance. Turn the transmitter to left and right as you increase the dis-
tance from the model, in order to simulate different aerial positions
relative to the model.
• In Power-Down mode (range-check mode) you should achieve a
range of about 50 m. In most cases the ground-range will be
about 80 to 120 m, which is a very good result. If the value is only
about 40 m or less, then you should certainly not fly the model:
seek out the cause of the problem and eliminate it before flying.
• If this initial range-check is successful, repeat the whole proce-
dure with the motor running (caution: secure the model well befo-
rehand). The range now achieved should be the same or only
slightly less (approx. 20% reduction is acceptable). If the ground-
range is substantially reduced, then the power system is causing
interference to the receiver. Running through all the measures lis-
ted above should enable you to cure the problem.