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inSTrUCTion ManUal
3.2 range Testing
Before you operate a model for the first time it is imperative that you carry out a full range test as described in para.
7.2.6.
3.3 routine checks
The following routine checks should be carried out before every take-off:
• Check that the correct model slot is selected within your transmitter.
• Make sure that all control surfaces move in the correct direction and that they have full movement in each direction.
• Ensure that all battery packs are sufficiently charged.
• If you wish to save the data from your flight, check that a Micro SD card is inserted (see Para 5. for Data Saving).
• Any switched mixers should be checked to ensure that they work correctly.
• When the system is switched on, both the left green LED on the transmitter module ('STATUS') and the green LED on the receiver must
illuminate solidly. The transmitter module's red 'ERROR' LED must not illuminate.
• The meanings of and functions performed by the other LED's are explained in Para. 9.
A model must be secured to a solid object, anchored down or restrained by a helper before the engine is started.
When starting you engine ensure that no-one is within a radius of 3 metres of the propeller and in the case of a turbine
make sure that no-one is within 5 meters of the rear of the model.
The throttle stick must always be checked to ensure that it is in the low position before starting. This is particularly impor-
tant with electric models to prevent the engine and prop. from spinning unexpectedly.
3.4 installation
The correct installation of the receiver, battery pack, switches, antenna and cables is vital to the safe operation of the receiver system. Please adhere
closely to the instructions laid out in para. 10 of this hand book.
4 Understanding your system
The weatronic 2.4 Dual FHSS radio control system is an system exclusively developed by the company weatronic and operates within the 2.4 GHz
ISM microwave band. Users of this frequency band who are not required to be licensed are governed by the regulations set by the ETSI (European
Telecommunications Standards Institute). The ESTI is a communal body who's aim is to standardise telecommunications regulations Europe wide.
To be allowed to transmit with the maximum output of 100 mW EIRP (effective isotropic radiated power) the ETSI have set a series of regulations
governing the use of FHSS (frequency hopping spread spectrum) systems. In line with this weatronic systems use 81 channels spaced at 1 MHz and
both transmitter and receiver jump within these channels at 100 times per second following a random pattern which is individual to each trans-
mitter/receiver combination. This sequence is communicated analogically between the transmitter and the receiver and is therefore only known to
transmitters and receivers which have been bonded. If interference is experienced on any channel, such channels are excluded from use until they
become clear again and this system is called adaptive FHSS. The use of adaptive FHSS ensures that the minimum interference is caused to other users
of this band and so making maximum use of the available frequency spectrum.
Furthermore, Dual FHSS also means another two important things:
• The transmitter module is a transceiver, which means that it not only transmits a signal but receives one as well.
• The receiver contains 2 separate and independent receiver circuits and is fitted with a separate antenna for each one.
• Outward signal – the transmitter transmits a signal to the receiver to control the model – return signal – The receiver transmits data back
to the transmitter.
The transmitter antenna is a so-called polar (flat) type antenna as used in GPS navigation systems as well as mobile phones. This type of antenna
has the great advantage that the signal generated is spherical as opposed to being directional which is the case when using a dipole type antenna.
This creates a virtually equal signal regardless of where the transmitter is pointed ensuring a far greater level of reliability over the traditional 'stick'
antennas used by many systems.
Polar antennas also generate a far better signal when operating in areas with obstacles such as buildings or trees. Such obstacle deteriorate the
performance of traditional stick antennas by masking and absorbing the signal much of which is dependant upon what material the obstacle is made
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