Operation
Check that all the items on the delivery note have been supplied, before you
assemble your system.
Please report any shortages immediately. We have less
sympathy with a claim that goods were not supplied after the hire has ended, than
we have for a shortage reported at the beginning.
In particular, note the number of tie clip microphones and their associated clips.
Both can remain attached to costumes, and just vanish at the end of the show!
Connect receivers to mixer inputs and attach all aerials.
Single kits have their aerials attached, and these need only to be extended and set as
shown in the cover picture.
Multi-channel kits are supplied with 2 Dipole aerials that are connected to the ADA
(Aerial Distribution Amplifier) and this supplies RF signals to all receivers. Dipole
aerials should be a minimum of 3 metres apart. Set with the elements vertical. Note
that on UHF aerials there is a moulded ‘E’. This is to show which element should be
at the bottom. VHF aerials have a whip for the upper element, and a helical for the
lower.
Failure to set aerials correctly can affect performance in a marked manner. It is
worth spending time experimenting with aerial location, for a small change can
often transform system performance.
Where we have supplied a flightcased system, you should note that we number the
transmitter, it’s receiver and output cable with corresponding channel numbers.
Power up by connecting to the mains and remember to switch on the ADA (Aerial
Distribution Amplifier). Failure to switch on the ADA will not prevent operation, but
the loss of RF signal will drastically affect performance.
Receivers lock onto the strong signals of their matching transmitters. In the abscence
of such a signal they will accept unwanted interference (known as intermodulation
interference - often shortened to ‘intermod’ ), which can light several segments of the
RF display. There is usually little or no audio present, but it can be confusing if
displays light on channels you weren’t expecting!
Failure to set aerials correctly can affect performance markedly. It is worth
spending time experimenting with aerial location, for a small change can often
transform system performance.
Always test multichannel systems with all transmitters switched on.
