Owner’s Manual | Model A704-5 Aviation Lighting System
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© 2008 Carmanah Technologies Corporation
Last revised: April 2008
Appendix A: Glossary
Aircraft Radio Control of Aerodrome Lighting (ARCAL):
The Aircraft Radio Control of Aerodrome
Lighting (ARCAL) feature works in conjunction with an ARCAL VHF receiver to allow aircraft pilots to
control the airfield lights. Contact your Carmanah representative for more information about this feature.
Automatic Light Control (ALC):
Automatic Light Control (ALC) is a patented algorithm that allows the
light to adjust its energy consumption to the amount of sunlight available to charge the batteries. This
ensures the light will continue to operate through periods of limited sunlight.
Autonomy:
The amount of time in hours or days that the A704-5 can continue normal operation in the
absence of sunlight.
Electrostatic Discharge (ESD):
Electrostatic discharge (in layman's terms, a shock) is a build-up of
charge difference between a person and an object, often caused by friction between synthetic materials,
or electronic equipment. ESD can easily destroy semiconductor products, even when the discharge is too
small to be felt.
Infrared (IR):
The name means below red (from the Latin infra, below), red being the color of visible light
of longest wavelength. The invisible part of light with longer wavelengths that is felt as heat radiation. The
invisible heat radiations are beyond the red end on the visible spectrum and cannot be seen by the
human eye.
Light Emitting Diode (LED):
A Light Emitting Diode (LED) is a solid-state semiconductor device that
converts electrical energy directly into light.
Self-discharge:
During storage, the charge in the A704-5 batteries will experience a normal, gradual
decrease. The chemistry of the batteries creates a small electrical current within them, and the electronics
of the A704-5 will draw an even smaller amount of electricity to keep itself ready for use. The self-
discharge is extremely low compared to the electrical currents when the A704-5 is in operation, but over
time it becomes significant enough to require the regular check and recharge intervals outlined in
Table
9-1: Recharge Intervals
.
Unique Code Sequence (UCS):
The UCS feature allows one or more controllers to be uniquely
associated to one or more A704-5 lights. When UCS is enabled, the controller sends a UCS with each
radio transmission; only lights configured to accept that particular UCS will respond to the transmission.