NXG Technology NX-RM505 - Manual (Page 48)

17. Glossary
Infrared: ‘IR’ A portion of the light spectrum below our visible
range, used by many modern remote controls to transmit signals.
The NX-RM505 uses IR signals.
Infrared emitter: A light emitting diode used to transmit infrared
signals from a remote control. Generally, the more and better the
emitter, the stronger and wider the resulting signal. A remote with
strong emitter can generally be used without pointing at the desired
device. emitter are also partially responsible for any limits on the
range of frequencies that can be controlled. Emitters are always
placed at the ‘top’ of a remote control and are typically shielded by
a red plastic window. The NX-RM505 has 2 very strong IR emitters.
Infrared receiver: The portion of a device that receives infrared
commands from a remote control. Since infrared is actually light, it
requires line-of-sight visibility for best operation, but can still be
reflected by items such as walls and glass. Poorly placed IR
receivers can also result in what is called ‘tunnel vision’, where they
are set so far back into the chassis of a device that the operational
range of any remote control is severely reduced.
Joystick: A feature on some remote controls, the joystick is a single
pointer which replicates five functions for menu control: up, down,
left, right and enter. The Joystick on the NX-RM505 can be pro-
grammed with other commands as well. The Joystick on the NX-
RM505 is sometimes referred to as a thumb pad.
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