Universal Remote Control (URS) MX-500 - Manual (Page 49)

frequencies higher than the industry standard. Some
examples would be Bang & Olufsen, Kenwood (455KHz)
and older Pioneer Elite (1.125MHz). Such devices are
never preprogrammed into off-the-shelf remote controls
and can generally only be used with very specific learning
remote controls.
Infrared: "IR" A portion of the light spectrum below our
visible range, used by many modern remote controls to
transmit signals. The MX-500
TM uses IR signals.
Infrared emitter: A light emitting diode used to transmit
infrared signals from a remote control. Generally, the more
and better the emitters, the stronger and wider the resulting
signal. A remote with strong emitters can generally be used
without pointing at the desired device. Emitters 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 MX-500
TM 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
48
17. Glossary