UPC-1/UPC-2 Installation Manual
11
January, 1999
FACTS ABOUT
INFRARED TRANSMISSION SYSTEMS
The UPC-1/UPC-2 Infrared Transmission Systems use light emitting diodes
frequency modulated at 95 KHz, the international standard. All commer-
cially available emitters and receivers will be compatible with this stan-
dard.
The modulated waves radiate from the emitter panels primarily in straight
lines. Depending on the lightness of the wall color, some of this energy
may be reflected and bounce around the room. Infrared energy does not
penetrate walls. The modulated waves remain within the room where the
emitter is placed. This feature makes it perfect for use in multiplex theatre
units and for use in hotel and convention center meeting rooms and
auditoriums. Additionally, this characteristic of infrared transmission
makes it ideal for meetings requiring security of the signal.
USL, Inc. provides the following 95Khz headsets:
IRH-601 – an over-the-head receiver designed with a 360˚ pickup.
IRH-701 – an under-the-chin receiver with a 180˚ pickup.
IRH-801 – a clip-on receiver used in connection with a neck loop or
used with a cable connected to a cochlear hearing device.
