USL UPC-28 - Manual (Page 3)

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UPC-28 Instruction Manual Ultra Stereo Labs, Inc.
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UPC-28 Instruction Manual Ultra Stereo Labs, Inc.
The UPC-28 consists of: IRC-28 Emitter Panel, IRP-20 DC Power Pack,
and Mounting Brackets. The IRC-28 is UL listed for compliance with IEC
60065 audio/video and similar electronic apparatus. UL file E307263
Table of Contents
Introduction
The IRC-28 transmits two channels of audio over infrared. Channel A is transmit-
ted at 2.3MHz. Channel B is transmitted at 2.8MHz. Both carriers are frequency
modulated. Channel A is normally used to carry the Hearing Impaired audio,
while channel B is normally used to carry the Visually Impaired - Narrative audio.
1 Ethernet Connector (IRC-28C Only)
2 and 6. Input audio level range switches for channels A & B.
With both switch keys in the “up” position, the input range is 0.1 to 1.0
Volts rms. In the down position, the range is 2 to 20 Volts rms.
3 and 7. Input audio level adjustments for channels A & B.
4. and 8. LED audio level indicators for channels A & B.
5 and 9. Compressor slope adjustments for channels A & B.
Increasing compressor slope improves intelligibility of low level dialog.
10. Main Connector; consisting of the following:
a. Pins 1 & 2: DC Power Input Terminals.
Connects to the DC terminals of the 32VDC Power Pack
supplied with the IRC-28. Red wire connects to + terminal (pin 1)
connection.
b. Pin 3: Chassis Ground Terminal.
The DC power supply connects the AC safety ground to its nega-
tive output. No connection is required to this terminal.
c. Pin 4: Audio System Ground.
Safety Instructions........................................................2
Introduction...................................................................3
Installation.....................................................................4
Configuration & Test......................................................5
Mounting the IRC-28.....................................................6
Installing Two UPC-28s................................................7
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s
instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polar-
ized plug has two blades with one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong are provided for
your safety. If the provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, con-
venience receptacles, and the point where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with the cart, stand, tripod, bracket, or table specified by the manu
facturer, or sold with the apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms or when unused for long periods of
time.
14) Refer all servicing to qualified service personnel. Servicing is required when the ap-
paratus has been damaged in any way, such as power-supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate normally, or has been dropped.
WARNING
To reduce the risk of fire or electric shock, do not expose this appliance to rain or mois-
ture.
IMPORTANT SAFETY INSTRUCTIONS