USL UPC-28 - Manual (Page 5)

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UPC-28 Instruction Manual Ultra Stereo Labs, Inc.
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UPC-28 Instruction Manual Ultra Stereo Labs, Inc.
3. Run programming with HI and VI-N audio. Set the compression slope to 2:1.
Adjust the appropriate DIP switches and input level controls to cause the audio
level LEDs to flash during normal programming, but not stay lit continuously. Try
listening to each channel on IR headphones. If necessary, adjust compression to
bring up low levels or reduce noise.
Attach the supplied mounting bracket to the wall surface and use the supplied
screws to attach the bracket to the emitter. Allow free airflow around the emitter
and be sure to have at least four inches clearance from all surfaces, preferrably
more. The rear panel is used as a heat sink and must be allowed to dissipate
heat. The emitter will cover up to 6,500 square feet (77 x 84 feet). The emitter
is typically mounted near the projector window. The panel should be “aimed”
towards the screen. This typically results in the panel being vertical and parallel
to the rear wall of the auditorium. Aiming the panel towards the screen provides
additional auditorium coverage from screen reflection.
CAUTION: The rear panel may get quite warm to the touch. This is normal.
Note that if the DC power cable needs to be extended, wire sizes in the table
below are recommended. In addition, be very careful to maintain the voltage
polarity.
Mounting the IRC-28
Extend the audio and DC power wiring as required.
Two or more IRC-28 panels may be cascaded to provide adequate coverage for
a very large auditorium. In such a case, one IRC-28 panel becomes the master
source with normal audio input(s), and level settings. An RF feed from the master
to a slave panel is carried by a 75 ohm coaxial cable (RG-59/U or similar) to the
first slave panel (RF Out of the master drives RF In of the slave). The first slave
panel then drives the second slave panel, etc. Each panel must be driven by its
own power supply. When a channel on the master panel shuts down due to lack
of audio, transmission of that channel also ceases on all slave panels. The full
power of the master and slave panels is devoted to active audio channels. If no
channels are active (no audio for 30 minutes), all transmissions cease, saving
power and increasing the IR LED life.
Installation Using Two UPC-28s
Mount additional slave panels adjacent to the master panel. Long coaxial cable
runs may introduce sufficient phase delay to cause signals to cancel instead of
add.
Cinema Processor
HI / VI - N Out