Infrared light reflects off most surfaces and scatters,
which increases the coverage area. Rough surfaces
tend to absorb infrared light, minimizing reflections,
and limiting coverage to the direct illumination pat-
tern.
It’s helpful to think of the IR transmitter as an invisi-
ble floodlight. You want to aim it so listeners are
“flooded” with infrared light.
It’s desirable for the illumination patterns to overlap
when multiple transmitters are used. Placing the
transmitters high above the audience (15–30 ft.) and
aiming them slightly downward (5°–15°) will ensure
the longest “throw” of the infrared beam. Angling
the transmitter inward towards the center of the
room also increases the coverage of the seating area.
Remember that opaque objects block the infrared
light. Thus, transmitters cannot be concealed behind
an opaque walls, curtains, etc. Neither should trans-
mitters be used in areas of extreme high or low tem-
peratures, humidity, or chemical environments.
Coverage Area
The TX6 Transmitter is designed to distribute its
power equally among the channels sent to it for
transmission. Thus, when only a single channel is
present, the TX6 uses all its power to broadcast the
lone signal, achieving a coverage area of approxi-
mately 10,000 square feet. When two signals are
sent to the TX6 (as is the case when the MOD 112 is
in Stereo mode or in Discrete mode when both chan-
nels are in use), the TX6 divides its power equally
among the two signals. This makes for a coverage
area of about 5,000 square feet. This important prin-
ciple is illustrated in Figure 2.
If you’re not getting sufficient coverage with a sin-
gle, properly installed transmitter panel, you’ll need
to add additional TX6 Transmitters to achieve full
coverage of your listening area.
Figures 2 and 3 illustrate infrared light patterns and
recommended transmitter locations. In listening
areas up to 5,000 square feet, the TX6 Transmitter
panel should be installed on the front wall of the lis-
tening area in a position to flood the listening area.
It must be above the audience to permit a direct line
of sight between the transmitter and people wearing
receivers when the people are standing or sitting.
Listening areas of more than 5,000 square feet will
require two or more TX6 Transmitters for complete
coverage. Place one transmitter panel on the left side
of the front wall and the other on the right hand side.
The two transmitters will be connected with an
RG-58 cable. For extremely large venues, additional
TX6s should be located to maximize coverage
throughout the listening area.
Installation Step 2: TX6 Power Wiring
For U.S. Applications:
The TX6 Transmitter is supplied with a low-voltage
wall transformer power supply (TFP 010). Two-con-
ductor 18 ga. zipcord is included with the transmit-
ter.
For Applications Outside The U.S. Requiring
240 VAC Mains Supply:
See page 18.
WARNING! Shorting the power supply output
terminals will blow a non-replaceable internal
fuse, destroying power supply unit!
DO NOT CONNECT THE POWER SUPPLY TO
AC POWER YET!!!
Step 1:
Determine the length of zipcord needed to
reach from the transmitter to the AC wall
outlet where the power supply will be
plugged in. Zipcord length must not
exceed 200 feet.
One end of the zipcord has a 3-pin Molex
connector, the other end is bare. Cut the
bare end of the zipcord to length. Strip
this end down the middle approximately
1 inch, then strip both of the resulting
strands about 1/8 inch. Install the crimp-
on spade terminals supplied and connect
these to the screw terminals on the
TFP 010 Power Supply. Polarity is not
important since AC power is being used.
Step 2:
Plug the 3-pin connector into the TX6’s
Power In connector.
Step 4:
Plug in the TFP 010 Power Supply
The Power Indicator LED in the top cen-
ter of the front panel glows when the TX6
Williams Sound
®
Helping People Hear
6
