Williams Sound
®
Helping People Hear
12
A
VOIDING
U
NDESIRABLE
A
NTENNA
I
NSTALLATIONS
Transmission (range, directional properties) can be severely impaired by improper
installation of the antenna.
þ
DO NOT install the antenna within any metal enclosure.
þ
DO NOT install the antenna where it is within about 4 feet of any metal object that is
more than about 2 feet long.
þ
DO NOT install the antenna where it is separated from the listening area by any
substantial metal object, such as heating ducts, structural steel, foil backed insulation,
steel studs or metal lath.
þ
DO NOT install the antenna with its elements horizontal. It is a technical advantage to
use vertical polarization as well as an FCC requirement.
S
TEP
3:
C
HOOSE A
C
HANNEL
Normally, the T4’s factory-set channel (72.9 MHz) requires no change. However, it may
prove necessary to use an alternate channel if another hearing assistance system or authorized
radio service is operating on 72.9 MHz in your area.
In this case, you may easily set the T4 Transmitter to any of the 10 available channels using
the FM Channel/Power Switch. Remember, receivers must also be set to the same frequency.
See page 20 for receiver tuning instructions.
IMPORTANT: Some cities have other radio services licensed on hearing assistance
channels, and under FCC rules governing hearing assistance, you must yield
to them. A list is included with the transmitter of cities where other radio
services are known to exist. Do not use frequencies that are known to be
used by licensed radio services in your city, either if they are on the list or if
you discover one.
NOTE:
If you seem to be having interference problems, the best course of action is
to first work through the Trouble Shooting Guide—in case the problem is
not
caused by interference. Try retuning if the problem remains.
RCA to 1/4" Adapter
RCA to RCA Cable
To T4 Audio Input
From Sound System
Amplifier's Line Output
F
IGURE
5: U
SING
T
HE
A
UDIO
C
ABLE
S
UPPLIED
F
OR
U
NBALANCED
C
ONNECTIONS
