With the proper input level, the Audio indicator light will flash regularly,
in time with the program source. Optimum input signal level is
0.04
Volt
rms to 4 Volt rms. If you cannot achieve this input level with the
''
Input
Atten" switch, you will have to adjust the level at the program source.
If
you are using the
T4P
Transmitter with direct microphone inputs, set the
Input Attenuator Switch on the back panel of the
T4P
Transmitter to the
"-40
dB"
(right) position to reduce residual noise. The input attenuator
switch affects only the line level inputs. The "AUDIO" light should flash
when someone speaks into the Personal
PA
microphone.
Step
5.
Set the "Lo
Cut"
Switch
Start by setting the "Lo
Cut"
switch on the "1" (center) positioh. The "Lo
Cut'' switch affects both the microphone and line inputs. It can
be
used
to reduce hum from line level inputs
or
to improve speech intelligibility for
hearing impaired listeners. Most hearing impaired listeners lose sensitivi•
ty to high frequencies. Setting the Lo Cut switch in the "1" or
"2"
positioh
flattens the perceived system frequency response. The
"Lo
Cut"
switch
function is detailed
on
page 2.
Step 6.
Test
the System with a Receiver
Open a Receiver box and install the battery and earphone, folloWing the
receiver instructions. Stand near the antenna and turn the receiver on.
Listen for the broadcast, using the program source you connected earlier.
If you can't hear the broadcast, first try another Receiver
or
another bat-
tery.
If
you
have ordered rechargeable batteries, note that they are shipped
in a discharged state. They must be charged for
14-16
hours before their
initial
use.
If these suggestions don't work, consult the troubleshooting
section. ·
Step
7.
Check the System Range
Slowly walk away from the antenna while listening with the Receiver.
Walk throughout the seating area to check the range.
You
may find cer-
tain areas where the signal suddenly disappears. This is called a
"drop--
out"
and is a normal occurence within a building due to reflections and
cancellations
of
the radio signal. Moving slightly to the right or left will
restore the signal.
IF
THE
SYSTEM
IS
WORKING
CORRECTLY:
The orange "Audio" light
on
the front of the transmitter should flash regular-
ly with the input signal. The signal should
be
clear and undistorted in the
receivers. A slight amount of background hiss is normal. A hum
or
buzz-
ing sound indicates a problem. System range should be 300 to 500 feet
between the transmitting antenna and the receivers.
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