95 Khz Carrier Cable Connection; Audio Source Connection; Using A Microphone; Hi-Pass Filter Setting - Williams Sound SoundPlus WIR TX300 Installation Manual & User Manual

Step 4: MOD 1 Modulator
Installation
Location:
The Modulator is usually located near the sound
system amplifier or mixer for easy access to an audio
input signal. For portable systems, the modulator can
be placed near the transmitter or wherever is most
convenient.
Power Connection
Step 1: Connect the power supply wires to the two
center screw terminals on the terminal
block located on the rear of the Modulator.
Step 2: Plug the power supply into an AC outlet.
95 kHz Cable Connection
Connect the coaxial cable to either F-type
"Modulator Out" jack on the MOD 1. For systems
having multiple transmitters, both modulator outputs
can be used to run a separate coax cable to
transmitters on each side of a stage, screen, etc. The
MOD 1 drives one transmitter per modulator output.
The transmitters then repeat the 95 kHz signal, so
any number of transmitters can be used. The
modulator outputs CANNOT be split with CATV
splitters.
Audio Connection
Mono, Unbalanced Source:
Use the RCA to RCA audio cable supplied to
connect either MOD 1 unbalanced "Audio Input"
jack to an appropriate unbalanced, line-level audio
output jack on the sound system mixer or amplifier.
Suitable connections are:
1st Choice: TAPE OUT or LINE OUT Jack
2nd Choice: BOOSTER or BRIDGING Jack
If your amplifier or mixer does not have RCA-type
connectors, you can obtain adaptors from your
Williams Sound Authorized Dealer or a local radio
parts store. If the TAPE OUT jack is already in use,
a Y-Cord can be used to connect the MOD 1 and a
second device to the same jack.
Williams Sound
Helping People Hear
®
Stereo, Unbalanced Source:
For stereo sources, use an additional RCA to RCA
cable and connect the left and right signals to the two
inputs on the MOD 1. They will be mixed into a
mono signal for transmission.
Three–Channel, Unbalanced Source
(Left, Right, Center Channel):
Set the input level switch to "Line." Use the two
unbalanced inputs and the XLR balanced input. You
will have to make an RCA to XLR adaptor cable. To
unbalance the XLR input, wire XLR pin 2 to the
positive audio pin on the RCA plug and wire XLR
pin 1 and pin 3 together to the audio ground sleeve
on the RCA plug. The three signals will be mixed
into a mono signal for transmission.
Balanced, Line–Level Source:
Set the Input Level Switch to "Line." The XLR input
jack can be connected to any balanced, line-level
audio signal. It has an input impedance of
100 KOhms, so it will not load the signal.
Balanced, Microphone Source:
Set the Input Level switch to "Mic." Any low-
impedance, balanced microphone can be plugged
into the XLR input jack. Simplex power is supplied
for condenser microphones.
4 or 8 Ohm Speaker Line Source:
Set the Input Level Switch to "Line." Wire an
adaptor cable with the positive speaker line
connected to XLR pin 2. Connect the negative or
ground speaker line to XLR pin 3.
25 or 70V Speaker Line Source:
Set the Input Level Switch to "70V." Wire an adaptor
cable with the positive speaker line connected to
XLR pin 2. Connect the negative or ground speaker
line to XLR pin 3.

Hi-Pass Filter Setting

The normal setting is the center (175Hz) position.
For language interpretation or visual description, the
20Hz setting can be used. For hearing assistance, the
725Hz setting can be used to compensate for typical
high-frequency hearing loss. Ask the users what
sounds best to them.
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