SoundPlus
™
Infrared Listening System
Quick Setup Guide
Two-Channel Configuration, WIR TX925, WIR SYS 1, WIR SYS 4
CHA
AUDIO IN
CHB
AUDIO IN
AUDIO
OUTPUT
POWER ON
INDICATOR
MOD 232 MODULATOR (REAR)
BASEBAND
OUTPUT
BASEBAND
OUTPUT
BASEBAND
INPUT
BASEBAND
INDICATOR
TO ADDITIONAL EMITTERS
(IF NECESSARY)
WIR TX9 EMITTER (REAR)
RX22-4 RECEIVERS
(WIRELESS)
A264
Power On
Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VAC
NC
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
w w w. w i l l i a m s s o u n d . c o m
In
Out
Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound, Minneapolis, Minnesota, USA
Patent Pending
POWER IN
120 AVC (US): TFP 010
230 VAC (CE): TFP 027
POWER IN
120 AVC (US): TFP 010
230 VAC (CE): TFP 027
Figure 1: Typical 2-channel configuration when
using the MOD 232 Modulator, TX9 Emitter, and
optional RX22-4 Receiver.
Refer to installation manual for detailed descriptions and set-up procedures.
Modulator Set-Up
1. Position the MOD 232 Modulator near the sound system or mixer from which it will receive audio.
2. Connect the power supply to the 3-pin Molex connector located in the back of the MOD 232. A green LED will
illuminate on the front of the MOD 232 when the power switch is in the “On” position.
3. Audio connection: The MOD 232 Modulator will accept a microphone using 3-pin male connector, or a 1/4” phone
plug with a balanced or unbalanced line level signal. Connect the sound system accordingly to the audio inputs in the
back of the MOD 232 labeled “Input CHA” and “Input CHB.”
4. The MOD 232 Modulator has four selectable frequencies to choose from: 2.3, 2.8, 3.3, 3.8 MHz. This system is
preset to 2.3 and 2.8 MHz. Frequency selection can be adjusted by using the “Configuration Switches” located on the
back of the MOD 232.
5. Prepare the MOD 232 to be connected to the TX9 emitter. Determine the length of RG-58 cable needed to reach from
the emitter to the Modulator unit. Install BNC connectors to each end of the cable.
MAN 133D
