Williams Sound MOD 112 Guía de instalación descargar pdf (Pagina 10)

Williams Sound

Helping People Hear



Step 3: Look at the transmitter panel(s). With the

modulation signal and power connected,

two red lights should be visible on the the

panel–the power indicator at the center top

and the baseband indicator located at the

center bottom.

Step 4: Hold a receiver near the “Infrared Test

Out” LED on the front of the MOD 112.

Turn the receiver on and adjust the vol-

ume. You should be able to hear the audio

signal through the receiver. If not, make

sure the CXR On Indicator is lit and there

is activity on the Level Indicators. If the

lights are not flashing, check your audio

source or the setting of the input level

switch and input level control. If the audio

lights are flashing, but you don’t hear any-

thing from the receiver, try a different

receiver to be sure the receiver is working.

Step 5:

Take a receiver into the listening area and

walk around to check the reception. Make

sure the “eye” on the receiver is not cov-

ered up when in use. The receiver will not

work if it is placed in a pocket or purse

and its eye must be able to “see” the trans-

mitter panel. It may be necessary to adjust

the angle of the transmitter(s) to obtain the

best coverage. If coverage is not adequate,

additional transmitter panels must be used.

25 V, 70 V, and 100 V speaker lines can be connect-

ed to the balanced line inputs using an appropriate

attenuator. “T” pads made with resistors yield better

fidelity than speaker matching transformers.

The MOD 112 transmits audio with excellent fideli-

ty. Therefore, be sure to connect its inputs to signal

sources that supply audio that is the best your sys-

tem can offer. The signal should not be processed by

an equalizer used for an accompanying PA system.

The MOD 112 has excellent signal processing, so

the use of additional limiters or compressors is not

recommended.

Installation Step 5: Testing the System

Step 1:

After the baseband cable, power cables,

and audio source are connected, turn the

MOD 112 power switch on. The green

power LED on the front of the MOD 112

should light.

Step 2: Make sure the sound system is on and

your audio source is active. Check the

quality of your audio source signal by lis-

tening through the Phones jack on the

MOD 112’s front. The MOD 112’s

10-segment bar graph level indicator

shows audio level in 3 dB steps at input of

audio level processing circuit.

Model WIR MOD112 Two-Channel Infrared System Modulator

Accessory

Power: 24 VAC, 

50-60 Hz, 10VA

Williams Sound Corp., Minneapolis, MN USA

Balanced 

Mic (XLR)

Bal or Unbal 

Line (1/4")

Ch 1 Audio Input Ch 2 Audio Input

Baseband 

Output

Baseband 

Input

50 Ohms 50 Ohms

Baseband Output Connection

Connect to TX6 here using 

RG-58 cable and BNC connector.

Power Connection

Plug in TFP 016 

Power Supply

Figure 7: Modulator Wiring Detail

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

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Williams Sound MOD 112 Guía de instalación Pagina 10

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