Williams Sound MOD 112 Instalační příručka stáhnout pdf (Strana 11)

Williams Sound

Helping People Hear



Channel 1 and 2 each have individual Level

Controls, Level Indicators and Carrier On Indicators.

They function independently and identically for each

channel.

Level Indicator

Bar graph level indicator shows audio level in

3 dB steps at input of audio level processing circuit.

Indicator is peak responding and is calibrated so that

optimum level is reached when the amber +3 light

usually blinks and the red +6 light only blinks occa-

sionally.

CXR On Indicator

The Carrier On indicator shows when the associated

carrier is on. Carriers come on when power is

applied, but go off automatically if there is no audio

for approximately 30 minutes. Audio sufficient to

light the –21 level indicator light will reset the timer

Controls and Features

MOD 112 Front Panel

Power Switch

Turns the entire system on and off. The associated

wall mounted power supply stays on at all times and

may operate continuously. There is no “wear out”

mechanism.

Power On Indicator

Indicates actual operation of modulator

. Does not

indicate status of power supply.

Level Control

Controls level of audio signal for the associated

channel. Control is connected between the input

amplifier and the audio level processing circuit.

Phones

Infrared

Test Out

MOD 112 Two-Channel Infrared System Modulator

Williams Sound

Power

CXR

Limit

Compress

Discrete

Stereo

Audio Mode Phones

CH1

CH2

CXR

-21 -18 -15 -12 -9 -6 -3 0 +3 +6-21 -18 -15 -12 -9 -6 -3 0 +3 +6

CH 1 Level CH 2 Level

Channel 1 Channel 2

Figure 8: MOD 112 Front Panel

Power Switch

Turns the entire system on and off.

The associated wall mounted power

supply stays on at all times.

Power On Indicator

Indicates actual operation of

unit. Does not indicate status of

power supply.

Level Control (Ch 1)

Controls level of audio signal

for channel 1.

Level Indicator (Ch 1)

Bar graph level indicator shows audio

level in 3 dB steps at input of audio

level processing circuit.

CXR On Indicator (Ch 1)

The Carrier On indicator shows

when the channel 1 carrier is on.

Audio Pr

ocessor Switch

Selects one of the two modes

available: Limit and Compress

Mode Switch

Selects how the channels are used.

Separate processing for each channel is

provided in the Discrete mode, coupled

processing is provided for Stereo Mode.

Phones Jack & Switch

The phones jack monitors the

audio in one, the other or both

channels, depending on the set-

ting of the Mode and Phones

switches.

IR LED

Infrared receivers can be

tested using the IR LED.

Level Indicator (Ch 2)

Bar graph level indicator shows

audio level in 3 dB steps at input

of audio level processing circuit.

Level Control (Ch 2)

Controls level of audio signal

for channel 2.

CXR On Indicator (Ch 2)

The Carrier On indicator shows when

the channel 2 carrier is on.

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