Williams Sound MOD 112 Guia de Instalação descarregar pdf (Página 12)

Williams Sound

Helping People Hear

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allowing another 30 minutes before the carrier can

again go off.

After the carrier has automatically gone off, audio

sufficient to light the -21 level indicator light will

turn the carrier back on immediately.

Audio Processor Switch

Selects one of the two modes available.

Limit Mode

The audio processor has little effect on low level

sound.

As the level increases, reaching the level to

light the red +6 light on the level indicator, no fur-

ther increase in transmitted level is permitted. This

is necessary to prevent distortion in receivers and

prevent interference with other channels. Limit pro-

duces a very natural sound, and is most desirable for

music. High quality speech is very pleasant to listen

to. However, Limit is not as helpful for hearing

impaired individuals as Compress mode.

Compress Mode

At high levels, 0 to +6, Compress is very similar to

Limit. But at low levels Compress increases the

volume substantially. Hearing impaired people need

an increase in low level to be able to hear most

speech.

Compress is most useful for hearing impaired indi-

viduals and where the input signal is poorly con-

trolled or has great dynamic range.

Mode Switch

The Mode Switch selects how the channels are used.

Separate processing for each channel is provided in

Discrete mode, where the two channels have unrelat-

ed program material such as two dif

ferent languages.

Coupled processing is provided for Stereo mode,

where the program material is related.

Discrete Mode

The channels operate fully independently. Carrier

timers operate separately

, allowing one channel to

go off without affecting the other. The Phones jack

receives one or the other channel, as selected by the

Phones switch. Both channels of the Phones jack

have the same signal.

Stereo Mode

Audio processing is coupled, providing a consistent

stereo image, important when listening with head-

phones. Carrier timers are coupled, requiring both

to have reached approximately 30 minutes before

either carrier can go off. Both carriers go off and on

together. The Phones jack receives stereo sound,

one channel in the left side and the other channel in

the right side. The Phones switch is deactivated.

Phones

The phones jack monitors the audio in one, the other

or both channels, depending on the setting of the

Mode and Phones switches. It is designed to accom-

modate standard professional headphones with a

1/4 inch Tip-Ring-Sleeve (Stereo) plug. Channel 1 is

on the Tip, channel 2 is on the ring and the sleeve is

common. It can also accept any other type of head-

phone or earphone. Monophonic headphones are

acceptable, however will not provide stereo repro-

duction. Headphones with 3.5 mm plugs can be

used with a 1/4 inch to 3.5 mm adapter. If 3.5 mm

stereo phones are used, a stereo adapter is required.

IR LED

Infrared receivers can be tested using the IR LED.

It is of short range only, useful only to about

1 meter

. Infrared emitted from this LED is modulat-

ed by the carriers generated in this unit only. If this

modulator is connected to other modulators for addi

tional channels, their carriers are not emitted by the

LED, and must be monitored at those modulators.

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