ASL INTERCOM PS 430 Manual del usuario - Página 4

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4.0

FRONT PANEL CONTROLS AND CONNECTOR

1 VOLUME control knob

This knob adjusts the listen level for the headset and

the loudspeaker.

2 TALK button

This push button activates the gooseneck or headset

microphone, the large green LED indicates if the

microphone is switched on.

Latched switching:

When a TALK button is pressed quickly, the

microphone will be switched on, and is electronically

latched. When pressed again, the microphone will be

switched off.

When the microphone is latched on, it can be muted by

a Mic Mute from a PRO Series master station or

separate power supply.

Momentary switching:

When a TALK button is pressed and held, the

microphone will be switched on, and when released,

will be switched off.

3 CALL button

This push button activates the call system.

A momentary push will send a call signal to all stations

connected to the intercom channel and the call LEDS

will start flashing.

Press and hold the button for 2 seconds will activate

the call buzzer, if not muted.

After the CALL button is released the LEDS will

continue to flash for further 2 seconds.

4 SIDETONE LEVEL trimmer

This trimmer controls the level of your own voice as

you hear it in the speaker or in the headset.

It prevents the speaker from feeding back into the

microphone.

5 SIDETONE HI trimmer

This trimmer controls the rejection in the high

frequency range. It compensates the capacity of the

interconnecting cables and prevents the speaker from

feeding back into the microphone (unit feedback).

Adjustment procedure for both sidetone trimmers :

set trimmer in start position : fully clockwise.

switch off the microphone of all connected (speaker

!) stations.

switch on the microphone of the PS 130.

turn up volume.

speak into the headset microphone.

adjust the listen level by turning the sidetone

trimmer.

The operating area is between fully clockwise and

minimum level. Adjusting the sidetone does not affect

the level of your voice as it is heard by other stations.

6 SPEAKER ATTENUATOR trimmer

This trimmer allows you to dim the speaker automati-

cally, when the gooseneck microphone is switched on.

It prevents :

unit feedback if sidetone rejection is not sufficient.

system feedback or a 'hollow' sound when the

microphone's of other speaker stations on the

same channel are activated simultaneously.

Adjustment procedure :

switch off TALK buttons.

inject an audio signal on the intercom channel.

turn up volume.

activate microphone and adjust the desired amount

of attenuation.

The speaker attenuator has no effect when a headset

is used.

7 BUZZER VOLUME trimmer

This trimmer adjusts the volume of the internal buzzer,

which is located behind the front panel.

The buzzer is activated if you press the CALL button of

the PS 130 or a CALL button of any other station (on

the channel to which the PS 130 is connected), longer

than 2 seconds and the buzzers are not muted (on the

master station or power supply).

8 GOOSENECK MICROPHONE

A high quality electret noise canceling microphone.

A limiter prevents the microphone preamplifier from

clipping when speaking close into the microphone.

9 HEADSET connector

An XLR-4 type connector for the connection of a local

headset when private conversation is desired. This

headset must have a can impedance of 200 ohms (or

greater), or each 400 ohms minimum when in parallel.

The microphone may be of the dynamic or electret

type.

Pin assignments :

1. Shield mic. (GND)

2. mic. +

3. phones +

4. phones -

When connecting a headset, the speaker and

gooseneck microphone will be disabled automatically.

10 LOUDSPEAKER

A high quality loudspeaker driven by a 1.3 Watt

amplifier.

Speaker and gooseneck microphone automatically

shut off when a headset is used.