ASL INTERCOM PS 430 Manual do Utilizador descarregar pdf (Página 4)

4.0 FRONT PANEL CONTROLS & CONNECTOR

1 LISTEN LEVEL control knobs 6 SIDETONE HI trimmers

These knobs preset the listen level for each channel These trimmers (one for each channel) control the

separately. rejection in the high frequency range. It compensates

2 TALK buttons

These buttons allow you to talk to each channel microphone (unit feedback).

separately or simultaneously.

Any Talk button activates the gooseneck or headset

microphone, the large green LED at each channel This trimmer allows you to dim the speaker automati-

indicates if the microphone is switched on to that cally, when the gooseneck microphone is switched on.

channel. It prevents:

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 - switch off TALK buttons.

a mic mute from a PRO Series master station or power - inject an audio signal on the selected intercom

supply. channel.

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 buttons

These push buttons activate the call system, for each

channel separately.

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 MASTER VOLUME

This knob adjusts the volume of the speaker or

headset.

5 SIDETONE LEVEL trimmers

These trimmers (one for each channel) control the level

of your own voice as you hear it in the speaker or

headset. It prevents the speaker from feeding back into

the gooseneck microphone.

Adjustment procedure for all 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 430.

- turn up volume.

- speak into the headset microphone.

- adjust the listen level by turning the sidetone

trimmers.

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.

the capacity of the interconnecting cables. It prevents

the speaker from feeding back into the gooseneck

7 SPEAKER ATTENUATOR trimmer

- unit feedback if sidetone rejection is not sufficient.

- system feedback or a 'hollow' sound when the

gooseneck microphones of other speaker stations

on the same channel are activated simultaneously.

Adjustment procedure :

- turn up volume.

- activate microphone and adjust the desired amount

of attenuation.

The speaker attenuator has no effect when a headset

is used.

8 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 430 or

a CALL button of any other station (on the channel to

which the PS 430 is connected), longer than 2 seconds

and the buzzers are not muted (on the master station

or power supply).

9 HEADSET connector

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

headset when private conversation is desired. These

must have a can impedance of 200 ohms (or greater),

or each minimum 400 ohmd when in parallel.

The headset 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, speaker and gooseneck

microphone will be disabled automatically.

The PS 430 can optionally be equiped with a XLR-6

headset connector for binaural use.

Jumpers on the front PCB board inside determine the

destination of the listen signals on the headset.

Each listen signal of the four channels can

independantly be placed:

- on the left or right can.

- on both cans.

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ASL INTERCOM PS 430 Manual do Utilizador Página 4

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