PRO SERIES
USER MANUAL
FOR THE
PS 230
DUAL CHANNEL SPEAKER STATION
CONTENTS
1.0 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . 1 2.0 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4.0 FRONT PANEL CONTROLS AND CONNECTOR . . . . 2 5.0 SIDE PANEL CONNECTORS . . . . . . . . . . . . . . . . . . . . 3 6.0 INTERNAL CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . 4 7.0 CABLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8.0 PARTY LINE, TECHNICAL CONCEPT . . . . . . . . . . . . . 5 9.0 GUARANTEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10.0 TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . 5
User Manual PS 230 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
1.0GENERAL DESCRIPTION
The PS 230 is a dual channel speaker station designed for use in both portable and fixed intercom systems.
It incorporates a loudspeaker and a gooseneck microphone and provides full duplex communications within an ASL intercom system. The PS 230 RM model has a small built-in electret microphone.
Each channel has a Volume (listen level) control, a Talk and Call button with LED indicators and a two-stage sidetone trimmer.
The unit is equiped with a limiter for the gooseneck microphone, allowing the user to speak close into the microphone without giving rise to overload and distortion. Loudspeaker dimming is automatic when the microphone is active. Private conversation may be carried out via the headset connector with a headset or telephone handset. When a headset is connected, both the gooseneck microphone and speaker are disabled automatically.
As an option, a XLR-6 headset connector can be fitted allowing the user to hear channel A at the left headset can and channel B at the right headset can.
Special attention has been paid to the intelligibility of speech. By applying low noise/high speed opamps, a speech presence filter and a specially developed high power bridged headphone amplifier, communication is very comfortable even in environments with high back- ground-noise level. There is a separate amplifier for the loudspeaker.
The unique ASL CALL system provides both a flashing red LED and a very distinctive and characteristic sound signal. Smooth operation is guaranteed with the CALL button.
Only a slight touch makes the red LED flash, whilst holding the button for two seconds will activate the CALL sound signal. The volume of the sound signal (buzzer) can be adjusted at the front panel.
Fully electronic switching increases reliability and allows for :
-'soft' microphone ON switching, latched or momentary
-remote Mic Mute facility.
-automatic speaker attenuation (adjustable), when the microphone is activated.
2.0UNPACKING
The shipping carton contains the parts below:
*The PS 230
*User manual
If any are missing, contact your dealer.
ASL has taken great care to ensure this product reaches you in flawless condition.
After unpacking the unit please inspect for any physical damage to the unit, and retain the shipping carton and relevant packing materials for use should the unit need returning.
If any damage has occured, please notify your dealer immediately so that a written claim can be initiated. Please also refer to the guarantee section of this manual.
3.0INSTALLATION
This PS 230 will form part of an existing or new intercom system, and connection to it is straightforward. There are no separate power connections, or batteries to install, as the necessary DC voltages are derived from the intercom master station or power supply, via the intercom connection cable.
To connect the PS 230 to the intercom system, use professional flexible microphone cable with 2 wires and 1 screen only. Connect the system intercom cable to the LINE connector socket on the side panel. Finally, when private conversation is desired, connect the listening headset plug to the HEADSET connector on the front panel.
The PS 230 is fully protected against mis wiring (reverse power) or short circuit in the interconnect cables.
A special kit is available for mounting the PS 230 in a 19" rack, taking 2U of rack space.
User Manual PS 230 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland. |
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4.0FRONT PANEL CONTROLS & CONNECTOR
1VOLUME control knobs
These knobs adjust the listen level for speaker and headset. The level of each channel can be adjusted separately.
2TALK buttons
These buttons allow you to talk to each channel separately or simultaneously.
Any Talk button activates the gooseneck or headset microphone, the large green LED at each channel indicates if the microphone is switched on to that channel.
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 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.
3CALL 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.
4SIDETONE 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 microphones of all connected (speaker !) stations.
-switch on the microphone of the PS 230.
-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.
5SIDETONE HI trimmers
These trimmers (one for each channel) control the rejection in the high frequency range. It compensates the capacity of the interconnecting cables. It prevents the speaker from feeding back into the microphone (unit feedback).
6SPEAKER ATTENUATOR trimmer
This trimmer allows you to dim the speaker automatically, 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 microphones of other speaker stations on the same channel are activated simultaneously.
Adjustment procedure :
-switch off TALK buttons.
-inject an audio signal on the selected 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.
7BUZZER 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 230 or a CALL button of any other station (on the channel to which the PS 230 is connected), longer than 2 seconds and the buzzers are not muted (at the master station or power supply).
8HEADSET connector
A XLR-4 type connector for the connection of a local headset when private conversation is desired. This must have a can impedance of 200 ohms (or greater), or each 400 Ohms minium 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, the speaker and gooseneck microphone will be disabled automatically.
The PS 230 can optionally be equipped with a XLR-6 headset connector for binaural use.
Channel A will then appear on the left can and channel B on the right can.
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User Manual PS 230 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland. |
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