CS 1

Conference System

Description

The AKG Model CS 1 is an extremely flexible and sophisticated gating-type conference system for accommodating large numbers of participants. Its various modes of operation provide for flexibility and discussion continuity during the most complex formal and political meetings.

A single CS BU 1 base unit will handle 100 user microphone units in four series-wired groups of 25 units each. One or more Model CS EU 1 extension units may be used, each providing an additional capability of 100 user microphone units. The base unit offers the following control functions:

1.Input level controls: active microphones, line, and auxiliary. The line input can accommodate additional signal inputs, such as wireless microphones; the auxiliary input accommodates an external stereo audio source.

2.NOM (number of microphones) setting; determines the maximum number of microphones that may be open at one time; useful in maintaining orderly discussions. Up to five simultaneous microphones inputs may be on at a given time.

3.Loudspeaker level control. Sets level of output signal which is fed back to the nearfield loudspeakers located in each individual user station.

4.Line output control. Sets level sent to local sound reinforcement facilities.

5.Recording output. Determines the level of the stereo output signal intended for recording program proceedings.

The CS DU “delegate” user station provides management via self-contained DIP-switches over the following functions:

1.Microphone sensitivity adjustment (high or low)

2.Automatic muting after long pauses (on or off)

3.Muting time setting (long or short)

4.NOM, on or off (allows distinguished participants to speak, even when NOM limit has been reached)

5.Voice/pushbutton activation (allows distinguished participants to speak without using pushbutton); when a user station is activated, its internal loudspeaker is muted in order to avoid feedback.

The CS CU “chairman” user station is designated for chairman and sub-chairmen use and has an additional priority control that will mute all lower priority stations when engaged. Through the use of dual-level priority action, both chairman and sub-chairmen levels of control may be accommodated. This is considered a valuable feature in political discussions, where there may be multiple levels of authority on the discussion floor.

On all user stations a bright red LED ring just below the microphone capsule lights up when that microphone is actuated.

Figure 1 shows a typical setup using a single base unit, and Figure 2 shows as typical setup using a single base unit plus an expansion unit.

 

 

 

 

 

 

 

 

3

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VOICE

 

 

 

 

 

 

 

 

 

 

 

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ACTIVATED

 

 

 

 

 

 

 

POWER

 

 

LIMIT

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ON

 

 

 

 

 

 

 

 

 

 

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AUX.

AUDIO

 

 

CONTROL

 

 

 

 

 

 

 

POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DELEGATE MICROPHONES

LINE OUT

 

 

OUT / REC

 

AUX

LINE

OV OV OV

 

LINE 1

LINE 2

LINE 3

LINE4

INT.

bal.

 

 

FINE

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IN

 

 

SPEAKER

 

 

 

ADJUST

 

 

 

bal.

 

 

 

 

 

 

 

 

 

 

 

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R

 

 

AC POWER INPUT

Made in Germany

 

 

 

 

 

 

 

 

 

 

 

 

50/60Hz 250VA

 

 

 

 

 

 

 

 

 

 

 

 

Features

 

 

 

 

 

 

 

 

 

 

 

 

Multiple levels of priority gating

Simplified series-wiring for easy setup and minimum clutter

Near-field loudspeaker included in all user modules

Base control unit provides for 100 microphone inputs; expansion units each provide 100 additional inputs

Uses AKG’s small format high performance CK-series microphone capsules mounted on short double gooseneck extensions

Base control unit inputs: additional (wireless) microphones and stereo program source

Base control unit outputs: stereo recording and public address feeds

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AKG Acoustics CS1 manual Conference System Description, Features