Installation & Operation Manual

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Room Coverage

Establishing the number of microphones used in a system should not be determined by the size of the room but by the coverage area. This is the area where people will be located while participating in the conference. CTG microphones typically cover an area with a radius of 5 to 10 feet from the microphone location.

Typical Configurations – drawings show microphone and speaker locations

U-shaped tables

30’x30’ coverage area

Centered conference table

25’x15’ coverage area

Large u-shaped tables

40’x30’ coverage area

Centered conference table with perimeter seating

45’x30’ coverage area

Training room with movable furniture

50’x30’ coverage area

Ceiling Speaker

Table Microphone

Ceiling Microphone


Coverage area

Installation of CTG Microphones and Speakers
Tools Required for Installation
The following tools are recommended for the installation of the ceiling components and setup:

  • ½ inch drill – for drilling through an acoustic tile, a perfect hole will be made for the CM-01 ceiling microphone

  • Hand saw – the ceiling speaker enclosure requires a 6 3/8-inch hole

  • Wall snake – in most rooms, cables will need to run down through a wall and terminate at the FS-03

  • Wire nutsfor ceiling speakers

  • Wire Stripper

  • Small blade screw driver – often referred to in the industry as a “tweaker”

  • Ladder

  • CTG Preset Switch (optional) – This switch (WP-02 available though CTG) connects to the Logic Input connector on the rear panel of the FS-03. The switch selects between two stored configurations. A momentary manual closure to ground (Pin 9) may also be used to switch among presets

General-CTG Microphones
CTG microphones are true 360° Omni directional. They are electret condenser boundary microphones. The microphone itself should be flush mounted in a boundary of at least 12” in diameter. The element in the tabletop microphone (TM-01) is mounted in a base designed to acoustically couple to the table surface and provide an adequate boundary.

* Each microphone must connect directly to the FS-03 with a “homerun” connection.

Recommended Microphone Cable

  • 22 gauge single pair shielded (plenum rated) Belden® type 82761 or equivalent


  • Phantom voltage supplied to CTG microphones should be 2-20 Volts DC. Exceeding 20 Volts will damage the element. The FS-03 microphone channel inputs provide 12 volts DC

  • To avoid crosstalk, it is preferred microphone and speaker cable NOT be bundled or run together in the same conduit over long distances

Wiring for Microphones (CM-01, TM-01, TM-02)
A connection module (MCM-101) is supplied with each microphone.

On the MCM-101 is a four position Phoenix Terminal Block.

Phoenix Terminal Block

Connection Module

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