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
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 nuts – for 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
CAUTION:
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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