Distribution Amplifier

2.5.2

Distribution amplification shall be provided as required to deliver the

minimum signal parameters specified in paragraph SYSTEM DESCRIPTION and

TABLES IIa and IIb to user interfaces. Distribution amplifier shall be

designed for heavy duty commercial and industrial applications. As a

minimum, amplifier shall be contained in a wall-mountable steel or aluminum

housing, vented or finned for convection cooling. Amplifier cable ports

shall be "F" type. External RF test points shall be provided to monitor

signals without opening the housing. Amplifier may be powered through the

cable or by a 120 Vac, 60 Hz source. Surge protection module shall be

provided on outside cable entry ports. Cable powered amplifier shall be

capable of passing a maximum of 10 amperes through cable ports without

damage. The individual components, amplifiers, filters, splitters, pads,

equalizers and automatic level control circuitry shall be modular in

construction and shall plug into the main RF chassis.

2.5.3

Signal Distribution System Power Supply

The signal distribution system power supply required for cable powered

amplifiers shall be 100 percent plug-in modular construction and shall

include lightning surge, short circuit, and overload protection. Circuitry

shall be fully protected by circuit breakers. Power supply shall be

standby type with sealed batteries supplied. Power supply shall be housed

in a fully weatherproofed steel cabinet, and shall as a minimum conform to

the following specifications:

Input Voltage:

95-130 Vac, 60 Hz

Output Voltage:

30 or 60 Vac as required by amplifier

Output Current:

12 amperes @ 30 or 60 Vac

Line Regulation:

Plus or minus 2 percent, 95 - 130 Vac

Local Regulation:

Plus or minus 2 percent, 1/3 of full load

Noise Level:

Less than 48 dB at 300 mm 1 foot distance

PART 3

EXECUTION

3.1

INSTALLATION

Interior installations shall comply with NFPA 70. Exterior installations

shall comply with IEEE C2, NFPA 70, and NFPA 780. System components shall

be installed and tested in accordance with the manufacturer's

specifications and recommendations.

3.1.1

Head End Equipment

The components comprising the head end equipment shall be

located as shown.

Grounding of the system shall comply with NFPA 70. Rack

mounted head end

equipment shall be mounted at least 900 mm 36 inches from

any wall. Head

end equipment shall be aligned to meet system performance

and

manufacturer's requirements.

3.1.2

Distribution System

The Contractor shall configure the distribution system components in a

SECTION 16785A

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