SECTION 16781

TELEVISION DISTRIBUTION SYSTEM

PART 1 GENERAL

SECTION INCLUDES

Television antenna.

Television distribution equipment.

Cable and accessories.

RELATED SECTIONS

Section 16111 - Conduit.

Section 16120 - Wire and Cable.

Section 16130 - Boxes.

Section 16450 - Secondary Grounding.

Section 16670 - Lightning Protection Systems.

SYSTEM DESCRIPTION

Provide [broadband] [channelized] type [community antenna television] [master antenna television] [cable television] system.

PERFORMANCE REQUIREMENTS

Television Channels [2] [3] [4] [5] [6] [7] [8] [9] [___] [and FM radio].

Signal at Each Outlet: [3] [___] dBmV across 75 ohms, minimum, plus [5] [___] dB, minus 0 dB.

SUBMITTALS

Submit under provisions of Section [01300.] [01340.]

Shop Drawings: Indicate installation details, cable routing, and system configuration.

Product Data: Submit for each component.

Submit manufacturer's installation instructions.

PROJECT RECORD DOCUMENTS

Submit record documents under provisions of Section [01700.] [01720.]

Accurately record actual locations of outlets, devices, and cable routing.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700.] [01730.]

Operation Data: Include instructions for setting and tuning channels.

Maintenance Data: Include basic trouble-shooting procedures.

QUALIFICATIONS

Supplier: Company specializing in supplying the products specified in this Section with minimum [three] [_____] years [documented] experience, and authorized by product manufacturer.

REGULATORY REQUIREMENTS

Conform to requirements of cable Utility.

MAINTENANCE SERVICE

Furnish service and maintenance of products for [one] [_____] year from Date of Substantial Completion.

PART 2 PRODUCTS

MANUFACTURERS - VHF ANTENNA

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

VHF ANTENNA

Provide broadband UHF/VHF antenna for television channels required[.] [as manufactured by [________________________.]]

****** [OR] ******

Provide one single channel antenna for each channel required[.] [as manufactured by [________________________.]]

Impedance: 75 ohm, gamma match.

Antenna Type: [5] [10] [___] element Yagi type.

Gain: [13] [___] dB over tuned dipole.

Front-to-Back Ratio: [20] [___] dB, minimum.

Beam Width: [52 degrees vertical x 63 degrees horizontal] [38 degrees vertical x 48 degrees horizontal] [____________________], minus 3 dB.

Return Loss: [17] [___] dB, minimum over entire channel.

Construction: Use tubular metal elements.

Mounting Hardware: Suitable for stacking; minimum separation, 1/2 wavelength.

Wind Resistance: Withstand [100] [_____] mph ([160] [_____] km/hr wind.

MANUFACTURERS - VHF PREAMPLIFIER

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

VHF PREAMPLIFIER

Provide broadband preamplifier for channels required[.] [as manufactured by [________________________.]]

****** [OR] ******

Provide one single channel preamplifier for each required channel[.] [as manufactured by [___________________.]]

Impedance: 75 ohm.

Bandpass: 6 MHz, plus or minus 0.25 dB.

Gain: [24] [___] dB, minimum.

Signal-to-Noise Ratio: [3] [___] dB maximum.

Power Supply: Remote, impedance matched for [22] [_____] dB return loss, [0.2] [_____] dB through loss. Provide 120 volt, single phase input.

MANUFACTURERS - CONVERTER

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

CONVERTER

Provide solid-state, crystal-controlled converter for [converting UHF channel [___] to VHF channel [___]][.] [each UHF channel required, set to convert to VHF channel scheduled][.] [as manufactured by [_______________.]]

Gain: [10] [___] dB.

Minimum Input Signal: [Minus 1.0] [___] dBmV.

Maximum Signal Without Distortion: [35] [___] dBmV.

Signal-to-Noise Ratio: [8] [___] dB, minimum.

Bandpass Flatness: [0.5] [___] dB over channel.

Power Supply: 120 volt, single phase input.

MANUFACTURERS - VHF AMPLIFIER

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

VHF AMPLIFIER

Provide one single channel VHF amplifier with automatic gain control for each required channel, including converted UHF channels[.] [as manufactured by [____________________.]]

Impedance: 75 ohm.

Input Match: [11] [___] dB return loss.

Output Match: [13] [___] dB return loss.

Bandpass Flatness at Full Gain: Plus or minus [1.5] [___] dB.

Gain: Adjustable, [35 to 55] [__________] dB.

Output: [69.5] [_____] dBmV, maximum, for 0.5 dB synch compression.

Noise at Maximum Gain: [7] [___] dB maximum.

AGC Range: [40] [___] dB, minimum.

Power Supply: Provide 120 volt, single phase input.

ACCESSORIES

Bandpass Filter: Provide one bandpass filter for [each required channel which is adjacent to another required channel.] [channels [___] and [___.]]

Impedance: 75 ohm.

Insertion Loss: [3.5] [___] dB, maximum.

Bandpass Flatness: 1.5 dB.

Selectivity: [Minus 55] [_______] dB at 9MHz.

Manufacturer and Model: [_________________________.]

Trap:

Provide [one] [_____] tunable trap.

Range: 14.5 to 216 MHz.

Bandwidth: 1.9 MHz., Plus or minus 3 dB.

Maximum Notch Depth: 60 dB.

Manufacturer and Model: [_________________________.]

Attenuator Pads:

Impedance: 75 ohm.

Bandwidth: 6 MHz., Plus or minus 0.5 dB.

Manufacturer and Model: [_________________________.]

Tap: [Surface mounted,] [Recessed, suitable for mounting with standard duplex receptacle wall plate,] all channel, back-matched tap.

Through Loss: [0.7] [_____] dB, maximum.

Return Loss: [20] [_____] dB, maximum.

Isolation: [[12] [23] [_____] dB] [As scheduled.] [As required at each tap to meet specified performance.]

Connector: [F] [Pin] type coaxial connector.

Manufacturer and Model: [_________________________.]

Splitter: Inline, all channel, back-matched splitter.

Through Loss: [3.5] [_____] dB for two-way; [6.7] [_____] dB for four-way.

Isolation: [16] [_____] dB, minimum.

Manufacturer and Model: [_________________________.]

Cable:

Antenna Cable: [RG 59/F.] [_______________.] [Manufacturer and Model: [_________________________.]]

Main Distribution Cable: [RG11/F.] [_______________.] [Manufacturer and Model: [_________________________.]]

Branch Distribution Cable: (RG 59/F.] [RG 6/F.] [_______________.] [Manufacturer and Model: [_________________________.]]

Television Lead Cable: Provide set-matched cord[.] [with 75-300 ohm transformer.] Use [RG 59/F] [_____] coaxial cable, minimum length [6] [___] feet ([1.8] [___] m). [_______________.] [Manufacturer and Model: [_________________________.]]

Cabinet: [Free-standing equipment rack with hinged door.] [Surface mounted cabinet with adequate ventilation.]

Size: [As indicated.] [Selected by equipment manufacturer.] [______________________________.]

Cabinet Finish: [______________________________.]

Manufacturer and Model: [_________________________.]

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Connect cable television service in accordance with cable Utility instructions.

Provide raceway system [within inaccessible building finishes] under provisions of Section [16111.] [_____.]

Provide roof penetrations under provisions of Section [16111.] [_____.]

Install cable under provisions of Section [16120.] [_____.]

Use main distribution cable for distribution from main equipment to each room.

Use branch distribution cable for distribution within each room.

Provide boxes for mounting devices, cable pulling, and splicing cables under provisions of Section [16130.] [_____.]

Provide grounding under provisions of Section [16450.] [_____.]

Provide lightning protection under provisions of Section [16670.] [_____.]

ADJUSTING

Adjust work under provisions of Section [01650.] [01660.]

Adjust work under supervision of manufacturer's field service personnel.

Adjust each antenna using field strength meter to orient it for [maximum signal reception.] [acceptable signal reception on all channels.]

Adjust amplifier gain and make other system adjustments to achieve specified output levels at each outlet.

Adjust traps to [eliminate spurious interference.] [frequencies [_____,] [_____,] [and] [_____] MHz.]

DEMONSTRATION

Provide systems demonstration under provisions of Section [01670.] [_____.]

Demonstrate system operation and provide [two] [_____] hours of instruction with manufacturer's training personnel.

Conduct walking tour of Project and briefly describe function, operation, and maintenance of each component.

Include demonstration of color television operation [and specified signal level] at [two] [_____] outlets selected by Owner.

CONVERTER SCHEDULE

Converter C-1: Convert Channel 48 to Channel 6.

Converter C-2: Convert Channel 63 to Channel 10.

Converter C-4: Convert 72 to Channel F.

TAP SCHEDULE

Tap TVT-1: 12 dB isolation.

Tap TVT-2: 17 dB isolation.

Tap TVT-3: 16 dB isolation.

Tap TVT-4: 23 dB isolation.

END OF SECTION