A13.REV

MASTER ANTENNA TELEVISION SYSTEM

NOTE: MASTER COPY DATE: JAN. 11, 1985

NOTE: CONTACT BUILDING ELECTRONIC SYSTEMS GROUP FOR ASSISTANCE IN PREPARING THIS SPECIFICATION SECTIO

Part 1 -	GENERAL

1)	SCOPE

It is the intention of these specifications to set forth the minimum requirements for the performance of a Master Antenna Television System, which can provide adequate and reliable television reception. It is understood that the equipment shall meet or exceed the requirements of the Electronic Industries Association (EIA), Underwriters Laboratories (UL) and the Federal Communications Commission (FCC) which are current at the time of installation

A.	The MATV System shall an intergrated highly reliable system consisting of the following

NOTE: SELECT AS APPLICABLE

1.	VHF Antennas.

2.	UHF Antennas.

3.	Broadband Antenna.

4.	VHF Preamplifiers.

5.	UHF Preamplifiers.

6.	VHF Amplifiers.

7.	UHF Amplifiers.

8.	Broadband Amplifier.

9.	UHF Reamplifiers.

10.	UHF/VHF Modulator.

11.	UHF/VHF Demodulator.

12.	Converters.

13.	Traps.

14.	Multiplexers.

15.	Bandpass Filters.

16.	Splitters.

17.	Tapoffs.

18.	Cable.

19.	Jack Fields.

20.	Equipment Racks.

B.	The bidder shall be responsible to perform an on-site survey of all receivable signals to determine available picture quality and potential interferences, and submit detailed report to Engineer

C.	Provide for the reception, amplification and distribution of the following off-the-air VHF and UHF TV channels

NOTE: CHANNELS LISTED ARE FOR NEW YORK CITY REGION - CONSULT CHANNEL DIRECTORY FOR CHANNELS AT PROPOSED SITE

1.	2 WCBS

2.	4 WNBC

3.	9 WOR

4.	11 WPIX

5.	13 WNET

6.	20 WTXX

7.	21 WLIW

8.	25 WNYE

9.	31 WNYC

10.	41 WCNY

11.	47 WNJV

12. 5 WNEW

13.	7 WABC

D.	System shall have a TASO Grade 2 quality picture or better at antenna location

E.	System components must be of the passive type and be sub-channel return capable

F.	System band pass 5-450 MHZ.

G.	System shall be designed for expansion to satellite TVRO, CATV, closed captioning, local origination, premium entertainment, or additional off-air reception. This shall be facilitated through head-end modification only

H.	System shall provide for ready attachment of television receivers at any outlet at any time without additional auxiliary equipment

NOTE: DELETE IF N.A. (FOR REMOTE ORIGINATION).

I.	Capable of remote origination using a single channel modulator for channel B-4 to channel 3

J.	Provide for the reception, amplification, and distribution of local FM signals

K.	Distribution system shall furnish signal to all TV outlets shown on drawings or areas delineated within this specification

L.	Provide reception quality at each outlet equal to or better than received with individual antennas in the particular area. Signal strength at each outlet shall be a minimum of 6 dBmV (2000 micro-volts across 75 ohms). If local pickup is a problem, the installer shall use higher signal levels at the outlet

M.	The system as installed, rated and capable of continuous 24-hour operation

NOTE: IF REQUIRED

N.	Patch Bays shall isolate individual sections for local origination (i.e. VCRs, cameras, etc.) and distribution

O.	Audio/Video demodulators shall be placed as shown on drawings.

P.	Provide conduit, wall boxes and electrical feeds for equipment.

Q.	Final appearance and finishes of all exposed equipments are subject to architect's approval

2)	ANTENNA LOCATION

A.	Antenna locations to be coordinated with pre-and or post construction signal strength survey.

NOTE: CHECK ELECTRICAL PROVISIONS

B.	Coaxial cable installed on roof in PVC conduit and laid neatly on roof

C.	Proper standoffs to be provided as necessary.

D.	Antennas shall be mounted using tripod roof mounts, or side mount, as approved antennas shall be properly spaced as to avoid interaction

3)	EQUIPMENT LOCATION

A.	Mechanical penthouse.

B.	Elevator machine room.

C.	Space and rack location to be coordinated with:

1.	Audio contractor.

2.	AMCS.

3.	Elevator contractor.

D.	(-----).

4)	SHOP DRAWINGS

A.	Complete drawings and manuals:

1.	Description of operation.

2.	Technical literature.

3.	Data bulletins.

B.	Associated wiring diagrams and block diagrams indicating proposed connections of all equipment types and model numbers

C.	Fully dimensioned housing and mount drawings, including information on finishes

D.	Wiring routes, and types.

5)	OPERATING INSTRUCTIONS

A.	Printed and Personnel Instructions:

1.	A comprehensive installation and instruction manual shall be supplied as part of the MATV System. This manual shall provide complete service information, including schematics, layout drawings, test and alignment procedures, intercabling diagrams, site survey and parts lists to permit quick and efficient maintenance and repair of the equipment by a qualified technician. All diagrams shall use national standards for CATV graphic symbols. Five copies are to be provided

2.	Functional diagram.

a.	Provide simplified single line block diagram showing interconnection of all major equipment components and functional relationships

b.	Mount one photographic or rag paper photocopy print (not blue print) behind acrylic at, or in rack

6)	GUARANTEES AND WARRANTEES

A.	Guarantee system in writing against defects in workmanship and material for one year after acceptance. During this time, the entire system is to be kept in proper operating condition at no additional labor or material cost to owner

B.	Service must be rendered within 24-hours of notification.

C.	The manufacturer of the major components shall maintain a replacement parts department and provide and recommend test equipment when needed. A complete parts department shall be located in geographical proximity consisten with the most expedient method of shipping replacement parts. An ample stock of individual components and equivalent unit replacements shall be carried for as long a period as demand warrants. This period shall extend well beyond the normal life expectancy of the equipment

Part 2 -	PRODUCTS

1)	EQUIPMENT

A.	Cables

1.	Each reel of coaxial cable used in the system sweep tested for transmission and structural return loss and be so certified. Sweep tests shall establish conformance to guaranteed loss values from 20-108 MHz, 174-216 MHz and 470-890 MHz. Structural return loss of 26 dBRL VHF, 1 dBRL UHF, as compared to a fixed 75 ohm reference from 20-108 MHz, 174-21 MHz and 470-890 MHz

2.	Coaxial cables; Belden RG-6/U type Duobond II & Braid, 9114, RG11/U type, 9292 or equivalent

B.	Coaxial cable connectors.

1.	Coaxial cable connectors shall be used to connect to equipment as required. Connectors shall be solderless, 75 ohm impedance and be designed for the specific type of cable used. RG-6 connectors shall be one piece

C.	Terminating resistors.

1.	Terminating resistors with 75 ohm impedance shall be installed at unused ports and feeder line ends. Terminating resistors shall be designed to cove the frequency range from 12 MHz to 890 MHz with minimum return loss of 2 dB at UHF and 30 dB across the VHF band. Non commercially fabricated terminators are not acceptable

D.	VHF Antennas

1.	Supply and install individual antennas for each VHF TV channel specified and for FM

2.	Antennas heavy duty, professional quality, Single channel, 75 ohm yagi antennas. Single channel antennas constructed of corrosion proof high grade heavy gage seamless aluminum tubing

4	3.	Antenna boom minimum of 1-1/4 in. o.d. x .058 wall thickness 6063-T832 hard drawn seamless tubing

4.	All elements shall be closed with permanent end caps.

5.	Elements mounted on a boom with 3/4 in. x 1-3/4 in. x 2-1/4 in. aluminum blocks which shall completely encircle the boom

6.	Antennas mounted to the structure with 1/8 in. x 4 in. x 6 in. aluminum plate and four 5/16 in. x 2 in. bolts

7.	Antennas constructed to withstand 100 mile per hour winds.

8.	Each VHF antenna shall meet or exceed the following:

NOTE: SPECIFY CHANNELS

a.	Low band

(1)	For channels: (-----)

(2)	Ten element

(a)	Gain over tuned 1/2 wave dipole: 12.5 dB.

(b)	Front-to-back ratio: 27 dB.

(c)	Attenuation of undersired side lobes: 22 dB.

(d)	Beam with (-3 dB points):

(A)	Vertical: 48 deg.

(B)	Horizontal: 38 deg.

(e)	Bandwidth: 6 MHz TV Channels, 20 MHz FM.

(f)	Impedance: 75 ohm Gamma matched.

(g)	Backmatch: 14 dB return loss minimum over entire channel (VSWR 1.5:1)

NOTE: SPECIFY CHANNELS

b.	High band

(1)	For channels: (-----)

(2)	Five element

(a)	Gain over tuned 1/2 wave dipole: 9.6 dB.

(b)	Front-to-back ratio: 23 dB.

(c)	Attenuation of undesired side lobes: 18 dB.

(d)	Beam width (-3dB points):

(A)	Vertical: 63 deg.

(B)	Horizontal: 52 deg.

(e)	Bandwidth: 6 MHz TV Channels, 20 MHz FM.

(f)	Impedance: 75 ohm Gamma matched.

(g)	Backmatch: 14 dB return loss minimum over entire channel (VSWR 1.5:1)

9.	Antennas installed on 1-1/4 in. corrosion resistant rigid conduit masts. Refer to drawings for mounting details

10.	Antennas properly spaced to avoid interaction.

11.	FM antenna, omni-directional and receive the full 88-108 MHz frequency range

12.	The five element antennas Blonder-Tongue Y-5 series or equivalent.

13.	The ten element antennas; Blonder-Tongue Y-10 series or equivalent.

E.	UHF Antennas

1.	Supply and install individual antennas for each UHF channel specified.

2.	Antennas heavy duty, professional quality, single channel, 75 ohm yagi Antennas

3.	Single channel antennas constructed of corrosion proof, high grade, heavy gage, seamless aluminum tubing

4.	Antenna booms, 3/4 in. O.D. x .058 in. wall thickness 6063-T832 hard drawn seamless aluminum tubing

5.	Elements mounted on boom with 1-9/16 in. x 1 in. x 3/4 in. solid aluminum blocks which shall completely encircle the boom

6.	Antennas mount to mast structure at rear of the antenna boom mast shall not pass between antenna elements

7.	Antennas constructed to withstand 100 mile per hour winds.

8.	Each UHF antenna shall meet or exceed the following:

a.	Gain over 1/2 in. wave dipole: 12 dB.

b.	Front-to-back ratio: 27 dB.

c.	Attenuation of undesired side lobes: 22 dB.

d.	Beam width (-3 dB points):

(1)	Vertical: 48 deg.

(2)	Horizontal: 38 deg.

e.	Bandwidth: 6 MHz.

f.	Impedance: 75 ohm gamma match.

g.	Backmatch: .14 dB return loss (VSWR 1.51:1).

9.	Antennas installed on 1-1/4 in. corrosion resistent rigid conduit masts. Refer to drawings for mounting details

10.	The UHF antennas; Blonder-Tongue Y-10 series antennas or equivalent

F.	Broadband antenna:

1.	The contrator shall supply and install an individual antenna for channels 2-83 and FM

2.	Heavy duty, professional quality.

3.	Constructed of corrosion proof, high grade, heavy gage, seamless aluminum tubing

4.	Antenna booms 3/4 in. OD x 0.58 in. wall thickness 6063-T832 hard drawn seamless aluminum tubing

5.	Elements mounted on boom with 1-9/16 in. x 1 in. x 3/4 in. solid aluminum blocks which completely encircle the boom

6.	Constructed to withstand 100 mile per hour winds.

7.	Meet or exceed the following specifications:

a.	Gain (avg) relative to dipole:

(1)	Low: 4.25 dB.

(2)	High: 7.25 dB.

(3)	FM: 3 dB.

(4)	UHF: 8 dB.

b.	Beam width (-3dB):

(1)	Low: 67.

(2)	High: 29.

(3)	FM: 74.

(4)	UHF: 31.

c.	Front-to-back ratio (avg):

(1)	Low: 25 dB.

(2)	High: 24 dB.

(3)	FM: 16 DB.

(4)	UHF: 21 dB.

d.	Boom length:

(1)	Maximum 159 in..

e.	Turning radius:

(1)	95 in.

8.	Installed on 1-1/4 in. corrosion resistent rigid conduit mast. Refer to drawings for mounting details

9.	Antenna; Blonder - Tongue 0719-4629 or approved equal.

G.	VHF Preamplifiers

1.	Preamplifiers for each VHF TV channel and the FM band as required.

2.	Preamplifiers designed for mast mounting.

3.	Each VHF channel preamplifier noise figure not to exceed 3 db.

4.	Each VHF channel preamplifier to have "F" type output connector.

5.	Each VHF channel preamplifier shall meet or exceed the following:

a.	Gain:

(1)	Channel 2 through 6: 27 dB minimum, 30 dB typical.

(2)	Channel 7 through 13: 24 dB minimum, 26 dB typical.

b.	Bandpass flatness:

(1)	Channel 2-13: 6 MHz 0.25 dB.

c.	Noise figure:

(1)	Channel 2 through 6: less than 3.0 dB.

(2)	Chennel 2 through 13: less ehan 2.5 dB.

(3)	Input/output impedance: 75 ohms.

d.	Connectors: input/output, output monitor all "F" type.

e.	Input match:

(1)	Channel 2 through 6: 14 dB minimum, 20 dB typical.

(2)	Channel 7 through 13: 24 dB minimum, 8 dB typical.

f.	Input impedance: 75 ohms.

g.	Selectivity: 12 dB minimum, down 9 MHz from channel center frequency (14 dB typical)

h.	Minimum recommended input for TASO.

i.	Grade 1 (Excellent) Picture: 300 uv (-10 dBmV).

j.	Overload rejection:

(1)	Maximum input for just perceptible cross modulation:

(a)	dBmV low band.

(b)	dBmV high band.

k.	Output match:

(1)	Channel 2 through 6: 8 dB minimum, 10 dB typical.

(2)	Channel 7 through 13: 4 dB minimum, 8 dB typical.

(3)	Output monitor jack: 20 dB lower than outout signal level (backmatched)

(4)	Operating ambient temperature range: -40 deg F to & 140 deg F.

(5)	Power requirement: -21 V DC at 40ma, regulated power supply.

6.	Each FM Band preamplified shall meet or exceed the following.

a.	Gain: 20 dB minimum (24 dB typical).

b.	Bandpass: 20 MHz plus or minus dB.

c.	Noise figure: better than 30 dB (2.0 dB typical).

d.	Impedance:

(1)	Input: 75 ohm F connector: return loss, more than 8 dBRL.

(2)	Output: 75 ohm F connector: return loss, more than 8 dBRL.

e.	Operational ambient temperature: - 40 deg F to 140 deg F.

f.	Power supply: -21 V DC @ 40 ma.

7.	The VHF channel preamplifier; Blonder-Tongue model CMAB or equivalent

8.	The power supply; Blonder-Tongue model regulated -21 V DC supply No. 1526 or equivalent

H.	UHF Preamplifiers

1.	Preamplifiers for each UHF Channel to be used as required.

2.	Each UHF channel preamplifier shall meet or exceed the following:

a.	Center frequency: any channel 14-83.

b.	Bandpass: plus or minus 1/4 dB over specified channel.

c.	Typical noise figure:

(1)	Channels 14 through 39: 4.5 dB.

(2)	Channels 40 through 69: 5.0 dB.

d.	Minimum input signal for TASO grade 1 picture: -8 dBmV (400mv).

e.	Minimum gain: 20 dB.

f.	Maximum input signal: plus 22 dBmV.

g.	Input/output impedance: 75/ohm F connector.

h.	Operating ambient temperature: -40 deg F to +140 deg F.

i.	Power supply: -21 V DC regulated.

3.	The UHF channel Preamplifier; Blonder-Tongue CMA-UB-75 or equivalent

4.	The power supply; Blonder-Tongue Model regulated -21 V DC supply #1526 or equivalent

I.	VHF Amplifiers

1.	The headend system completely solid state, modular system with single channel AGC controlled amplifiers for each VHF channel specified

2.	Each amplifier shall meet or exceed the following:

a.	Maximum output for 1/2 dB.

(1)	Sync compressions: 69.0 dBmV (2.8 min volts) 70.5 dBmV (3.3 volts) typical

(2)	Recommended output operating level for color operation in alternate or adjacent channel systems 920 KHz beat at -55 dB, adjacent channel beat at -5 dB, with sound carrier adjusted to -15 dB, color subcarrier -25 db: 68.0 dBmV (2.5 volts) min. 69.5 dBmV (3.0 volts) typical

(3)	Gain: 55.0 dB min.; 60.0 dB typical.

(4)	Noise figure at full gain: 5.5 dB typical.

(5)	Output level control range: 20 dB min.

(6)	AGC range: 40 dB min.

(7)	AGC stiffness: 43 dBmV.

b.	Bandpass flatness, 6 MHz, BW: plus or minus 1.0 dB max., plus or minus 0.5 dB typical

c.	Alternate channel rejection: -26 dB (plus or minus MHz from channel center)

d.	Input match: 11 dB return loss.

e.	Output match: 18 dB return loss.

3.	The channel of operation imprinted at the factory on the face of each amplifier

4.	Each amplifier to have a built-in adjustable notchtrap which shall be accessible through the front panel to set the aural carrier level for minimum intermodulation products

5.	Output loop through connections provided for mixing outputs of other single channel amplifiers. This loop through shall incorporate an internal directional coupler and bandpass filter to prevent possible interference between amplifiers due to mixing. External mixing with directional couplers shall not be acceptable because of the signal loss incurred with this method. Loop through loss shall not be more than 0.2 dB regardless of the number of non-adjacent channel amplifiers in loop through

6.	The output shall be backmatched to terminate ghost and smear causing reflections originally in the distribution system. Backmatch, on channel, shall be a minimum of 20 dB return loss from 50 MHz to 220 MHz

7.	Test jacks shall be backmatched, to prevent measurement error when measuring signal level with a field strength meter. Test jacks which do not present a 75 ohm source to the field strength meter will not be acceptable

8.	Test jacks to have at least 30 dB isolation to prevent loading of the output circuits. Test jack shall be "F" type

9.	All connections and controls to be mounted on the front of the unit. These shall include; input jack, output jack, mixing input jack, output test jack, pilot lamp, fuse, convenience outlet and output level adjustment access

10.	The single channel amplifiers; Blonder-Tongue model MCA-b or equivalent

J.	UHF Amplifiers

1.	Systems distributing UHF on-channel shall incorporate and AGC controlled UHF channel amplifier for each channel specified

2.	Each channel amplifier shall meet or exceed the following:

a.	Gain: 54 dB maximum, 24 dB min.

b.	Output: plus or minus to 70 dBmV (.3 V-30 V).

c.	Noise figure: 7.5 dB (at full gain).

d.	Minimum input: -5 dBmV (6 mv) for TASO Grade 1 (excellent) picture.

e.	Recommend input for AGC Action: 10 dBmV minimum to 40 dBmV maximum

f.	AGC range: 30 dB.

g.	Bandpass: plus or minus dB at 6 MHz Bandwidth.

h.	Input match: 12 dB return loss (1.67 VSWR).

i.	Output match: 10 dB return loss.

j.	Test points: -30 dB backmatched output test jack.

3.	The channel of operation clearly imprinted at the facory on the face of each amplifier

4.	Directional coupler output connections. Amplifier output loop-through connections shall be provided for mixing outputs of other single channel amplifiers a minimum of four channels apart. This loop-through shall incorporate an internal directional coupler and bandpass filter to prevent possible interference between amplifiers due to mixing external mixing with directional couplers shall not be acceptable because of signal loss incurred with this method. Loop-through loss shall not be more than 0.5 dB for each channel regardless of the number of non-adjacent channel amplifiers in loop-through output

5.	The output backmatched to terminate ghost and smear causing reflections originating in the distribution system

6.	Test jacks backmatched, to prevent measurement error when measuring signal level with a field strength meter. Test jacks which do not present a 75 ohm source to the field strength meter will not be acceptable

7.	Backmatch on channel, minimum of 10 dB return loss. Backmatch 24 MHz from channel, shall be a minimum of 11 dB return loss from 470 MHz to 890 MHz

8.	Output test jacks to have at least 30 dB isolation to prevent loading of the output circuits. Test jacks shall be of the "F" type

9.	A continuously adjustable output level control provided for output settings to balance other system amplifiers. Maximum gain shall be plus or minus 58 dB

10.	All connections and controls mounted on the front of the unit, input jack, output jack, mixing outputs, output test jack, pilot lamp, fuse, convenience outlet and output level adjustment access

11.	The single channel UHF amplifier; Blonder-Tongue model MCA-Ub or equivalent

K.	Broadband Amplifier:

1.	Amplifier shall meet or exceed the following:

a.	Band pass: 50-400 MHZ.

b.	Band pass featness: plus or minus 0.75 dB.

c.	Gain (typical) adjustable from: 28 dB to 43 dB.

d.	12 cha. flat -57 db cross mod.: 55.0

e.	21 chs, flat -57 db cross mod.: 52.5

f.	35 chs flat -57 db cross mod.: 50.0

g.	Triple beat products at 35 ch output level: -75 dB.

h.	Second order products at 35 ch output level: -65 dB.

i.	Hum modulation: -60 dB.

j.	Noise figure (full gain): 8.5 dB.

k.	Gain control range (min): 15 DB variable.

l.	Slope control: 15 dB variable.

m.	Input return loss: 13 dB.

n.	Output return loss: 15 dB.

L.	UHF Reamplifiers

1.	Reamplifiers for UHF used as required.

2.	Reamplifiers shall meet or exceed the following:

a.	Input impedence: 75 ohm 12-215 MHz 20 dB return loss (VSWR 1.22) 470-890 MHz 10 dB return loss (VSWR 1.92)

b.	Gain:

(1)	470-890 MHz: 12 dB minimum.

c.	Bypass loss:

(1)	12-216 MHz: 0.8 dB maximum.

d.	Tilt:

(1)	470-806 MHz: 3.0 dB plus or minus 1.0 dB.

e.	Return loss:

(1)	Input, 470-890 mHz: 10 dBRL minimum.

(2)	Output, 470-806 MHz: (VSWR 1.92).

(3)	Noise figure: 12.0 dB maximum.

f.	Input capability: 30.5 dBmV per channel for each of 3 UHF channels.

g.	Output capability: 43 dBmV per channel for each of 3 UHF channels.

h.	Power from RF line: -21 VDC at 40ma.

3.	The UHF Reamplifiers; Blonder-Tongue model Mighty-Mite-S#4656 or equivalent

4.	The power supply for reamplifiers; Blonder-Tongue Model regulated -21 VDC supply of adequate current capacity models #1526 or #1536 or equivalent

M.	VHF/UHF Modulator

1.	An Audio/Video modulator provided for channel 3 to channel B-4 for local origination of programming

2.	The single channel modulator shall meet or exceed the following specifications

a.	RF:

(1)	Spurious Beats incl. those in adjacent channel (at +54 dBmV output): -60 dB

(2)	75 ohm return loss, on channel: 16 dB.

(3)	Thru RF input insertion loss: .6dB.

b.	Visual.

(1)	Output Level.

(2)	Sub Band: +61 dBmV.

(3)	Low Band: +61 dBmV.

(4)	Mid Band: +60 dBmV.

(5)	High Band: +59 dBmV.

(6)	Level control at Min.: +46 dBmV.

(7)	Frequency Stability: plus or minus .055%.

(8)	Frequency Response plus or minus 1 dB FU to FV + 4.2 MHz

(9)	Signal to Noise Ratio: 65 dB.

(10)	THD (at 15 KHz, 1 V, p-p Sine wave): 1.5%.

(11)	Vestigial-Sideband Response: Optimum for adjacent channel operation.

(12)	Differential Gain: 1 dB.

(13)	Differential Phase: 3 deg.

(14)	Video Inputs: Two, 1 video terminating; 1 loop-thru input; switch selectable

(15)	Input sensitivity (for 8.75% modulation): 0.5 V p-p, loop-thru input.

c.	Aural:

(1)	Output level max.: Greater than (pix-10 dB)

(2)	Level control at min: Less than (pix-20 dB).

(3)	Intercarr. Freq. Stab.: Plus or Minus 1 KHz, + 30 deg F to 122 deg F (+ 500 KHz typical)

(4)	Max. Mod. Deviation: 75 KHz.

(5)	Frequency Response: plus or minus dB, 50 phz to 15 KHz line; Plus or Minus 1 dB, 200 Hz to 10 KHz Mic

(6)	Hum and Noise: -60 dB.

(7)	Distortion: 0.7% at 25 KHz Dev.; 1.5% at 75 KHz Dev.

(8)	Input Impedance: Line 150K ohms balanced (bridging). 600 ohm Mic, Low-Z balanced 150 ohm transformer

(9)	Input sensitivity for 25 KHZ deviation: Line 70 mV; Mic 0.1 mV.

3.	The single channel modulator; Blonder-Tongue model #4930 or equivalent.

4.	The single channel modulator for sub-channel B-4 with origination from any MATV outlet

N.	Demodulator:

1.	An Audio/Video demodulator provided capable of accepting and standard VHF-TV or UHF channel input and providing high quality video and audio outputs

2.	The unit is to be equipped with automatic fine tunning for all VHF and UHF channels

3.	The unit equipped with automatic noise cancelling.

4.	The demodulator shall meet or exceed the following specifications:

a.	Channel Selectors: VHF, Turret type, UHF Detent type.

b.	Noise Figure: VHF: Greater than 6 dB; UHF: Greater than 12.5 dB

c.	Minimum input level: -36 dmV.

d.	RF Sensitivity: Greater than 15 uV.

e.	Audio Output: 600 ohms at 0 dB, unbalanced 0.25 VP-P max.

f.	Video Output: 1.5 VP-P adjustable.

5.	The Audio-Visual demodulator; General Instrument (Jerrold) model DM-283 or Equivalent

O.	Converters.

1.	VHF converters shall be supplied as required to convert sub-channels to UHF channels

2.	UHF converters shall be solid-state crystal controlled.

3.	Each converter shall meet or exceed the following specifications.

a.	Gain Minimum: Sub-Channel: 10 dB.

b.	Maximum input: 30 dB.

c.	Connections: 75 ohm coaxial inputs and outputs.

d.	Bandpass: 6 MHz.

e.	Oscillator Accuracy: .005%.

4.	The VHF converter; Blonder-Tongue model X0-26 #1428 or equivalent.

P.	Head-End Equipment Housing.

1.	Free standing, 16 gauge steel, welded construction, scratch resistant, baked on black enamel finish

2.	Front and rear access panels, required louvered vent opening top or bottom wiring entry

3.	Fans with two shaded pole induction motors and 2 in. diameter (102 mm) nylon blades mounted at bottom of each rack as required

4.	Doors shall be provided with keyed-alike locks.

5.	Housing shall be 19 in. rack type with 78 3/4 in. of vertical mounting space. Housing shall be no larger than 24 in. wide x 87 in. long x 32 in. deep

Q.	Traps.

1.	VHF/FM single frequency traps of the phase cancellation type used to reduce sound carriers or supress interferring signals as required

2.	The traps to have a single frequency attenuation of at least 60 dB and pass all other frequencies from 54 to 216 MHz with a maximum loss of 1 dB. Notch depth shall be continously adjustable by means of a notch depth control

3.	Input and output shall be 75 ohm with a return loss of 30 dB.

4.	UHF single frequency traps of phase cancellation type shall be used to supress interferring signals as required

5.	The traps to have a single frequency attenuation of at least 50 dB and pass all other frequencies from 54 to 216 MHz and 470-890 MHz with a maximum loss of 1 dB. Notch band width shall be 8 MHz at 3 dB down 3 MHz at 12 dB down, 1.8 MHz at 20 dB, 0.4 MHz at 30 dB and less than . MHz at 40 dB down

6.	Input and output shall be 75 ohm with return loss of 20 dB.

R.	Bandpass Filters.

1.	Single channel bandpass filters installed ahead of each strip amplifier as required to reject adjacent off-air channels or spurious signals

2.	Each bandpass filter shall meet or exceed the following:

a.	Impedance: 75 ohms.

b.	Return Loss - Input/Output (between video and sound carrier): 13 dB

c.	Insertion Loss (Low-Band) at picture carrier: 3.5 dB.

d.	Sound carrier Ref. to Pix: -2.0 dB.

e.	Insertion Loss (High-Band) at picture carrier: 8.0 dB.

f.	Sound carrier Ref. to Pix: -2.0 dB.

g.	Bandpass Flatness Ref. to Picture carrier: Plus or Minus 1.5 dB.

h.	Selectivity-Low Band:

(1)	Trap-Lower Adj. Sound: 70 dB Down.

(2)	Trap - Upper Adj. Video: 70 dB Down.

(3)	Lower Adj. Video: 40 dB Down.

(4)	Upper Adj. Sound: 50 dB Down.

(5)	Lower Adj. Band Edge: 55 dB Down.

(6)	Upper Adj. Band Edge: 55 dB Down.

i.	Selectivity - High Band.

(1)	Trap-Lower Adj. Sound: 70 dB down.

(2)	Trap-Upper Adj. Video: 70 dB Down.

(3)	Lower Adj. Video: 40 dB Down.

(4)	Lower Adj. Sound: 45 dB Down.

(5)	Lower Adj. Band Edge: 50 dB Down.

(6)	Upper Adj. Band Edge: 50 dB Down.

3.	The single channel bandpass filters; Blonder-Tongue model BPF-A or equivalent

S.	Splitters.

1.	"2" Way line splitters shall have a flat frequency response over the entire operating band from 12 MHz to 300 MHz and from 470 to 890 MHz. The unit shall be of Hybrid Design with a 75 ohm match of 24.0 dBRL minimum on all inputs and outputs. Output isolation shall be not less than 23.0 dB VHF; 18.0 dB UHF

2.	Two-way line splitters shall have a signal loss of not more than VHF 3.7 dB, UHF 4.0 dB at each output. All unused outputs on the Splitters shall be terminated with 75 ohm terminations

3.	"4" Way Line Splitters shall have a flat frequency response over the entire operating band from 12 MHz to 216 MHz and from 470 to 890 MHz. The unit shall be of hybrid design with a 75 ohm match of 24.0 dBRL minimum on all input and outputs. Output isolation shall be not less than VHF 6.2 dB, UHF 6.7 dB

4.	Four way line splitters shall have signal loss of not more than VHF 6.2 dB; UHF 6.7 dB

T.	Tapoffs.

1.	Wall type tapoffs provided at each location shown on the building plans.

2.	The tapoffs isolation network shall be of the backmatched type design, using high quality torridal ferrite transformer circuits

3.	Provisions to be incorporated in the network to prevent 60 cycles AC or DC Feedback into the feeder or trunk lines

4.	Tapoffs shall have type G/F connectors and shall accept quick disconnect plugs

5.	The tapoffs shall accept RG-6 cables.

6.	The through-line shields shall be grounded with a sawtooth washer.

7.	Positive electrical connection to the cable center conductor shall be provided by a center conductor clutch

8.	Each Tapoff shall meet or exceed the following:

Tap Value Backmatch (Typical Return Loss)

UHF VHF

12 dB 12 dB 16 dB

17 dB 10 dB 14 dB

23 dB 10 dB 15 d

9.	Tapoff; Blonder-Tongue model #4773 or equivalent.

U.	Patching.

1.	All patching jacks shall be of Western Electric Type Coax Jack with BNC rear connector

2.	A Dual Coax Jack which automatically provides a "normal thru" signal path without the use of Looping plugs or Patch cords shall be used

3.	Patch cords will be supplied as necessary to accomplish isolation and local feed. All patch cords shall be 75 ohm, .090 pin (WE) type

Part 3 -	INSTALLATION AND EXECUTION

1)	GENERAL

A.	As it is not practical to enumerate in these specifications all details of fittings and accessory equipment required for proper operation of the syste herein described, it is understood that they will be supplied by the contractor without extra compensation

B.	All fittings, pads, terminations, filters, multiplexers, wave traps, etc., needed to provide the best performance possible at the present state of the art will be supplied at no additional cost

2)	CABLE MATCHES

A.	The contractor shall provide twenty 10 foot 75 ohm coaxial cable with "F" connectors on each end, plus one 75 ohm to 300 ohm matching transformer for each cable

3)	GENERAL EQUIPMENT

A.	Electronic component models must have been commercially available for at least one year prior to bid

B.	Where specific equipment is described, it is not the intention to discriminate against the products of other manufacturers, but rather to establish a standard of quality. Any bid alternates must be accompanied with complete data

4)	INSTALLATION

A.	Installation of Coaxial Cables: Fastening of coaxial cables shall be by means of hardware attached securely and so as to avoid sharp bends and to prevent rubbing against sharp corners to prevent injury to or physical distortion of the cable

B.	Installation in buildings: Coaxial cable installed in buildings shall be run in conduit. The point at which cable enter the building shall be made weathertight, and cable shall be protected possible damage due to contact with sharp corners. Shielding effects provided by the cable shield or the cable shield and conduit shall reduce undesired rediation to the limits specified. Cable shall be secured to buildings with suitable fasteners at intervals not greater than (3) feet and shall be located a minimum of (2)-inches from heatin and air conditioning ducts and pipe. Cable and terminal outlets shall be installed by the contractor while building is under construction

C.	Wire all systems in accordance with National Electrical Code, and any other authority having jurisdiction. When a conflict occurs follow the most stringent requirement

1.	Coaxial cables to be run in continuous lengths except for terminations and no splices shall be permitted in any conduit run. Coaxial cables clearly tagged with destination markings.

5)	RECORD DRAWINGS

A.	The drawings of the MATV System shall be submitted on washable mylar at the conclusion of the installation. These record drawings shall be as-built and as-approved. All correlative notations on shop drawings shall b neatly incorporated along with all field installation variations

B.	The record mylars and two prints of same shall be submitted.

6)	SPARES.

A.	Provide, one pair of connector crimpers, 50 extra connectors, 100 ft of RG-6 coaxial cable

7)	FIELD AND ACCEPTANCE TESTS:

A.	General: All defective material and workmanship disclosed as the result of the tests given herein shall be corrected. The Contactor shall show by demonstration in service that all circuits and devices are in good operating condition. Test shall be such that each item of control equipment will functio no less than five times

B.	Extent and Description of Field tests: System shall be subjected to all necessary test, including those listed below

1.	Input Signal: Voltages from the antenna, converters, or preamplifiers shall be measured at the main amplifier input on all required channels. Signal shall be observed on each required channel using a receiver. In case of a poor signal, measurments and observations may be required at the antenna terminals on the mast to verify that no improvement of the signal is feasible

2.	System Frequency Response: With antennas disconnected, a wideband signal from the output of a sweep generator shall be inserted at the input at the head-end of the system. The output level of the sweep generator shall be equal to the mean operating levels obtained from the antenna signals. The signals shall be inserted when the system is set for normal operating conditions. A test set shall be inserted at the extremity of any line and the frequency response as seen on an oscilloscope shall not vary more than plus or minus 3 decibels over the bandwidth of any channel being used on the system

3.	System Signal-to-Noise Ratio: With the system in normal operating condition but antennas disconnected, a one-millivolt CW signal shall be inserted at the head-end of the system on both the lowest channel and the highest channel on low VHF band, and again on the high VHF band. At the extremities of any line in the system, a field-strength meter shall be connecte and tuned to the picture carrier of the channels under test. The field strength meter shall then be tuned to the midchannel of the channels under test. Ratio between the signals measured in each case provides the system signal-to-noise ratio when expressed in decibels. The signal-to- noise ratio shall not be less than 40 decibels. Example: Measure signal on channels (2) and (6), noise on (4); then measure signals on channels (7) and (13), noise on (10)

4.	Signal at Outlets: Using the field-strength meter, the video level for the highest and lowest frequency channel distributed on the system shall be read at various taps at random. The signal on each channel shall read not les than 1,000 microvolts and not more than 15,000 microvolts and the ratio shall not exceed 7.5 decibels. Using the receiver used at the antenna site, the various channels shall be observed at various outlets, to reproduce a signal of equal or better quality than obtained at the antenna

5.	In no case shall the levels measured exceed the maximum output rating for the headend amplifier(s) employed

6.	The level difference between channel picture carriers shall not exceed 2 dB for adjacent channels nor 12 dB between the strongest and weakest channe normally carried

7.	All channels shall have a picture carrier to sound carrier level ratio of not less than 12 dBnor more than 16 dB

8.	Individual channel strip amplifiers shall be tested for AGC operation. The measured field strength level at the outputof each amplifier shall not vary more than plus or monis -1.0 dB with the insertion of 15 dB of attenuation in the amplifier input signal

C.	Tests and Inspections: The Engineer shall witness all field tests specified in this section. The contractor shall perform all field tests, and provide all labor, equipment and incidentals required for testing

D.	Retesting: Any deficiencies found shall be rectified and work affected by such deficiencies shall be completely retested at Contactor expense

8)	BASE BID MANUFACTURES

A.	Blonder-Tounge

B.	General Instrument (Jerrold)