Complete Compiled Specification.pdf - Peck Ormsby Construction

B. Requests for substitution of other products will be considered if submitted in accordance with
Section 01630.
2.2 CABLES:
A. Each reel of coaxial cable used in the system shall be sweep tested for transmission and
structural return loss and be so certified in writing by the cable manufacturer. Transmission
sweep tests shall establish conformance to guaranteed loss values from 20-108 MHz, 174-
216 MHz and 470-890 MHz. Structural return loss tests by sweep method shall show a
minimum, return loss of 26 dB RL VHF, 16 dB RL UHF as compared to a fixed 75-ohm
reference from 20-108 MHz, 174-216 MHz and from 470-890 Mhz.
B. Coaxial cables shall be run in continuous lengths except for terminations and no splices shall
be permitted in any conduit run. Cables shall be installed to avoid sharp bends or physical
distortion.
C. Individual drops to rooms shall be West Penn 25841 (RG-6U). Main trunk runs shall be West
Penn 25821 (RG-11) or as specified on the drawings, with drawing notes taking precedence.
D. Cable shall be approved for air plenum use if required by the construction.
2.3 SPLITTERS:
A. Two-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 the hybrid design
with a 75 ohm match of 23.0 dB RL minimum on all inputs and outputs. Output isolation shall
be not less than 23.0 dB VHF - 18.0 dB UHF.
B. 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 termination.
C. Four-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 the hybrid design
with a 75 ohm match of 24.0 dB RL minimum on all input and outputs. Output isolation shall
be not less than 16.0 dB VHF, 11.5 dB UHF.
D. Four-way line splitter shall have a signal loss of not more than VHF 6.2 dB; UHF 6.7 Db.
E. Splitters shall be Blonder-Tongue model MS-2U/V stock No. 3435 or MS-4U/V Stock No.
3436.
F. Multi-port Taps: Shall have a flat frequency response over the entire operating bandwidth of
550 Mhz. Taps shall be 8 port with equal loss between all ports. The unit shall be of the
hybrid design with a 75 ohm match of 24.0 dB.
G. Distribution Amplifiers: Shall have an operating range of 54-550 Mhz. and provide a flat gain
of 30 dB forward and 20 dB reverse with internal slope and tilt adjustment. Amplifier must be
117 volt AC line powered and must have modular power supply and mother-board and be
capable of modular internal equalization.
2.4 EQUIPMENT AND MATERIALS:
A. Agile Modulator: Blonder Tongue, AM-60-860, Qty: 1
SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009
TELEVISION SYSTEMS 16780-2