RG-6/U, quad shield coaxial cable.
2.2
HEAD END EQUIPMENT
2.2.1
General
The head end shall utilize conditioning and transmission components as
specified and shown for receiving off-air television and FM signals and
interfacing them with the premises distribution system. Coaxial downlead
of off-air antenna shall be provided with preamplification as required to
supply the proper signal level input required by the head end equipment.
Equipment required to collect, condition, convert, and distribute signals
from the above sources for programming shall be furnished and installed by
the Contractor.
2.2.2
Off-Air Reception
2.2.2.1
Coaxial Downlead Preamplifier
Preamplifier shall be [single channel] [broadband] type. Preamplifier
shall be enclosed in a weatherproof housing with a universal bracket.
Appropriate power supply and power inserter shall be provided to power the
preamplifier through the coaxial downlead cable. Lightning protection shall
be inherent in the preamplifier design. Preamplifier shall as a minimum
conform to the following specifications:
Plus or minus 0.75 dB
Minimum Input:
Minus 20 dBmV
Return Loss:
14 dB
75 ohms
Maximum Noise
Figure:
VHF 6.5 dB
UHF
7.5 dB
2.2.2.2
Channel Mixers (Nonadjacent)
Channel mixers shall as a minimum conform to the following specifications:
Insertion Loss
(Maximum 54-216 MHz):
2.5 dB
Return Loss:
14 dB
Out-of-Band Rejection:
12 dB
75 ohms
2.2.2.3
Processors
A processor shall be provided for each channel translation specified.
Processors for channel translation shall as a minimum conform to the
following specifications:
SECTION 16785A
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