RCDD · Question #190
You are designing a building with a combination of Class A commercial office spaces and residences. The design program requires having unlimited cable channels available at all outlet locations…
The correct answer is A. Video over balanced twisted-pair. Video over balanced twisted-pair cannot carry the full broadband RF spectrum required for unlimited CATV channels, making it the topology that will NOT provide adequate channel distribution.
Question
You are designing a building with a combination of Class A commercial office spaces and residences. The design program requires having unlimited cable channels available at all outlet locations. What distribution system topology will NOT provide adequate channel distribution to each location?
Options
- AVideo over balanced twisted-pair
- BTrunk and tap
- CHome run
- DVideo over optical fiber
How the community answered
(23 responses)- A78% (18)
- B13% (3)
- C4% (1)
- D4% (1)
Why each option
Video over balanced twisted-pair cannot carry the full broadband RF spectrum required for unlimited CATV channels, making it the topology that will NOT provide adequate channel distribution.
Balanced twisted-pair (e.g., Cat 5e/6 UTP) has a usable bandwidth that is far too narrow to carry the full CATV RF spectrum (typically 5 MHz to 1 GHz), so it cannot support an unlimited number of channels. Systems using this medium are limited to a small set of channels delivered via encoding/transcoding, not native broadband RF distribution.
Trunk and tap uses broadband coaxial cable, which can carry the full CATV RF spectrum and therefore supports an unlimited channel lineup at every outlet.
A home-run topology runs individual coaxial cables from the headend to each outlet, providing the full broadband spectrum and unlimited channels at every location.
Video over optical fiber supports extremely wide bandwidth (well beyond the CATV spectrum) and can carry an unlimited number of channels to every outlet.
Concept tested: CATV distribution topology channel capacity limitations
Source: https://www.bicsi.org/standards/available-standards-free-download
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