Coaxial Signal Distance Records - anyone know?

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tigerbay
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Coaxial Signal Distance Records - anyone know?

Post by tigerbay »

I pondered a hypothetical question for fun, what is the longest distance a signal (both analogue and digital) can travel through a coaxial cable (depending on it's design and materials) without being 'boosted' further down the line to a receiver (if this was in a 'cable-only' reception scenario) :)
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Tigersaw
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Re: Coaxial Signal Distance Records - anyone know?

Post by Tigersaw »

OK, just for fun, lets say 1000 watts in at one end, and a loss of 3db per 100 metres. Lets say we can detect the signal at -120db, so thats a loss of 180db from input to output. 180/3 *100 is 6km Doesn't sound much does it?
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ghost123uk
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Re: Coaxial Signal Distance Records - anyone know?

Post by ghost123uk »

^^^ Blinkin doesn’t sound much :o :shock:

Interesting question though Image

I know that the electricity companies send coms between power stations down the high voltage distribution cables (or at least they used to, not sure about now) and they must be a fair distance apart.
John, on the S. Cheshire / N. Shropshire border. 26TM953 / muppet handle "Grey ghost"
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rogerbeep
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Re: Coaxial Signal Distance Records - anyone know?

Post by rogerbeep »

It depends on:
- Coax type
- Input power
- Input frequency
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tigerbay
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Re: Coaxial Signal Distance Records - anyone know?

Post by tigerbay »

ghost123uk wrote: 23 Jan 2018, 15:19 ^^^ Blinkin doesn’t sound much :o :shock:

Interesting question though Image

I know that the electricity companies send coms between power stations down the high voltage distribution cables (or at least they used to, not sure about now) and they must be a fair distance apart.
Thanks ghost123uk :D

Also, does the dynamics change with an 'internal loop' set-up? (is this sent by balanced line or by coax?)
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