[mythtv-users] Coax splitters - how painful are they?
beww at beww.org
Sun Sep 30 16:21:40 UTC 2007
Jay R. Ashworth wrote:
> Well, the *optimal* approach is probably to get a commercial 10-port
> from someone like Channelmaster or Blonder Tongue and (if necessary)
> drive it with an amp, and then home-run all your cabling to it... but
> that's the RF-geek approach, and you might not think it worth the
No necessarily, especially if all of the destinations are not
equi-distant from the source point (in DB. of loss, not necessarily in
feet or meters).
One way to do it is the same way a cable system is designed. Have a
"trunk" run, with a directional coupler to split off the feed to each
device that it passes. DCs are available in many values of tap loss, so
you would calculate the level in the "trunk", the select the correct
value of tap so that the tap loss, plus the loss in the cable from the
tap to the device, results in the precise signal that the device wants
as an input.
Of course this presupposes that you have a way to know what the level is.
Essentially it all depends on the physical arrangement of the the
devices you want to feed. If they are all more or less the same distance
from your feed point then the home run from a central device makes
sense, if they are all spread along a vast distance then that iss not
the best approach.
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