[mythtv-users] Coax splitters - how painful are they?

Jay R. Ashworth jra at baylink.com
Wed Sep 26 00:29:07 UTC 2007

On Tue, Sep 25, 2007 at 04:11:29PM -0600, Brian Wood wrote:
> In case some folks have missed it, a perfect two-way split with no
> device losses would be a 3db. "loss" to each leg.

Assuming that both ports are correctly terminated into a clean 75 ohms.

>                                                      Actually nothing would
> be "lost" as all the power would be accounted for. In other words: If I
> have a cable with +30dbmv. comoing out of it, and I take away half of
> the signal power, I will then have +27dbmv., NOT +15dbmv.

Yep; decibal scales are logarithms.

-- jra
Jay R. Ashworth                   Baylink                      jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com                     '87 e24
St Petersburg FL USA      http://photo.imageinc.us             +1 727 647 1274

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