On 12 Jun 2002 at 12:58, Chris Carbaugh wrote:

> Hello all,
>
> I'm looking for a method to measure signal loss (db) on RG6 and RG11
> coax cable.  I think I can do this with just an ohm meter,

NOT really!
 The RF losses are orders of magnitude more than the resistive component of the wire.

 but I'm not
> sure how to cap the opposite end.
>
> What I'm trying to accomplish is to (1) calculate the actual loss on a
> coax run,

Why calculate when you can MEASURE.
There are LOTS of cable loss meters.
MFJ sells a reasonable meter, Bird, H.P. etc.

 and (2) calculate the length of the run by comparing signal
> loss to the specs from the manufacturer.
>
The losses are not stable over time.
Water (Vapor), cold flow of conductors, and dielectric breakdowns can make the loss
VERY different than the specs.

A TDR will show you the EXACT length.
Search on Time Domain Reflectometer.

> Most coax manufactures (I believe) specify signal loss per foot.

More like loss per 100 feet!
>
> Any help greatly appreciated,
> Chris
>
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