[TowerTalk] Coax Losses on 160 and 75?

[Steve Hunt]

You can also measure loss using a single-port analyser.

The underpinning maths is here:
http://www.karinya.net/g3txq/wet_ll/tl_formulas.pdf

Steve G3TXQ


On 06/08/2016 07:03, Richard (Rick) Karlquist wrote:
> No, this isn't the real deal.  A 2 port vector network analyzer
> with full 2 port calibration is the real deal.  The wattmeter
> approach has many error effects that are difficult to account
> for.  The fact that the meters read identical when cascaded
> does not mean the subsequent measurement is perfect.
> The dummy load may have a mismatch.  The characteristic
> impedance of the line is not exactly 50 ohms and is actually
> complex in general.  Etc.
>