John Hoaglun wrote:

> 
> I am assuming that LO P is a status that is read from the RF Product
> Detector circuit at the output the of low pass filter rail.

There is only an envelope detector there, but I would have thought, if 
you have the KAT2, that it was the forward power from the SWR bridge.  A 
very mismatched load could, presumably, give a very low forward power.

-- 
David Woolley
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