From: Michael Tope <W4EF@pacbell.net>
To: "'TowerTalk'" <email@example.com>
Subject: RE: [TowerTalk] Antenna Measurements
Date sent: Sat, 19 Jun 1999 01:29:51 +0100
> The absolute signal levels in dBm that are published in the comparison
> report are consistent with pattern look angles that are significantly
> attenuated relative to expected boresight gain. In my mind, any
> suggestion, implied or otherwise, that boresight performance of the
> antennas under test can be extrapolated from field strength measurement
> made deep inside a pattern null is dubious. This is not to say that the
> tests weren't carried out with great diligence and care. I believe they
> were. I am only concerned about the strength of the link between the test
> data and actual skywave performance.
Well put Mike.
Measuring in a null, no matter WHY it is there, is always a bad
idea (unless that is the point of the pattern you are interested in
using to communicate).
73, Tom W8JI
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