>>From what I know about the calibration procedures that one manufacturer
> uses, he has a lab calibrated HP436A Power meter and some attenuators that
> are used for comparison. If I remember right the 436 has an accuracy spec of
> 1.2%. Put that together with attenuator and cable errors and you would be
> very lucky to come out with 3% accuracy. But it is still probably better
> than the accuracy of a bird meter.
The cable and attenuator errors can be known without error, all he has to do
is pay a
cal laboratory to characterize each at the test frequencies.
--
Ron KA4INM - I'm proud to be Chuck's pop!
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