On Tue, 26 Apr 2005 19:59:59 +0000 (UTC), "Reg Edwards"
wrote:

But for the two figures to be of value the uncertainties in the
determination should be stated on the certificate (a legal document).

What are TYPICAL uncertainties, in dB, which appear above the Head of
the Laboratory's signature.

Hi Reg,

I thought Wes' link was quite specific to the matter:
Measurement Mismatch Correction Error 0.04
Noise Power of Power Sensor 0.00
Zero error of Power Sensor 0.00
Power Meter Linearity 0.04
Space Loss Measurement Error 0.01
Multipath Curve Fitting Random Error 0.04
Proximity Effect Correction Error 0.05
All expressed in dB and may be combined using the usual methods of
RMS, RSS, or worst case simple sum.

73's
Richard Clark, KB7QHC