[Elecraft] W1

[Ed Lambert]

It is probably necessary to restate my question with more precision.

1.       I have calibrated the K3s using Elecraft K3 Utility

2.       I have carefully calibrated the W1 using the DDM method with a good
quality DDM.

3.       Comparing the results, I see that the W1 consistently calculates
power about 1 dB higher than the K3s. Statistically, I would have expected
them to be closer. From the W1 specifications, and not knowing the K3s power
accuracy specifications, it seems that, possibly, the K3s is displaying
about 3 sigma low and the W1 3 sigma high, which is unlikely.

4.       The question: Should the K3s be calibrated from the W1 or should
the W1 be calibrated from the K3s?

(There could be a detailed, separate discussion of the meaning of "average"
power and "PEP" as used in the W1 programming reference. It is my belief
that the two should be the same thing if using a cw signal and the FCC
definition of "PEP". It would be interesting to know what is going on in the
K3s transmitter gain calibration process. It seems like there is an internal
power measurement process and the gain is being set against that. Does that
internal measurement process have accuracy equivalent to the W1 or vice
versa?)

 

Ed

KD3Y