Mike,
I believe you are mixing parameters. The K3 can be set to within 1 Hz,
but the 0.5 ppm number applies the drift with temperature changes, and
that is something quite different than accuracy.
73,
Don W3FPR
Mike S wrote:
Can the high stability reference also be calibrated at temperature to
achieve 1 Hz, like the standard reference, or must one trust the
calibration table which provides 0.2-0.5 ppm (10-25 Hz) accuracy? If
calibrated at temperature, does the delta then offset other table
entries (which might be used to accommodate crystal aging, for
example), or are individual table entries calibrated? Can a
calibration table be used with the standard reference?
I can see some applications where "1 Hz, but you have to calibrate if
the temp changes" is better than "10-25 Hz, but you never touch it."
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