On 8/30/18 8:15 AM, Mike Bafaro wrote:
According to what I have heard the 60KHz WWVB carrier is guaranteed accurate to
the atomic standard and is considered traceable. I remember when I was in the
Navy years ago I remember taking our unit's HP5245L for calibration and they
used a VLF tracking receiver at 60KHz to do the calibration. If WWVB goes off
the air what is the replacement for the 60KHz standard?
Mike
The 5245L is a 1960,70s vintage thing so I assume you were doing those
cals 40 years ago when inexpensive atomic standards like the SRS FS725
didn't exist.
These days, I suspect that a $3000 Rb box or a GPSDO would have
sufficient accuracy for this sort of thing as a transfer standard, and
would be traceable. I can't imagine that a "over the air" signal
recovered from WWVB would be better than either of those two.
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