[time-nuts] Shielding a DAC line -> WWV

[Hal Murray]

lists at rtty.us said:
> Anything under 100 ppb relative to WWVB is probably closer than the
> ionosphere will let you get under normal conditions. You can indeed get a
> zero beat, but that's not always a guarantee that the carrier isn't moving
> around at some odd rate. Far better to use WWVB. The LF path is much more
> predictable, so you can pick "good" times to check it each day. After a few
> days you can have some pretty good information.  

Or you could turn into a time nut and graph the ionosphere delay.  Any long 
term drift would be due to the local reference clock.


-- 
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