[time-nuts] Frequency counter questions
jerry at hanler.com
Sun Apr 23 21:25:28 EDT 2017
For some reason I am not getting the individual emails so I apologize for not replying more promptly. I’ll have to check my profile.
As far as I can tell from the notes, and by the way, the number of notes was why I was trying to move this off list, to get to .001hz I need to measure over 1000 seconds. This is ok. Since I am looking for an average over time anyway, this is not a problem. By the way I am using a GPSDO and planned to use it divided down for the gate.
The only reason I mentioned a prescaler was that there was a 12 digit counter schematic on the web that looked pretty complete. This person used a prescaler and I was trying to wrap my head around how this helped with resolution and I guess from the replies, that is not a practical solution (using a prescaler) when you want high resolution unless I use the inverse operation which I can’t remember what it is called off the top of my head.
I’ve seen some HP 12 digit counters but since I have a GPSDO and who knows how many micro development boards around here, I thought I would take a run at it.
So to summarize, if I limit my high resolution to 99,999,999.999hz and use a gate of 1000 seconds, would that get me to .01hz? If not, then what would the possible resolution be?
Thanks for all the input, very helpful.
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