freq counter?

[KA4HJH]

>Yes and no, Its easier to get a determination of the period, however the
>accuracy is poor, imagine determining length of a mile by replicating one
>foot over and over, if the foot is off by a tiny amount the error prorates
>over the entire measurement. Now having a length of 10000 miles and dividing
>by 10000, you get a much more accurate measure. That's why accurate freq.
>counters work this way. Does that make sense?

There was an article about LF counters in Circuit Cellar recently. 
There was a long discussion about the error problem. They were using 
an MCU to measure period with a few fancy tricks. As I recall it 
seemed like a good approach and of course the refresh rate was pretty 
high.


-- 
Terry Bowman, KA4HJH
"The Mac Doctor"