[time-nuts] 5370 processor boards available
magnus at rubidium.dyndns.org
Sat Mar 1 05:05:10 EST 2014
On 28/02/14 04:50, John Seamons wrote:
> On Feb 28, 2014, at 4:34 PM, Bob Camp <lists at rtty.us> wrote:
>> Is there any performance data on how the card does with a 5370A and / or a 5370B compared to the original CPU on the exact same box? Put another way - does the counter get better or worse with the new card? I realize that an A will do some things with B firmware, that’s not the question I’m asking. I’m looking for A to A or B to B timing data.
> Yes. I made some measurements with the previous microcontroller-based board (48 MHz sam7x) versus the stock CPU card. I have not yet had a chance to repeat that exercise with the current board. Look at the 23-Jul-2011 entry on <www.jks.com/5370/5370.html> Very much dependent on what the measurement is, but a range of 5-72% faster.
Early in the beta process there where an issue which caused incorrect
readings and thus higher noise. It was resolved as I recall and noise
level fell back to expected.
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