[time-nuts] Measuring 10 MHz

[Martyn Smith]

Hello,

Thanks to all for your replies and suggesting especially Brooke, Bruce and 
Pete.

I am already using the Stanford technique with the 1 kHz output.  That's how 
I get 2 x 10E-12/sec accuracy.
Using this technique, the accuracy should be 7.9 uHz at 10 MHz (7.9E-13). 
But I don't reliably  achieve this.  I reliably get 20 uHz, sometimes 10 uHz 
and  I do have resolution to parts in 10E-13, but the last digit isn't 
reliable.

Brooke do you do better than me here with this technique?  I see you publish 
results with accuracy better than I can achieve, I was wondering how you do 
it.

I think the answer from Bruce identifies my problem.  I need to take more 
care with my measurement techniques

If it was easy, people wouldn't charge $20 - 50k for a box that dies it 
well.

Thanks all again

Martyn