Dear list members - being a proud owner of a LRPO-101 as well as a HP 105B and a TRACOR 527E Frequency Difference meter, I decided to compare these two oscillators with each other after some days of running them. The attached plot (if this won't work, you can find it here online: http://fafner.dyndns.org/~ulmann/30_nov_2010_tracor_small.jpg) shows the output of the TRACOR 527E (frequency difference, sensitivity set to 10**11 - this corresponds to a multiplication factor of 10**4 regarding the frequency difference) plotted with an old thermal plotter - this is just a qualitative plot but the amplitude difference between the minimum and maximum peaks corresponds to about +/- 1 parts in 10^-11. I would like to hear your opinion about this - does this look reasonable to you? The inputs to the TRACOR were the 10 MHz output of the LPRO and the 1 MHz output of the HP 105B - both oscillators were running for a little bit more than three days without interruption. All the best - Bernd. :-)
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