Poul-Henning Kamp skrev: > In message <[email protected]>, John Ackermann N8UR writes: >> Sure. I didn't write down the numbers because it was an interim step, >> but I earlier did that and IIRC the std dev was around 20-25 ps. >> >> Would error in the cal circuit tend to falsely increase, or decrease, >> the result? Or both? > > In my experience it generally skews your result downwards, but I have > seen it move upwards also, it all depends on the phase.
I have seen how it skews both ways. With a very sensitive hand a minimum can be found which can be fairly low, such as 13 ps but then I had tuned the 200 MHz section carefully. Getting such low results on a general signal is not possible. Also, the ref out of the HP5370 has a wideband 5 MHz signal with overtones noise which can be removed if modified. Modifications requires one little short-out. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
