HI Timing resolution of what we’re talking about:
5334 2 ns single shot. http://literature.cdn.keysight.com/litweb/pdf/5952-7900.pdf?id=1000072178:epsg:dow <http://literature.cdn.keysight.com/litweb/pdf/5952-7900.pdf?id=1000072178:epsg:dow> 5335 1 ns single shot http://www.keysight.com/upload/cmc_upload/All/EPSG084786.pdf <http://www.keysight.com/upload/cmc_upload/All/EPSG084786.pdf> 53131 0.5 ns single shot http://www.keysight.com/upload/cmc_upload/All/EPSG084786.pdf <http://www.keysight.com/upload/cmc_upload/All/EPSG084786.pdf> 53132 0.15 ns singla shot (above) 5370 0.02 ns single shot http://literature.cdn.keysight.com/litweb/pdf/05370-90031.pdf?id=713250 <http://literature.cdn.keysight.com/litweb/pdf/05370-90031.pdf?id=713250> TICC 0.05 ns single shot. https://www.febo.com/pages/TICC/ <https://www.febo.com/pages/TICC/> Many of the devices above will do strange (and possibly incorrect) things to generate some extra digits here and there. Most toss up all sorts of extra digits in frequency mode. We have discussed the issues with those extra digits at great length here many times before. Random piece of coax around the shop will have a delay of < 1 us. A 1 ppm timebase on a scope will give you an accuracy of 1 ppm out of 1 us. That would be 1 ps. If you have a scope that will show you better than 1 ps, that’s even faster than what I would call a real fast scope. Bob On May 8, 2017, at 12:48 AM, Jerry Hancock <je...@hanler.com> wrote: > > I tried reading the 5335 over GPIB. In the case where I am measuring > frequency I get the expected number of digits. In the case where I am > measuring A->B, I only get nanoseconds (e.g 3E-9; or 4E-9). On my scopes, I > was able to measure the delta at 3.28 nanoseconds with both scopes close > within .01 nanoseconds. I was measuring the delta between 1M and 11.5” of > RG316 cable. With a published velocity factor of .695 and 3.28E-9 seconds > difference, the delta came out to 27” vs the measured 27.87”. Of course the > RG316 VF wasn’t accurate to the number of digits needed to get any closer. I > was demonstrating the precision of the equipment I was using to my son who is > becoming somewhat of a mad scientist like his father. > > >> On May 7, 2017, at 8:15 PM, Hal Murray <hmur...@megapathdsl.net> wrote: >> >> >> je...@hanler.com said: >>> I thought I had seen somewhere where people were getting higher resolution >>> using software along with the 5335, no? >> >> I don't know about the 5335, but if you talk to a 5334 via GPIB, you can get >> more digits than fit on the display. >> >> >> -- >> These are my opinions. I hate spam. >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
