> Le 19 nov. 2014 à 09:47, Anders Wallin <anders.e.e.wal...@gmail.com> a écrit : > > Hi all, > > I have a 53230A that behaves differently on ch1 and ch2. > > With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and > shows e.g. a pusle-width measurement etc. > The same signal connected to ch1 fails to trigger.
Hi Anders, Are you sure you set the level to +1V…. That got me once. ;-) > > I noticed the Vpp and Vmax/Vmin voltage readings are not correct for PPS > signals - i.e. on a scope my signals are from 0V to 4V, but the counter > shows -5 mV to +5 mV or similar. But perhaps that is because of the low > duty-cycle of a PPS signal. Mine shows the same and I assumed that this is the case, though I haven’t delved further. > > We were measuring RF frequencies with the counter a few weeks back - it > says max 1W input... it is possible that this was exceeded (does 50Ohm vs. > 1MOhm setting matter for input-protection?). > Any ideas on what breaks first on the input stage? :) (are there schematics > online?) > > > thanks, > Anders > _______________________________________________ > 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.
