The Tektronix TM509/5009 (and I think the 5010) counter modules have a National Semiconductor noise generator chip in them. It injects noise into the counter to get around counter oscillator/input frequency synchronization. I was once given a TM509 with a bad noise generator chip... Some Very Smart People spent ages thinking the problem was in the device they were working on until they tried a different counter. The Very Smart People (too smart to RTFM) could never figure out why the counter was flakey and finally tossed it. A little dumpster diving a few minutes with a scope yielded a very nice little counter.
---------------------------- > Universal timer/counters and equivalent time sampling DSOs can have this problem when their timebase ends up synchronized with the signal they are measuring. _______________________________________________ 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.
