Hi, On 02/26/2018 08:42 PM, Gerhard Hoffmann wrote: > Am 26.02.2018 um 20:20 schrieb Tom Van Baak: >> Fun fact -- there's a wide spur at ~2 Hz on the 5065A phase noise >> plot. What do you think that is? On a hunch I opened the front panel >> and reset the blinking amber battery alarm lamp, and voila, that noise >> went away. Makes sense when you think of the power variations >> associated with a blinking incandescent lamp. > > There was a Tektronix sampler that had a few ps sampling jitter to the tune > of a blinking LED on the mainframeĀ :-)
I was just about to comment on that. The Tek 11803 / CSA803C TDR module has a blinking LED with "HOT" TDR pulse. It however skews the timing so a later firmware disabled the blinking. Sadly to say, I don't have that FW on mine CSAs Cheers, Magnus _______________________________________________ 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.