If your scope probe is 1:1 (or set to 1:1 if it has a switch), be aware that most 1:1 scope probes have high capacitance and not much bandwidth. I have as number of 100MHz Tektronix scope probes (in the 10:1 setting) that have a specified bandwidth of 6 MHz in the 1:1 setting. That would definitely make you square wave look like a sine wave.
Didier KO4BB On April 20, 2014 2:59:44 AM CDT, [email protected] wrote: > > >Claude, > >your output is a square wave on 50 Ohm as write close the connector. >Use >this filter to have a clean sinewave output. > >http://www.timeok.it/files/5_and_10mhz_low_pass_notch_filter.pdf > >Luciano > >www.timeok.it > >On Thu 17/04/14 7:32 AM , Claude Fender wrote:Hello List, > I've recently bought a Quartzlock 10A R (rubidium). Does anyone has >experience with this unit? > > My > unit has two outputs with no options. The problem is the shape of the > waveform (see attachments), it's the same shape for the two outputs. > When I > connect an output directly to the oscilloscope, the shape is nearly > "squared" and when I use a probe, the shape is nearly "sine" ! > >When I send a 10 MHz signal from a generator, the waveform is a clean >sine >with or whithout the probe. > >So what signal should I except from this rubidium ? Or most probably, >what >is wrong with my use of the oscilloscope ? >(The frequency is ok by the way (+2E-10) and I didn't open the case >yet) > > Thanks for any advice > > Claude > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1] > and follow the instructions there. > >------------------------- >Message sent via Atmail Open - http://atmail.org/ > >Links: >------ >[1] >http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >_______________________________________________ >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. -- Sent from my Nexus 7 tablet. _______________________________________________ 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.
