Hi Claude I don't have any specific experience of this unit but suspect your problem may be down to impedance matching. The manual for the Quartzlock A10-M specifies the output impedance as being 50 ohms nominal and it would be reasonable to assume this is the same. Scope inputs and scope probes won't present such a low impedance so the use of a coaxial pass through 50 ohm termination would be my first suggestion, if you haven't got one to hand just try hanging a 50 ohm resistor, anywhere between 47 and 56 ohms say, across the output and ground and monitoring across that. This is quite a common problem, especially on supposedly square wave outputs, so chances are your unit is fine. Regards Nigel GM8PZR In a message dated 17/04/2014 08:17:12 GMT Daylight Time, [email protected] writes:
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 and follow the instructions there. _______________________________________________ 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.
