Hi If you are feeding a frequency counter with the “10 MHz + spur” signal, it can indeed mess up the modern computing counters.
Bob > On Jul 27, 2018, at 12:38 PM, Scott McGrath <[email protected]> wrote: > > Since this is time nuts ADEV is sacred, > > but the question is the use case. > > Are we looking at a time nuts level frequency distribution network. Or are we > trying to lock benchtop instruments with poor internal standards to a common > ‘Good’ reference. > > If the former it can be done but will require a fair amount of design work as > well as some EMC > Modeling of the system to ensure no feed through of unwanted signals and/or > modulation or beat products > > If the latter simple detection and switching will be sufficient but dual > switch much better. > > Content by Scott > Typos by Siri > > On Jul 26, 2018, at 4:59 PM, W7SLS <[email protected]> wrote: > > Hi Bob, > > Thanks for the quick reply, makes sense. > > 73 > Scott > W7SLS > >> On Jul 26, 2018, at 1:13 PM, Bob kb8tq <[email protected]> wrote: >> >> Hi >> >> They are a pretty rare item. A more common approach is a disciplined >> oscillator that >> will do failover on it’s inputs. That’s still a rare item, but at least a >> possible thing to find. >> The equally big problem will be getting doc’s on one if you do find it…. >> >> Bob >> >>> On Jul 26, 2018, at 2:45 PM, W7SLS <[email protected]> wrote: >>> >>> Hello, >>> >>> Looking for recommendation for a ‘failover’ or ‘redundant’ switch for 10 >>> MHz distribution. >>> >>> Not really sure of the correct term. >>> Something that sensed RF on primary 10 MHz, and then switched to >>> secondary on fail of primary. >>> >>> A brief search showed several very nice $$$ items, suitable for commercial >>> applications, >>> but I wonder if there are some “last year’s” (but not last century) >>> versions that would work for a home lab. >>> >>> Context: >>> >>> I have a GPSDO and a Rb source of 10 MHz. >>> The power supply on the GPSDO failed (worked enough to light up the GPSDO, >>> but not enough to lock). >>> I have a new power supply on order, but would be nice to have “insurance”. >>> >>> Thanks in advance for the group bandwidth. >>> >>> Scott >>> W7SLS > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
