[time-nuts] 10 MHz 'failover' switch?

[Scott McGrath]

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 <w7sls.scott at gmail.com> wrote:

Hi Bob,

Thanks for the quick reply, makes sense.

73
Scott
W7SLS

> On Jul 26, 2018, at 1:13 PM, Bob kb8tq <kb8tq at n1k.org> 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 <w7sls.scott at gmail.com> 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


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