[time-nuts] Divider circuit for Rubidium Standard

[Bob Camp]

Hi

What is your objective? Put another way:

1)  How clean is your sine wave source? 
2) What frequency (or range) are you trying to convert?
3) What level range are you trying to work with?
4) What is it going into (how clean is the next stage)?

If you have an optical fountain that is good to 1x10^-15 at 1 second, and
you are trying to map Pluto with a radar in your back yard, the answer will
be a bit different than if you are starting with a surplus OCXO and trying 
to drive a 5334 :)

Bob

> On May 22, 2015, at 4:27 PM, xaos <xaos at darksmile.net> wrote:
> 
> After reading the posts on this subject I have a question.
> First, in my experience I used a rather simple circuit made from
> diodes used as limiters and a transistor feeding
> a logic inverter. No AGC.
> 
> So here is my question. What is the proper circuit to use?
> I'd like to do a PSPICE and check things out followed by
> a prototype.
> 
> I got that a comparator is out, etc.
> 
> Cheers,
> George H. N2FGX
> 
> On 04/26/2015 06:51 AM, Bryan _ wrote:
>> All:
>> 
>> Picked up a FE 5680B from Ebay awhile back. Appears to work fine, but is limited to a 1pps output. However there is a point on the PCB that's documented that has a 20Mhz output. There is actually a clean 60Mhz output as well.
>> 
>> http://www.ebay.com/itm/FEI-fe-5680b-rubidium-oscillator-With-1pps-20mhz-output-ONLY-10mhz-NEED-to-MOD-/291419889143?pt=LH_DefaultDomain_0&hash=item43d9fa9df7
>> 
>> I would like to tap this 20mhz output and feed it to a divider/buffer circuit for a 10Mhz output at 50ohm. Can anyone recommend a good schematic for such a purpose. I was looking at the project from David partridges web site http://www.perdrix.co.uk/FrequencyDivider/index.html
>> 
>> Cheers and thanks in advance.
>> 
>> -=Bryan=- 		 	   		  
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.