[time-nuts] Divider circuit for Rubidium Standard

[xaos]

Bob,

This are all great questions.

1. Let's assume that it varies from a HP Signal generator
to a home built device. However, If I was to build it I
would expect to pay more and get better specs.
I have a few HP 3325B's and a few 8660C.
I would probably use those as inputs but not always.

2. Let's stick with the basics: 5-10Mhz.

3. Again, basics: 1-7V peak to Peak.

4. Ok, this is the real important question.
The answer is, an amplifier of some sort.
And that amp will probably feed something
like a Test Instrument or some circuit I
am building. What are my options?

For now, I'd like to simulate some of my simple
designs as well as some designs suggested here.
Then, see where it goes.

George


On 05/22/2015 05:31 PM, Bob Camp wrote:
> 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=- 		 	   		  
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