[time-nuts] trimble Thunderbolt, how to get 25 or 27 mHz from it??
Bob kb8tq
kb8tq at n1k.org
Mon Jan 8 19:29:44 UTC 2018
Hi
Depending on the noise floor of the phase detector (which probably is not super
duper), even the noise *inside* the PLL bandwidth may not be all that great.
Bob
> On Jan 8, 2018, at 2:23 PM, Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
>
> Yes, but the PN noise (outside the PLL bandwidth) will be much higher than with a classical multiplier.
>
> Bruce
>
>>
>> On 09 January 2018 at 02:14 Chris Wilson <chris at chriswilson.tv> wrote:
>>
>> Hello Bruce, Sorry, this went to you direct as well, in error.
>>
>> Thanks for the very fast reply! Would it be possible to use one of
>> these frequency multiplier IC's? Sounds simpler, but maybe there are
>> down sides?
>>
>> http://uk.farnell.com/on-semiconductor/nb3n502dg/pll-clock-multiplier-8soic/dp/2101849
>>
>> on 08/01/2018 13:11 you wrote:
>>
>>>>
>>> Divide the 10MHz by 2 and use a filter to extract the fifth
>>> harmonic from the 5MHz square wave output.
>>>
>>> Amplify the 25MHz output from the filter if required...
>>>
>>> Bruce
>>>
>>> On 09 January 2018 at 00:31 Chris Wilson <chris at chriswilson.tv> wrote:
>>>
>>> 08/01/2018 11:28
>>>
>>> Is there an easy way to get 25 or 27 MHz from my Trimble Thunderbolt
>>> as a reference clock at 1v P to P square wave for a Si5351a
>>> synthesizer chip please? I have the David Partridge divider board from
>>> way back that is still going strong, but 25 MHz is not an option as it
>>> divides only. Thanks, please keep replies to the level an idiot might
>>> comprehend :)
>>>
>>> --
>>> Best Regards,
>>> Chris Wilson.
>>> mailto: chris at chriswilson.tv
>>>
>>>>
>> --
>> Best Regards,
>> Chris Wilson.
>>
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