[time-nuts] Interesting 1-60 MHz =/- 50 ppb Stratum-3 TCXO chip

[jimlux]

On 5/1/20 5:00 PM, Richard Solomon wrote:
> Where do you buy these ? Their web site was not too illuminating.
> 


digikey and mouser carry a lot of SiTime parts, including eval boards.


> Tnx, Dick, W1KSZ
> 
> On Fri, May 1, 2020, 4:31 PM mpb45 at clanbaker.org <mpb45 at clanbaker.org>
> wrote:
> 
>> Hello, time Nutters--
>>
>> I have been phase locking the freq counters in my HP 6-GHz VNA, Tektronix
>> spectrum analyzer and bench freq counter to the 10 MHz signal from
>> a Trimble Thunderbolt via a 4-port distribution box and long coax cables
>> to each of the instruments.  This works well but is a pain in the tush
>> connecting to long coax cables when the bench test gear are moved around.
>>
>> A friend suggested looking into some MEMS TCXO's made by SiTime to
>> do this with.   SiTime offers a wide variety of Stratum-3 TCXO chips.  One
>> of them is the SiT5358 which is spec'd at 0.05 ppm from 1 to 60 MHz.
>>
>> https://www.sitime.com/products/super-tcxos/sit5358
>>
>> I am wondering what any feedback thoughts might be on this from
>> the Time-Nuts gang?  An eval-PCB board for the SiT5358 chip is
>> available.  What say the Time-Nutters gang about this approach for
>> incorporating a small SiT5358 eval-PCB board into my bench test
>> gear for phase locking to?  I am also wondering which of the
>> SuperStratum3 TCXO chips might be the best choice for a project
>> like this?
>>
>> Any feedback on this is most welcome!
>>
>> Mike Baker
>> Gainesville/Micanopy, Florida
>> *****************
>>
>>
>>
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