[time-nuts] connor winfield GPSDO module phase noise

Jim Lux jimlux at earthlink.net
Sat Feb 22 18:34:52 UTC 2014


On 2/22/14 10:01 AM, Said Jackson wrote:
> Jim,
>
> Check the archives, I am pretty sure I reported on one of them, I think it was on the FTS-250.. Or FTS-125.
>

Found it.. thanks.. the key was to put your name in the search


> My recollection: Not that bad for the price, but phase noise and spurs on my sample unit were significantly worse than what they show in their plots no matter what I tried, and quite large phase/frequency jumps when disconnecting/re-aquiring GPS.
>
> Drawbacks of NCOs versus GPSDOs I guess.
>
> Bye,
> Said
>
> Sent From iPhone
>
> On Feb 22, 2014, at 5:33, Jim Lux <jimlux at earthlink.net> wrote:
>
>> I ran across these units
>> http://www.conwin.com/time-frequency_references-gps_disciplined-gps_references.html
>>
>> and I found some references from a few years ago in the time-nuts archives, but I can't find any data on phase noise, etc. for the disciplined output.
>>
>> The data sheet/user manual/etc just say "NCO", but there's no specs on the performance.
>>
>> Has anyone measured one of these?
>>
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