[time-nuts] Good clean-up oscillators

Mon Feb 4 12:08:31 UTC 2019

Hi Magnus

The loop filter frequency of the AXPLO10 design can be set below 1 Hz (in the range of 200~300 mHz).
If the reference is not terribly poor, only the phase noise for offsets below 2 Hz is affected. Assuming
a reference input with -90 dBc/Hz @ 1 Hz and -120 dBc/Hz @ 10 Hz we achieve the following clean-up
performance:

(1) AXPLO10 "Standard performance" - Free running -105 dBc/Hz @ 1 Hz and -135 dBc/Hz @ 10 Hz -> Locked <-102 dBc/Hz @ 1 Hz
(2) AXPLO10 "ULN option"                     - Free running -110 dBc/Hz @ 1 Hz and -140 dBc/Hz @ 10 Hz -> Locked <-107 dBc/Hz @ 1 Hz

For a poor reference with -80 dBc/Hz @ 1 Hz and -110 dBc/Hz @ 10 Hz the ULN, model would still achieve <-100 dBc/Hz @ 1 Hz.

BTW: We do have other clean-up OCXO with better performance, but their price is beyond the budget which most of the time-nut would be ready to spend.
To give a flavor what we can achieve with one of our best models, I am attaching a phase noise plot.
Best regards
Bernd 

-----Ursprüngliche Nachricht-----
Von: time-nuts [mailto:time-nuts-bounces at lists.febo.com] Im Auftrag von Magnus Danielson
Gesendet: Samstag, 26. Januar 2019 00:37
An: time-nuts at lists.febo.com
Betreff: Re: [time-nuts] Good clean-up oscillators

Hi Bernd,

Thanks for the pointer, it may become handy.

Just out of curiosity, what kind of phase noise would it typically have and what PLL bandwidth?

I see (and already kind of knew) that you have some good oscillators, when it comes to phase-noise, but not too much is disclosed about the PLL module. I know the milage will vary with the reference signal, so hence the PLL bandwidth question.

Cheers,
Magnus

On 2019-01-25 19:41, Bernd Neubig wrote:
> Hi all,
>
> Sorry the URL given below was broken into two lines. In its total it 
> must read 
> https://www.axtal.com/English/Products/OscillatorModules/PhaseLockedOs
> cillat
> orModules/
>
> To download the data sheet directly, use this link:
> https://www.axtal.com/cms/docs/doc87559.pdf
>
> Have fun
> Bernd
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: time-nuts [mailto:time-nuts-bounces at lists.febo.com] Im Auftrag 
> von Bernd Neubig
> Gesendet: Freitag, 25. Januar 2019 07:45
> An: 'Discussion of precise time and frequency measurement'
> <time-nuts at lists.febo.com>
> Betreff: Re: [time-nuts] Good clean-up oscillators
>
>>> At least one version is available from Mouser for $85.
>>>
>>> And I'm sure if I wanted to order one with something slightly 
>>> different, Vectron would do it.>
> >From my previous experience (asking for a custom frequency TCXO)
>> Vectron's
> business model does not include low volume or one offs. Even if they 
> did, they would charge NRE. Now, if you want to buy 10,000 of them, 
> that is a different story.
>
>> Connor Winfield has been much more flexible to me at least, with 
>> volumes in
> the 50s being reasonably priced and willing to make them. They don't 
> have the highest performance parts though.
>
>> Wenzel was very responsive, they could not tell me the proprietary 
>> customer
> specs, but provided specs for a similar part and told me a little 
> about what I had. Their new stuff is pretty expensive.
>
>> That's the limit of my experience.
>
> Hi,
>
> I am hesitating to drop the below  information, as it may be 
> considered as commercial.
> However several models from several companies have been mentioned in 
> this thread, so I would just like to complete the lsiting.
>
> I just want to point out, that AXTAL has a neat compact clean-up OCXO, 
> model AXPLO10.
> You can find it at the AXTAL website under 
> https://www.axtal.com/English/Products/OscillatorModules/PhaseLockedOs
> cillat
> orModules/
> It is sold in small quantities from 1 piece and is reasonably priced 
> and has a lead time of 5-6 weeks.
>
> Best regards
> Bernd
>
>
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: time-nuts [mailto:time-nuts-bounces at lists.febo.com] Im Auftrag 
> von Mark Goldberg
> Gesendet: Donnerstag, 24. Januar 2019 23:16
> An: Discussion of precise time and frequency measurement 
> <time-nuts at lists.febo.com>
> Betreff: Re: [time-nuts] Good clean-up oscillators
>
> On Thu, Jan 24, 2019 at 2:01 PM jimlux <jimlux at earthlink.net> wrote:
>
>> At least one version is available from Mouser for $85.
>>
>> And I'm sure if I wanted to order one with something slightly 
>> different, Vectron would do it.
>>
>>
>>
>  From my previous experience (asking for a custom frequency TCXO) 
> Vectron's business model does not include low volume or one offs. Even 
> if they did, they would charge NRE. Now, if you want to buy 10,000 of 
> them, that is a different story.
>
> Connor Winfield has been much more flexible to me at least, with 
> volumes in the 50s being reasonably priced and willing to make them. 
> They don't have the highest performance parts though.
>
> Wenzel was very responsive, they could not tell me the proprietary 
> customer specs, but provided specs for a similar part and told me a 
> little about what I had. Their new stuff is pretty expensive.
>
> That's the limit of my experience.
>
> Regards,
>
> Mark
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