Pletronics OHM4

Andrey Sviyazov andreysviyaz at gmail.com
Fri Aug 3 13:29:13 UTC 2012


1/ Yes, my fears were confirmed - OHM4 footprint isn't correct (my
mistake), but it possible to mount from bottom side.
2/ Noise plots are similar, I think we see limit of LMS performance but not
XO (see pictures here).

Also, I found that for 1850MHz better to use Icp=1.2mA.
Therefore I decide to measure at 1.2mA for both frequencies just to compare.
If Icp dependance of frequency confirmed, then we need lookup table for
this also.

Best regards,
Andrey Sviyazov.



2012/8/3 Alexander Chemeris <alexander.chemeris at gmail.com>

> So, looks like it has a bit worse far-end noise, but otherwise is
> about the same as TCXO we use now, correct?
>
> Btw, was it UmTRX layout incorrect or the OCXO pinout?
>
> On Fri, Aug 3, 2012 at 3:42 PM, Andrey Sviyazov <andreysviyaz at gmail.com>
> wrote:
> > Hi.
> >
> > Here LMS TxLO noise plot for OHM4048V-26MHz OCXO.
> >
> > Best regards,
> > Andrey Sviyazov.
> >
> >
> >
> > 2012/7/31 Andrey Sviyazov <andreysviyaz at gmail.com>
> >>
> >> That's good news!
> >> Yes, of course, I have to test it and then share some results.
> >>
> >> Best regards,
> >> Andrey Sviyazov.
> >>
> >>
> >>
> >> 2012/7/31 Alexander Chemeris <alexander.chemeris at gmail.com>
> >>>
> >>> Hi,
> >>>
> >>> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey Sviyazov
> >>> - could you measure their performance and test UmTRX with them?
> >>>
> >>> --
> >>> Regards,
> >>> Alexander Chemeris.
> >>> CEO, Fairwaves LLC / ООО УмРадио
> >>> http://fairwaves.ru
> >>>
> >>
> >
>
>
>
> --
> Regards,
> Alexander Chemeris.
> CEO, Fairwaves LLC / ООО УмРадио
> http://fairwaves.ru
>
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