Pletronics OHM4

Andrey Sviyazov andreysviyaz at gmail.com
Fri Aug 3 13:34:02 UTC 2012


Actually, I don't have enough time to research of it more, because of
preselector design in progress.

Best regards,
Andrey Sviyazov.



2012/8/3 Andrey Sviyazov <andreysviyaz at gmail.com>

> 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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