UmSELv1 - back from the fab

Andrey Sviyazov andreysviyaz at gmail.com
Mon Mar 18 16:30:14 UTC 2013


Oh, pics here.

Best regards,
Andrey Sviyazov.


2013/3/18 Andrey Sviyazov <andreysviyaz at gmail.com>

> Hi all.
>
> Here attached pics of UmSELv1 inputs leakage for E-GSM900.
> Measured at MIXER inputs, i.e. it is diversity switches isolation and/or
> between LNA's (PCB).
>
> As for the DCS, my first quick test shows that isolation is not so good
> and around 15dB only.
>
> Best regards,
> Andrey Sviyazov.
>
>
> 2013/3/18 Alexander Chemeris <alexander.chemeris at gmail.com>
>
>> Hi all,
>>
>> We've received UmSEL units from the manufacturing and working on its
>> testing and integration right now. Results are as expected so far,
>> which is a good sign.
>>
>> Attached are pictures of UmSELs and UmSEL on a UmTRX:
>>
>> https://lh6.googleusercontent.com/-mdrwUTthuCE/UUa1PXmXqEI/AAAAAAAAFLY/A6ne42K5jiE/s852/2013-03-17
>>
>> https://lh5.googleusercontent.com/-nC-F9O9NM1U/UUa1j0488SI/AAAAAAAAFLw/rCzvCF4WJjs/s852/2013-03-17
>>
>> LNA gain measurements, made by Andrey Sviyazov are attached here as well.
>>
>> --
>> Regards,
>> Alexander Chemeris.
>> CEO, Fairwaves LLC / ООО УмРадио
>> http://fairwaves.ru
>>
>
>
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