UmSELv1 - back from the fab

Andrey Sviyazov andreysviyaz at gmail.com
Mon Mar 18 16:29:09 UTC 2013


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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