UmTRX preselector frontend updae

Alexander Chemeris alexander.chemeris at
Fri Aug 24 12:13:55 UTC 2012

On Fri, Aug 24, 2012 at 12:34 PM, Jean-Samuel Najnudel - BJT PARTNERS
SARL <jsn at> wrote:
> Hi Alexander,
> As far as I understand, the IF frequency should be 360 MHz as the UmSEL uses
> the TB0130A IF SAW filter. Its center frequency is 360 MHz.

Ok, thanks.

> By the way, why do you say it would be a problem if IF was above 380 MHz ?
> Because of interferences ? In this case, would it still be problem if we
> install the UmTRX + UmSEL boards inside an enclosure ?

Well, the original question was from Harald, but the concern was with
interference, yes.

I think it depends on the type of enclosure we use. Andrey should be
able to comment here.

Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио

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