UmTRX preselector frontend updae

Andrey Sviyazov andreysviyaz at gmail.com
Sat Aug 25 14:10:06 UTC 2012


I hope screening is not really required.
Anyway, you need only connectors labels if all covered by screen.

Best regards,
Andrey Sviyazov.
(Sent from my mobile client)
25.08.2012 15:43 пользователь "Alexander Chemeris" <
alexander.chemeris at gmail.com> написал:

> And one question from me - wouldn't it be better to move "CH1" and
> "CH2" label to outside of the boxes? If we decide to put actual EMI
> shields, labels will be hidden.
>
> On Sat, Aug 25, 2012 at 3:24 PM, Alexander Chemeris
> <alexander.chemeris at gmail.com> wrote:
> > I've discarded those e-mails because of their size and instead I've
> > checked in those files into the git:
> > https://github.com/chemeris/umtrx-schematics
> >
> > Your comments are welcome.
> >
> > On Fri, Aug 24, 2012 at 10:12 PM, Andrey Sviyazov
> > <andreysviyaz at gmail.com> wrote:
> >> Here zip with PCB and Gerbers.
> >> That's all folks ;)
> >>
> >>
> >> Best regards,
> >> Andrey Sviyazov.
> >>
> >>
> >>
> >> 2012/8/24 Andrey Sviyazov <andreysviyaz at gmail.com>
> >>>
> >>> Hi all.
> >>>
> >>> Here zip with all project files include PDF and BOM for GSM900 assembly
> >>> variant.
> >>> PCB and Gerber will be in the next letter.
> >>>
> >>> Best regards,
> >>> Andrey Sviyazov.
> >>>
> >>>
> >>>
> >>> 2012/8/24 Andrey Sviyazov <andreysviyaz at gmail.com>
> >>>>
> >>>> I think to use 550mhz in case of 360 mhz IF.
> >>>> So image will be around 190 mhz, but here also there are very strong
> TV
> >>>> and trank radios.
> >>>>
> >>>> Best regards,
> >>>> Andrey Sviyazov.
> >>>> (Sent from my mobile client)
> >>>>
> >>>> 24.08.2012 18:08 пользователь "Sylvain Munaut" <246tnt at gmail.com>
> >>>> написал:
> >>>>
> >>>>> BTW,
> >>>>>
> >>>>> Are you using upper or lower image ?
> >>>>>
> >>>>> Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz
> >>>>> right ?
> >>>>>
> >>>>> With 1.3 GHz you will get images from 1.7 GHz
> >>>>> With 500 MHz you  will get images from 100 MHz (FM Radio !!!)
> >>>>>
> >>>>> Cheers,
> >>>>>
> >>>>>     Sylvain
> >>>
> >>>
> >>
> >
> >
> >
> > --
> > 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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