UmTRX preselector frontend updae

Alexander Chemeris alexander.chemeris at gmail.com
Sat Aug 25 11:24:26 UTC 2012


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




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