UmTRX preselector frontend updae

Alexander Chemeris alexander.chemeris at gmail.com
Sat Aug 25 11:43:31 UTC 2012


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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