UmTRX v1b coming soon

Andrey Sviyazov andreysviyaz at gmail.com
Tue May 29 02:07:35 UTC 2012


Here PDF's

Best regards,
Andrey Sviyazov.



2012/5/29 Andrey Sviyazov <andreysviyaz at gmail.com>

> Here PCB file of project.
>
> Best regards,
> Andrey Sviyazov.
>
>
>
> 2012/5/29 Andrey Sviyazov <andreysviyaz at gmail.com>
>
>> Hi all.
>>
>> First release of UmTRXv1b seems finished.
>> All suggestions and issues are welcomed, especially prior to production
>> (few days).
>> There are 4 Rx inputs to implement either scan function or software
>> diversity receiving.
>> There are 16pin connector to supply and control external preselector,
>> amplifier, LNA, ATT, diversity switch...
>> This new release have 2U size (100x160mm) that more universal for indoor
>> housing to put together several UmTRX's with PC and power supply modules in
>> one rack.
>> Also possible variant to meet to requirements -40C and it is the only one
>> reason to keep OCVCXO onboard.
>> Also possible variant with external control panel to make easily IP65
>> housing design.
>> Also DC supply voltage can be in range 8..28V to keep single DC supply if
>> UmTRX will combined with IP65 tower mounted amplifiers.
>>
>> And so on depend of your fantasy :)
>>
>> Here included some project files and BOM for variant with 20dBm Tx and
>> onboard control.
>> PCB and PDF files will be in the next two e-mails.
>>
>> Best regards,
>> Andrey Sviyazov.
>>
>>
>>
>> 2012/5/21 Alexander Chemeris <alexander.chemeris at gmail.com>
>>
>>> Andrey,
>>>
>>> On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov <andreysviyaz at gmail.com>
>>> wrote:
>>> > 1) Is it used somewhere? In the datasheet there is probable errors, for
>>> > example, 1PPS is specified as input.
>>>
>>> Use this datasheet, here it's marked as output:
>>> http://www.transystem.com.tw/product/66/EB-570%20Data%20Sheet%20V1.4.pdf
>>> Probably you have an older version of the datasheet.
>>>
>>> > 2) There are inputs Reset and Standby. The first can be left open, and
>>> the
>>> > second is possible need to be connected to to FPGA.
>>>
>>> Yes.
>>>
>>> > 3) There Is RTC_CLK_O we don't need him? And that there may be, 32768?
>>>
>>> Could you route it to a test-point or a 2-pin IDC? I don't think we
>>> need this, but it's better to have an ability to access it.
>>>
>>> > 4) Which of two UART's better to use or are they equivalent? There are
>>> no
>>> > any words in datasheet about it.
>>>
>>> Use TX0/RX0 (pins 13/14), which is default to NMEA - see the datasheet
>>> above.
>>>
>>> > 5) Unfortunately no place for both on PCB and we can use either EB-230
>>> or
>>> > EB-570.
>>>
>>> Then we have to use EB-570.
>>>
>>>
>>> --
>>> Regards,
>>> Alexander Chemeris.
>>> CEO, Fairwaves LLC / ООО УмРадио
>>> http://fairwaves.ru
>>>
>>
>>
>
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