This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/UmTRX@lists.osmocom.org/.
Andrey Sviyazov andreysviyaz at gmail.comHere 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 >>> >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120529/f70533ef/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: PDF_out.zip Type: application/zip Size: 1721988 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120529/f70533ef/attachment.zip>