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.comHi Robin! List of changes not yet ready (soon). And thank you for your help in English :) Best regards, Andrey Sviyazov. 2012/5/29 Robin Coxe <coxe at close-haul.com> > Hi Andrey. Nice work. Is there is big list of all of the changes > that have been incorporated into the new design? This change record > would be very helpful. > > A minor English language note to avoid unintentional bad puns-- you > might not want to have a filename with "ass" in it. Perhaps just > spell out "assembly"? ;) > > -Robin > > On Mon, May 28, 2012 at 10:13 PM, Andrey Sviyazov > <andreysviyaz at gmail.com> wrote: > > Hi all. > > > > Sorry Robin and Sylvain, I did not check CC first time. > > Here project files and my small explanation for you. > > > > 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 > > > > > > > > -- > Robin Coxe | Close-Haul Communications, Inc. | Boston, MA > +1-617-470-8825 > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120529/ee081121/attachment.htm>