UmTRX January 2013

umtrx@lists.osmocom.org

5 participants
4 discussions

Dual-channel support on UmTRX
by Alexander Chemeris 03 Feb '13

03 Feb '13

Hi all, Just to let everyone know - in addition to working on manufacturing issues we're improving our UmTRX firmware and software support right now. And today we've got dual-channel finally working. Thanks to Andrew Karpenkov for his awesome work on implementing the second channel support in FPGA! I plan to push the pre-built FPGA image to the download area in the during the weekend and Andrew will publish the FPGA code changes soon too. What's ahead of us is to teach OpenBTS to use the second channel of UmTRX. This includes support of two independent channels and then implementation of switched diversity receive. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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UmTRX/LMS6002D specific GUI for GnuRadio
by Alexander Chemeris 28 Jan '13

28 Jan '13

Hi all, For the purpose of tuning our Rx performance I've started putting together an UmTRX specific GUI for GnuRadio. Source code is published on github and will be gradually developed there. As usual, patches and improvements are welcome: https://github.com/chemeris/umtrx_scripts GUI === GUI code is located at 'gui' directory. At this moment it is very basic and has FFT, waterfall and scope views together with a minimal set of controls for the Rx side of LMS6002D. Type './umtrx_fft.py --help' to get a list of command-line options. Note, that you have to select Rx channel from the command line. If you want to run an LMS control GUI without spectrum display you could run './lms_ctrl_panel.py' from 'python_lib' directory. Screenshots are attached: umtrx_fft.png - FFT view (default) umtrx_fft_waterfall.png - Waterfall view umtrx_ctrl_panel.png Library ===== Our Python library is under the 'python_lib' directory. It consists of three parts: * umtrx_ctrl.py - Base library which defines primitives for LMS SPI control and UmTRX network discovery. It is pretty well abstracted, so you cuold replace it with your own implementation if you want to talk to some other board with LMS6002D chip, e.g. MyriadRF. * umtrx_lms.py - library which implements all our LMS control logic. * lms_ctrl_panel.py - implementation of the LMS control panel. Also could be used as a standalone control app for LMS. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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Building firmware
by stephane＠shimaore.net 22 Jan '13

22 Jan '13

Hi, While I'm waiting for my umtrx to show up, I'm following the "let's play newbie" route and trying to use the instructions on https://code.google.com/p/umtrx/wiki/BuildingUHD I got stuck for a short while on step #2. It would probably be useful to add at the beginning of step 2 something like: git clone git://github.com/chemeris/UHD-Fairwaves.git Also I see the FPGA instructions use ISE 14.2, should I download that version rather than the more recent one (14.4) on Xilinx' site? Finally, is the Ethernet flashing going to work off-the-box on the beta umtrx or is it better I buy a JTAG cable? In that later case is the Digilent HS-1 the recommended cable? S.

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Re: UmTRX housing
by Andrey Sviyazov 19 Jan '13

19 Jan '13

Hi all. Sorry, I confused thread, so I repeat it here. How about this housing<https://www.elfa.se/elfa3~eu_en/elfa/init.do?item=50-561-49&toc=0&q=431621> for lab users ? It looks good and can easy dissipate power from UmTRX + UmSEL. Also I like housing from Tecnoal comp <http://www.tecnoal.it/>. On my experience quality stable and price is not expensive. For indoor BTS 1 W we can use some of this<http://www.tecnoal.it/heatsinks-c-profiles-series_ctg1_5_eng_2.asp>, for example C180 <http://www.tecnoal.it/cgi-bin/pdf_disegno/C180.pdf>. For BTS 2x10 W no idea except own design of extruded heatsink. Housing assembly should meet IP65 (waterproof) requirements. Best regards, Andrey Sviyazov.

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UmTRX January 2013