UmTRX December 2012

umtrx@lists.osmocom.org

6 participants
4 discussions

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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UmTRX beta aka Limited Edition sales start!
by Alexander Chemeris 15 Dec '12

15 Dec '12

Dear all, We want to make a Christmas gift for the community and it's my pleasure to announce the start of sales of UmTRXv2 beta samples aka Limited Edition. What is UmTRX? ============== UmTRX is an SDR transceiver, which we, Fairwaves, developed specifically for OpenBTS. It's similar to USRPs, but is heavily modified to be the best hardware for OpenBTS. More details are available at the project web-site: https://code.google.com/p/umtrx/ Ordering and Shipping ===================== To claim your UmTRXv2 Limited Edition, please fill in this form: https://docs.google.com/spreadsheet/viewform?formkey=dGVHNlNDaXVoSHp2eC1EcV… You will receive a payment link shortly after we receive your answer. The shipping cost will be estimated when we have everything ready for shipping, we'll contact you again by then. There are only 14 units in this Limited Edition batch, so we allow you to claim only 1 or 2 units. The base price for a UmTRX is $1500 just as we promised. Since we are relying on your support to fund further development, we encourage you to donate an additional amount. You donations are critical for us to produce the best ever hardware for OpenBTS. The 5 highest pledgers will become the proud owners of UmTRX Serial Numbers 1 through 5 and will be recognized on the UmTRX project site. Shipping will be from Paris, France with FedEx or some other express carrier. We plan to ship as soon as we receive orders for all 14 units, so the shipping date is not fixed yet. We'll contact you when we fix it. What does "beta" mean? ====================== Hardware is fully functional, as far as we could tell. There may be further improvements in quality, but in its current form it works smoothly for laboratory testing. Software is what makes it "beta": * Only 1st channel is supported in the software at this moment. * Not all LMS6002D controls are properly integrated into the software. * Safe/production bitstreams switching is not working in the FPGA yet. * Result of the TCXO frequency synchronization from GPS is not stored to EEPROM. * I/Q imbalance and DC leakage calibration are not automatic. We accept patches to fix these and other issues. You participation will make the stable release closer. ;) The software is based on UHD from Etttus Research, so if you're familiar with it, it'll be easy for you to get into. UmTRXv2 package contents ======================== * UmTRXv2, flashed and ready to use. * Power supply, 12V/30W - http://www.phihong.com/assets/pdf/PSAC30U.pdf Note, that it comes without a 220V power cord. Make sure to prepare one before you receive the UmTRX to be able to power it on immediately. ;) * Converter cable from a Molex power connector to a standard round DC connector. * U.FL-to-SMA-F pigtail cables * Two small antennas - one for Tx and one for Rx. * An Open-Source Telecom T-shirt! (see the picture attached) Feedback ======= Do not hesitate to contact us if you have any questions, suggestion or comment. We love your feedback! -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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Burst start/end phase error
by Thomas Tsou 14 Dec '12

14 Dec '12

Hi Alexander, Please try the last commit at git://github.com/ttsou/openbts-p2.8.git laurent I tested with 4 samples per symbol as we did in the past. Reducing the start/end phase error involved adding bits so that there is no partial phase transition to/from nothing. We then zero out the excess bits with a simple power mask. Thomas

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Re: Open-source telecom t-shirts
by Alexander Chemeris 03 Dec '12

03 Dec '12

(forwarding to the UmTRX mailing list) On Fri, Oct 19, 2012 at 7:33 PM, Ivan Kluchnikov <Ivan.Kluchnikov(a)fairwaves.ru> wrote: > Just sketch :) Nice idea. The last symbol would be better to have in the form of a SIM-card, imho. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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UmTRX December 2012