UmTRX

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189 discussions

Re: T-Shirt
by Aaron deMello 20 Oct '12

20 Oct '12

I think the front of the T-shirt should read "FREE GSM" with the logo of a SIM card with little feet running. The back should have the Fairwaves Logo / URL. "FREE GSM" because it's a pun: free of cost thanks to open source, and free it from the shackles of the evil big black box infrastructure vendors. In terms of color, if a deep dark midnight blue (like Nike's "Obsidian" blue) would be awesome. This is for selfish reasons since all my gym wear is Obsidian blue :-) Oh and some T-shirts in European XXL or American XL would be nice for me. -- Aaron deMello Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Saturday, October 20, 2012 at 4:20 PM, umtrx-request(a)lists.osmocom.org wrote: > Send UmTRX mailing list submissions to > umtrx(a)lists.osmocom.org (mailto:umtrx@lists.osmocom.org) > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.osmocom.org/cgi-bin/mailman/listinfo/umtrx > or, via email, send a message with subject or body 'help' to > umtrx-request(a)lists.osmocom.org (mailto:umtrx-request@lists.osmocom.org) > > You can reach the person managing the list at > umtrx-owner(a)lists.osmocom.org (mailto:umtrx-owner@lists.osmocom.org) > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of UmTRX digest..." > > > Today's Topics: > > 1. Re: Open-source telecom t-shirts (Andrey Sviyazov) > 2. Re: Open-source telecom t-shirts (Andrey Bakhmat) > 3. Re: Open-source telecom t-shirts (Andrey Bakhmat) > 4. Re: Open-source telecom t-shirts (Andrey Sviyazov) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 20 Oct 2012 14:12:48 +0400 > From: Andrey Sviyazov <andreysviyaz(a)gmail.com (mailto:andreysviyaz@gmail.com)> > To: Alexander Chemeris <alexander.chemeris(a)gmail.com (mailto:alexander.chemeris@gmail.com)> > Cc: Sylvain Munaut <246tnt(a)gmail.com (mailto:246tnt@gmail.com)>, umtrx(a)lists.osmocom.org (mailto:umtrx@lists.osmocom.org), Andrey > Bakhmat <Andrey.Bakhmat(a)fairwaves.ru (mailto:Andrey.Bakhmat@fairwaves.ru)>, Mahyuddin Husairi > <mahyuddin(a)gmail.com (mailto:mahyuddin@gmail.com)>, Christian Gagneraud <chris(a)techworks.ie (mailto:chris@techworks.ie)> > Subject: Re: Open-source telecom t-shirts > Message-ID: > <CAE9AREzGtueztHbZ3ak-sA9zAJ-TgBU9Kt6LJSKFJghp5OR7LA(a)mail.gmail.com (mailto:CAE9AREzGtueztHbZ3ak-sA9zAJ-TgBU9Kt6LJSKFJghp5OR7LA@mail.gmail.com)> > Content-Type: text/plain; charset="koi8-r" > > Hmm, I missed it. > But really not sure that Fairwaves will associated to the blue colors (and > vice versa) due to the blue logo. > It doesn't mean that all around must be in blue. > > Best regards, > Andrey Sviyazov. > (Sent from my mobile client) > 20.10.2012 13:43 ???????????? "Alexander Chemeris" < > alexander.chemeris(a)gmail.com (mailto:alexander.chemeris@gmail.com)> ???????: > > > Because blue is the Fairwaves color :) > > > > On Sat, Oct 20, 2012 at 1:42 PM, Andrey Sviyazov <andreysviyaz(a)gmail.com (mailto:andreysviyaz@gmail.com)> > > wrote: > > > And about colors - why blue? > > > On my opinion, dark green and golden contacts looks better. > > > At least blue and gold is not good combination for me. > > > It looks like church painting. > > > > > > Best regards, > > > Andrey Sviyazov. > > > (Sent from my mobile client) > > > > > > 20.10.2012 13:32 ???????????? "Andrey Sviyazov" <andreysviyaz(a)gmail.com (mailto:andreysviyaz@gmail.com)> > > > ???????: > > > > > > > Andrey. > > > > You could add HARDWARE word, to align text with vertical Sim. > > > > > > > > Best regards, > > > > Andrey Sviyazov. > > > > (Sent from my mobile client) > > > > > > > > 20.10.2012 13:01 ???????????? "Andrey Bakhmat" > > > > <Andrey.Bakhmat(a)fairwaves.ru (mailto:Andrey.Bakhmat@fairwaves.ru)> ???????: > > > > > > > > > > I suggest "Unlock communications for the rest of us!" - just another > > > > > option bring to a vote. > > > > > Vertical SIM looks good, but it was difficult for me to arrange it with > > > > > the text. If somebody wants to play with it, I can provide vector (AI) > > > > > files. > > > > > Superman style - good idea, previous versions of T-shirt was slightly > > > > > boring. So I propose make something informal at the back side. > > > > > > > > > > On Sat, Oct 20, 2012 at 1:03 AM, Sylvain Munaut <246tnt(a)gmail.com (mailto:246tnt@gmail.com)> > > wrote: > > > > > > > > > > > > > > I like "Telecom wants to be free" slogan more, but that's just me. > > > > > > > > > > > > > "Telecom Wants to be Open"? > > > > > > > > > > > > I prefer "Telecom wants to be Free" too. (upper case F) > > > > > > > > > > > > and I also prefer the sim to be vertical. > > > > > > > > > > > > > > > > > > Just my 2c > > > > > > > > > > > > Cheers, > > > > > > > > > > > > Sylvain > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > Best regards, > > > > > Andrey Bakhmat > > > > > COO, Fairwaves LLC > > > > > http://fairwaves.ru > > > > > > > > > > > > > > > > > > > > > > -- > > Regards, > > Alexander Chemeris. > > CEO, Fairwaves LLC / ??? ??????? > > http://fairwaves.ru > > > >

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Open-source telecom T-shirts
by Alexander Chemeris 19 Oct '12

19 Oct '12

Hi all, We're thinking about making T-shirts with open-source telecom. I've posted a call for ideas in my OpenBTS blog - please contribute. Telecom needs more openness and you could help us promote this! http://openbts.chemeris.ru/2012/10/reklama-open-source-telecom/ We plan to give them for free to the first 10-20 UmTRX buyers. Then you'll be able to buy them from our web-shop or from one of our friends and distributors. If you proposal gets printed, you'll get a free T-shirt as well. PS If you know a good online T-shirt printing service in US or Europe - drop me a line. I've never done this in US/Europe before. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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LMS6002D support of LTE
by Alexander Chemeris 15 Oct '12

15 Oct '12

Hi Srdjan, We're looking into re-purposing UmTRX for LTE and there a few things which we need to understand better. 1. Is it possible to support 15MHz and 20MHz LTE channel bandwidths? To achieve this we at least need to sample at 23.04Msps and 30.72Msps respectively. LMS6002D datasheet specifies the maximum I/Q samplerate of 14Msps, which is not enough. But at the same time, datasheet claims that ADC and DAC are specified up to 50Msps. How does this fits together? 2. Do you have any experience what maximum output power we could achieve with LMS and proper amplifiers, while still staying in the bounds of the LTE Standard? What would be the limiting factor for the further power increase? 3. Is there any issues using TDD mode in LMS6002D? We've been using onnly FDD mode so far and it would be great to know what issues could we expect when switching to TDD mode. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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FPGA project for UmTRX v2 board
by Andrew Karpenkov 14 Oct '12

14 Oct '12

Hi All, I ported UmTRX project to the new UmTRX v2 board. Now you can compile FPGA project for UmTRX v2 board with "make UmTRXv2" command from fairwaves/umtrx branch. Now, my next goal is to get a working second transmission channel in fpga project. Regards, Andrew Karpenkov

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The need of duplexer in low power operation
by Alexander Chemeris 11 Oct '12

11 Oct '12

Andrey Sviyazov, this question is probably for you, IIRC, both nanoBTS and SysmoBTS have separate antennas for Rx andTx and do not use duplexers. Do we need duplexer for UmTRXv2 if it operates in the low power mode, without an additional PA/LNA? -- Regards, Alexander Chemeris CEO, Fairwaves LLC http://fairwaves.ru

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LPF Bandwidth Tuning with LMS6002
by Gillian Seed 09 Oct '12

09 Oct '12

Hi, I'm having a problem while trying to do a LPF Bandwidth tuning as described in a Programming and Calibration guide page 40, figure 4.5 and on https://github.com/chemeris/UHD-Fairwaves/blob/fairwaves/umtrx/host/utils/u…. Currently it seems to always fail when it's trying to find the VCOCAP value. I'm only getting Low printed before it fails. I was wondering why it takes a 320MHz frequency, because it's not described anywhere in the documents, could I try to do a bandwidth tuning with some other frequency as well? I'm running my code in a following order (http://lists.osmocom.org/pipermail/umtrx/2012-July/000075.html), Example setup for ARFCN 925: Initialization and auto-calibration: ./umtrx_lms.py --lms 1 --lms-init ./umtrx_lms.py --lms 1 --lms-tx-enable 1 ./umtrx_lms.py --lms 1 --lms-rx-enable 1 ./umtrx_lms.py --lms 1 --pll-ref-clock 26e6 --lpf-bandwidth-code 0x0f --lms-auto-calibration RX LNA and RXVGA2 selection and gain control ./umtrx_lms.py --lms 1 --reg 0x75 --data 0xf0 ./umtrx_lms.py --lms 1 --reg 0x65 --data 10 TX LPF control ./umtrx_lms.py --lms 1 --reg 0x34 --data 0x3e LO leakage cancellation (calibration data values may vary) ./umtrx_lms.py --lms 1 --reg 0x42 --data 0x67 ./umtrx_lms.py --lms 1 --reg 0x43 --data 0x89 TX/RX PLL charge pump current ./umtrx_lms.py --lms 1 --reg 0x16 --data 0x93 Tuning ./umtrx_lms.py --lms 1 --lms-rx-pll-tune 925.2e6 ./umtrx_lms.py --lms 1 --lms-tx-pll-tune 880.2e6 TXVGA2 gain to max and enable PA ./umtrx_lms.py --lms 1 --reg 0x45 --data 0xc8 ./umtrx_lms.py --lms 1 --lms-pa-on 2

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ET1011C2 1GbE PHY availability
by Alexander Chemeris 07 Oct '12

07 Oct '12

Andrey, Jean-Samuel, I wanted to check pricing for ET1011C2-CI-DT - 1GbE PHY chip we use and I haven't found it neither in DigiKey, nor at Mouser. At Arrow they are "Call for Quote": http://components.arrow.com/part/search/ET1011C2 Do you know what happened to this chip? Is there any pin-to-pin replacements or could we buy enough of those chips from some other source? -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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UmTRXv2-- it's alive!
by Robin Coxe 05 Oct '12

05 Oct '12

Alexander is visiting Boston after the Open Hardware Summit last week in NYC. We powered up the umTRXv2 for the first time yesterday afternoon and immediately captured a GSM signal on the Signal Hound after launching OpenBTS. Echo Test with the test handset worked like a charm. Congratulations to the Fairwaves team! -Robin -- Robin Coxe | Close-Haul Communications, Inc. | Boston, MA +1-617-470-8825

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Building FPGA and ZPU for UmTRX
by Alexander Chemeris 26 Sep '12

26 Sep '12

All, I've put together a short step-by-step on how to build FPGA image for UmTRX and how to flash it over Ethernet or a JTAG cable. Feel free to amend/comment on it: http://code.google.com/p/umtrx/wiki/BuildingUHD -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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UHD support for tuning on UmTRX
by Alexander Chemeris 26 Sep '12

26 Sep '12

Hi all, I've just pushed changes to the 'fairwaves/umtrx' branch which allow UHD to actually control UmTRX tuning. This means that now we don't need to calculate Rx/Tx frequencies by hands to run OpenBTS - it will tune automatically. I've updated the wiki to reflect those changes as well. Changes are based on the Sergey Kostanbaev's work to move all our LMS6002 control from umtrx_lms.py script to the UHD. The next most important things to get working there are: * gains control aka VGA1/VGA2 in LMS * antenna control aka PA/LNA selection in LMS * bandwidth filtering control aka LPF filters in LMS * automatic calibration utilities -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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