From andreysviyaz at gmail.com Fri Aug 3 11:42:35 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 3 Aug 2012 15:42:35 +0400 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: Hi. Here LMS TxLO noise plot for OHM4048V-26MHz OCXO. Best regards, Andrey Sviyazov. 2012/7/31 Andrey Sviyazov > That's good news! > Yes, of course, I have to test it and then share some results. > > Best regards, > Andrey Sviyazov. > > > > 2012/7/31 Alexander Chemeris > >> Hi, >> >> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey Sviyazov >> - could you measure their performance and test UmTRX with them? >> >> -- >> Regards, >> Alexander Chemeris. >> CEO, Fairwaves LLC / ??? ??????? >> http://fairwaves.ru >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TxLO noise at OHM4 ocxo.png Type: image/png Size: 36885 bytes Desc: not available URL: From alexander.chemeris at gmail.com Fri Aug 3 12:32:20 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Fri, 3 Aug 2012 16:32:20 +0400 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: So, looks like it has a bit worse far-end noise, but otherwise is about the same as TCXO we use now, correct? Btw, was it UmTRX layout incorrect or the OCXO pinout? On Fri, Aug 3, 2012 at 3:42 PM, Andrey Sviyazov wrote: > Hi. > > Here LMS TxLO noise plot for OHM4048V-26MHz OCXO. > > Best regards, > Andrey Sviyazov. > > > > 2012/7/31 Andrey Sviyazov >> >> That's good news! >> Yes, of course, I have to test it and then share some results. >> >> Best regards, >> Andrey Sviyazov. >> >> >> >> 2012/7/31 Alexander Chemeris >>> >>> Hi, >>> >>> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey Sviyazov >>> - could you measure their performance and test UmTRX with them? >>> >>> -- >>> Regards, >>> Alexander Chemeris. >>> CEO, Fairwaves LLC / ??? ??????? >>> http://fairwaves.ru >>> >> > -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From andreysviyaz at gmail.com Fri Aug 3 13:29:13 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 3 Aug 2012 17:29:13 +0400 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: 1/ Yes, my fears were confirmed - OHM4 footprint isn't correct (my mistake), but it possible to mount from bottom side. 2/ Noise plots are similar, I think we see limit of LMS performance but not XO (see pictures here). Also, I found that for 1850MHz better to use Icp=1.2mA. Therefore I decide to measure at 1.2mA for both frequencies just to compare. If Icp dependance of frequency confirmed, then we need lookup table for this also. Best regards, Andrey Sviyazov. 2012/8/3 Alexander Chemeris > So, looks like it has a bit worse far-end noise, but otherwise is > about the same as TCXO we use now, correct? > > Btw, was it UmTRX layout incorrect or the OCXO pinout? > > On Fri, Aug 3, 2012 at 3:42 PM, Andrey Sviyazov > wrote: > > Hi. > > > > Here LMS TxLO noise plot for OHM4048V-26MHz OCXO. > > > > Best regards, > > Andrey Sviyazov. > > > > > > > > 2012/7/31 Andrey Sviyazov > >> > >> That's good news! > >> Yes, of course, I have to test it and then share some results. > >> > >> Best regards, > >> Andrey Sviyazov. > >> > >> > >> > >> 2012/7/31 Alexander Chemeris > >>> > >>> Hi, > >>> > >>> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey Sviyazov > >>> - could you measure their performance and test UmTRX with them? > >>> > >>> -- > >>> Regards, > >>> Alexander Chemeris. > >>> CEO, Fairwaves LLC / ??? ??????? > >>> http://fairwaves.ru > >>> > >> > > > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TxLO noise at 947MHz for OHM4 vs TCD4.png Type: image/png Size: 59191 bytes Desc: not available URL: From andreysviyaz at gmail.com Fri Aug 3 13:34:02 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 3 Aug 2012 17:34:02 +0400 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: Actually, I don't have enough time to research of it more, because of preselector design in progress. Best regards, Andrey Sviyazov. 2012/8/3 Andrey Sviyazov > 1/ Yes, my fears were confirmed - OHM4 footprint isn't correct (my > mistake), but it possible to mount from bottom side. > 2/ Noise plots are similar, I think we see limit of LMS performance but > not XO (see pictures here). > > Also, I found that for 1850MHz better to use Icp=1.2mA. > Therefore I decide to measure at 1.2mA for both frequencies just to > compare. > If Icp dependance of frequency confirmed, then we need lookup table for > this also. > > Best regards, > Andrey Sviyazov. > > > > 2012/8/3 Alexander Chemeris > >> So, looks like it has a bit worse far-end noise, but otherwise is >> about the same as TCXO we use now, correct? >> >> Btw, was it UmTRX layout incorrect or the OCXO pinout? >> >> On Fri, Aug 3, 2012 at 3:42 PM, Andrey Sviyazov >> wrote: >> > Hi. >> > >> > Here LMS TxLO noise plot for OHM4048V-26MHz OCXO. >> > >> > Best regards, >> > Andrey Sviyazov. >> > >> > >> > >> > 2012/7/31 Andrey Sviyazov >> >> >> >> That's good news! >> >> Yes, of course, I have to test it and then share some results. >> >> >> >> Best regards, >> >> Andrey Sviyazov. >> >> >> >> >> >> >> >> 2012/7/31 Alexander Chemeris >> >>> >> >>> Hi, >> >>> >> >>> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey Sviyazov >> >>> - could you measure their performance and test UmTRX with them? >> >>> >> >>> -- >> >>> Regards, >> >>> Alexander Chemeris. >> >>> CEO, Fairwaves LLC / ??? ??????? >> >>> http://fairwaves.ru >> >>> >> >> >> > >> >> >> >> -- >> Regards, >> Alexander Chemeris. >> CEO, Fairwaves LLC / ??? ??????? >> http://fairwaves.ru >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Fri Aug 3 13:45:11 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Fri, 3 Aug 2012 17:45:11 +0400 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: On Fri, Aug 3, 2012 at 5:29 PM, Andrey Sviyazov wrote: > 1/ Yes, my fears were confirmed - OHM4 footprint isn't correct (my mistake), > but it possible to mount from bottom side. Ok. Please document this to the tracker. We'll fix it when we make the second generation of PCB. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From s.milenkovic at limemicro.com Fri Aug 3 14:28:02 2012 From: s.milenkovic at limemicro.com (Srdjan Milenkovic) Date: Fri, 03 Aug 2012 15:28:02 +0100 Subject: Pletronics OHM4 In-Reply-To: References:

Message-ID: <501BDFF2.70709@limemicro.com> Hi Andrey, Yes, the best value of Icp will vary with frequency as Kvco is changing. Hence, we have option to make look up table or to deign dedicated loop filters for the bands of interest. There are no too many bands according to Alexander's email, only 4 (effectively 2). Look up table may be more flexible solution as you do need to change BOM i.e. hardware platform stays the same. Best regards, Srdjan On 03/08/2012 14:29, Andrey Sviyazov wrote: > 1/ Yes, my fears were confirmed - OHM4 footprint isn't correct (my > mistake), but it possible to mount from bottom side. > 2/ Noise plots are similar, I think we see limit of LMS performance > but not XO (see pictures here). > > Also, I found that for 1850MHz better to use Icp=1.2mA. > Therefore I decide to measure at 1.2mA for both frequencies just to > compare. > If Icp dependance of frequency confirmed, then we need lookup table > for this also. > > Best regards, > Andrey Sviyazov. > > > > 2012/8/3 Alexander Chemeris > > > So, looks like it has a bit worse far-end noise, but otherwise is > about the same as TCXO we use now, correct? > > Btw, was it UmTRX layout incorrect or the OCXO pinout? > > On Fri, Aug 3, 2012 at 3:42 PM, Andrey Sviyazov > > wrote: > > Hi. > > > > Here LMS TxLO noise plot for OHM4048V-26MHz OCXO. > > > > Best regards, > > Andrey Sviyazov. > > > > > > > > 2012/7/31 Andrey Sviyazov > > >> > >> That's good news! > >> Yes, of course, I have to test it and then share some results. > >> > >> Best regards, > >> Andrey Sviyazov. > >> > >> > >> > >> 2012/7/31 Alexander Chemeris > > >>> > >>> Hi, > >>> > >>> I've received 10pcs of OHM4048052GG010020-26.0M today. Andrey > Sviyazov > >>> - could you measure their performance and test UmTRX with them? > >>> > >>> -- > >>> Regards, > >>> Alexander Chemeris. > >>> CEO, Fairwaves LLC / ??? ??????? > >>> http://fairwaves.ru > >>> > >> > > > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Sat Aug 4 04:29:01 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Sat, 4 Aug 2012 08:29:01 +0400 Subject: Fwd: [Discuss] OHS tickets are now available In-Reply-To: References: Message-ID: Thomas, Robin, Sylvain, If you want to attend OHS, I recommend you to get tickets NOW - they are ridiculously few of them left. ---------- Forwarded message ---------- From: Catarina Mota Date: Sat, Aug 4, 2012 at 2:20 AM Subject: [Discuss] OHS tickets are now available To: The Open Source Hardware Association Discussion List We have two types of tickets: ? Starving Artist Pass: ($50) For artists, students, and non-profits ? Summit Pass: ($75) Everybody else All passes include: breakfast, snacks, post-conference drinks, and an amazing gift bag from our sponsors. Please note that this year we will not be serving lunch at the conference, but we will be in the beautiful Chelsea area of Manhattan where there are many restaurants for you to choose from. Ticket types are not strictly enforced, so please exercise your judgment. Check out the speaker lineup: http://summit.oshwa.org/2012/07/23/2012-speaker-lineup Get your tickets: http://ohsummit.eventbrite.com More info about the summit: http://summit.oshwa.org/ Cheers, Catarina & Dustyn _______________________________________________ discuss mailing list discuss at lists.oshwa.org http://lists.oshwa.org/listinfo/discuss -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From plddesigner at gmail.com Tue Aug 7 19:06:51 2012 From: plddesigner at gmail.com (Andrew Karpenkov) Date: Tue, 7 Aug 2012 23:06:51 +0400 Subject: Host access to UmTRX registers Message-ID: Hi All, I added control logic of LMS reset pins into ZPU firmware (commit 25a89e337b98f89d542a8bd51a3bfb6dc2a9f441 at the akarpenkov/dual-channel branch). I need to take control under Diversity switches and LMS reset pins from host. As I understand, python script "umtrx_ctrl.py" is not able write FPGA registers, it's can talk only with SPI devices. Max, Sylvain or anyone else, can you help me get access to FPGA registers (they connected to wishbone bus) from host? I'm not very good at programming on python.. UHD can do this (example here: host\lib\usrp\usrp2\usrp2_impl.cpp:530). Also I added second RX and TX channels to the FPGA firmware and according with that changed memory maps in ZPU and HOST firmwares (all changes at the akarpenkov/dual-channel branch on github). Work of TX and RX DSP 2 units I can't check due to complete lack of support in the HOST software. Could anyone make needed changes at HOST firmware? Regards, Andrew Karpenkov -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Wed Aug 8 06:19:39 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Wed, 8 Aug 2012 10:19:39 +0400 Subject: UmTRX/OpenBTS at the GnuRadioConference and OpenHardwareSummit Message-ID: Hi all, I've just got an approval from Tom Rondeau that we'll present UmTRX at GRC at the hardware session (we'll be added to the official schedule soon): http://www.trondeau.com/grc2012-dates/ We'll be also doing a demo session at the Open Hardware Summit, showing OpenBTS with UmTRX: http://summit.oshwa.org/ Come visit us there! -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From andreysviyaz at gmail.com Wed Aug 8 17:15:27 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Wed, 8 Aug 2012 21:15:27 +0400 Subject: UmTRX preselector In-Reply-To: References: Message-ID: 2012/8/8 Jean-Samuel Najnudel - BJT PARTNERS SARL > Hi Andrey, > > Thank you very much for your reply. > > I understand your point of view regarding the ADF4350. I agree with you, > the ADF4350 still have quite good performances. I also agree that easier > software support is also important. It would just be a great news if we > could pass the GSM spec, at least as micro BTS. > > Regarding the GSM 1800 version of the selectivity board, it will not be a > problem to change the mixer and the filters. However, are you sure we will > be able to get the correct matching if we only change the passives ? Are > you sure we would not need to modify the PCB traces to get a good matching > for a 1800 MHz version of the board ? What do you think ? > Most of cooper would be 50 Ohm, so only FR-4 losses a bit higher. Also RF cables losses and so on, therefore 1800 parameters will be a bit worse, but it typical. About components, I've checked again and found that RF SAW filter for 1800 UL require coil at input (added). Best regards, Andrey Sviyazov. > > Best regards. > > Jean-Samuel. > :-) > > > > On Tue, Aug 7, 2012 at 7:27 PM, Andrey Sviyazov wrote: > >> Hi Jean-Samuel. >> >> 1/ A few weeks ago, we discussed together about phase noise issues to be >>> able to pass the GSM spec. You explained HMC830LP6GE has much better >>> performances than the ADF4350. I know the HMC830LP6GE is a bit more >>> expensive but, as discussed together before, I really believe this worth >>> the extra cost. This would allow us to pass the macro or at least micro BTS >>> specs without the need for designing another slectivity board. This would >>> save a lot of work. Moreover, we espcially need this preselectivity board >>> for a micro or even macro BTS. In this use case, I really believe price >>> difference (like 40 or 50 USD) will be very low, especially compared to all >>> other costs of a mid-long range micro/macro BTS installation. Unless you >>> really disagree, I would really suggest to use the best performance >>> components as we reasonably can. >>> >> >> First of all, Robin said that ADF4350 already supported by UHD therefore >> it could save time to implement it for UmTRX. >> 2nd, I think that parameters differences isn't really as significant (few >> dB) as price and soft changing time cost. >> 3rd, it isn't last design and I am sure that we will change it for more >> functions, performances and for housing adaptations. >> Also I'm planing to buy HP4352 to design and measure PLL's, so of course >> I'll test HMC830 too, but now we just have to be sure that it will work >> properly and without risks. >> >> >>> 2/ In my deployment in Mayotte, I will also deploy GSM 1800 band base >>> stations because most of the spectrum I have is in this frequency band. To >>> avoid making another PCB for GSM 1800, could you design the board to allow >>> to populate either GSM 900 or GSM 1800 filters and matching passives with >>> the same PCB copper ? A single PCB would be easier to test and to maintain. >>> Moreover, this would save some costs as we will be able to order lager PCB >>> volumes. This could make a quite significant saving. Please let me know >>> what you think about this. >>> >> As I mentioned before, there are band specific components with same >> footprint. >> So, there are no changes required in PCB design for 1800 band, only BOM. >> For example, HMC485 instead of HMC483 and FAR-F6KA-1G7475 instead of >> FAR-F5KA-897. >> >> Best regards, >> Andrey Sviyazov. >> >> >> >>> >>> Anyway, thank you very much for this design. With UmTRX, this would >>> really make a cost effective and great performances base station. Thanks a >>> lot. >>> >>> By the way, as I am abroad, I may take a bit more time than usual to >>> reply to your e-mails. I really appologize for this and I will do my best >>> to reply as soon as I can. >>> >>> Best regards. >>> >>> Jean-Samuel. >>> :-) >>> >>> >>> >>> On Mon, Aug 6, 2012 at 5:07 PM, Andrey Sviyazov wrote: >>> >>>> I've found first error: >>>> Missed AC block required for Vref pin of ADF4350. >>>> Also translated some components descriptions to English to avoid >>>> misunderstanding of Russian. >>>> All newest files here in zip. >>>> >>>> Best regards, >>>> Andrey Sviyazov. >>>> >>>> >>>> >>>> 2012/8/6 Andrey Sviyazov >>>> >>>>> Sorry. >>>>> Zip file here :) >>>>> >>>>> Best regards, >>>>> Andrey Sviyazov. >>>>> >>>>> >>>>> >>>>> 2012/8/6 Andrey Sviyazov >>>>> >>>>>> Hi all. >>>>>> >>>>>> Here first release of preselector project, schema and BOM. >>>>>> Any questions and suggestions welcomed. >>>>>> >>>>>> Best regards, >>>>>> Andrey Sviyazov. >>>>>> >>>>>> >>>>> >>>> >>> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreysviyaz at gmail.com Wed Aug 8 17:16:38 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Wed, 8 Aug 2012 21:16:38 +0400 Subject: UmTRX preselector In-Reply-To: References: Message-ID: 2012/8/8 Sylvain Munaut <246tnt at gmail.com> Which spec is that exactly ? > Its about far-near problem (05.05 p.5.1), i.e. blocking by near mobile with high signal at only 600kHz offset. Therefore, calculated that LO noise at 600kHz offset should be around -140dBc/Hz to keep nominal Rx sencitivity for wanted far mobile. > > Regarding the GSM 1800 version of the selectivity board, it will not be a > > problem to change the mixer and the filters. However, are you sure we > will > > be able to get the correct matching if we only change the passives ? Are > you > > sure we would not need to modify the PCB traces to get a good matching > for a > > 1800 MHz version of the board ? What do you think ? > > Unless I missed something fundamental, this board is only RX side right ? > Yes, it contain LNA, DivSwitch, down converter and IF filter for Rx path only. Late I'll make band dependant boards with 1-2W TxPA and ceramic duplexer. But, possible no reasons to do it, I don't sure yet. To get any significant loss in RX due to mismatch, you need a very > large mismatch. > Yes. Best regards, Andrey Sviyazov. -------------- next part -------------- An HTML attachment was scrubbed... URL: From 246tnt at gmail.com Wed Aug 8 18:46:57 2012 From: 246tnt at gmail.com (Sylvain Munaut) Date: Wed, 8 Aug 2012 20:46:57 +0200 Subject: UmTRX preselector In-Reply-To: References: Message-ID: Hi, > Its about far-near problem (05.05 p.5.1), i.e. blocking by near mobile with > high signal at only 600kHz offset. > Therefore, calculated that LO noise at 600kHz offset should be around > -140dBc/Hz to keep nominal Rx sencitivity for wanted far mobile. Mmm, interesting, I had never thought about this. Can you confirm my computation is the right one : Minimum Ec/No of 8 dB, thernal noise of GSM ~ -120 dBm, so the weakest mobile would be a -112 dBm. The interference I see specified in 05.05 is a -26 dBm sine, so with -140 dBc/Hz you'd get a -166 dBm 'leak' of the interference in the signal of interest at any given position, which you need to integrate over the entire useful bandwidth of the GSM signal ( 271 kHz -> 10 * log10(271e3) = 54 dB ), which would give a -112 dBm noise. Cheers, Sylvain From andreysviyaz at gmail.com Thu Aug 9 05:17:38 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Thu, 9 Aug 2012 09:17:38 +0400 Subject: UmTRX preselector In-Reply-To: References: Message-ID: 08.08.2012 22:46 ???????????? "Sylvain Munaut" <246tnt at gmail.com> ???????: > > Hi, > > > Its about far-near problem (05.05 p.5.1), i.e. blocking by near mobile with > > high signal at only 600kHz offset. > > Therefore, calculated that LO noise at 600kHz offset should be around > > -140dBc/Hz to keep nominal Rx sencitivity for wanted far mobile. > > Mmm, interesting, I had never thought about this. > > Can you confirm my computation is the right one : > > Minimum Ec/No of 8 dB, thernal noise of GSM ~ -120 dBm, so the weakest > mobile would be a -112 dBm. > > The interference I see specified in 05.05 is a -26 dBm sine, so with > -140 dBc/Hz you'd get a -166 dBm 'leak' of the interference in the > signal of interest at any given position, which you need to integrate > over the entire useful bandwidth of the GSM signal ( 271 kHz -> 10 * > log10(271e3) = 54 dB ), which would give a -112 dBm noise. > > Cheers, > > Sylvain Yes, your computation confirm that we can get noise flour -109 dBm in summary. But I can't understand this stupid requirement. Really blocker it is mobile signal, therefore it will make direct jumming due to GMSK spectrum mask. What do you think about it? Best regards, Andrey Sviyazov. (Sent from my mobile client) -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreysviyaz at gmail.com Mon Aug 13 09:08:29 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Mon, 13 Aug 2012 13:08:29 +0400 Subject: UmTRX preselector In-Reply-To: References:

Message-ID: Hi all. I have question about preselector improving: Do we need on-board eeprom for identification? It also can contain band and IF freq values, T'C look-up table for SAW, etc. Best regards, Andrey Sviyazov. 2012/8/9 Andrey Sviyazov > > 08.08.2012 22:46 ???????????? "Sylvain Munaut" <246tnt at gmail.com> ???????: > > > > > Hi, > > > > > Its about far-near problem (05.05 p.5.1), i.e. blocking by near mobile > with > > > high signal at only 600kHz offset. > > > Therefore, calculated that LO noise at 600kHz offset should be around > > > -140dBc/Hz to keep nominal Rx sencitivity for wanted far mobile. > > > > Mmm, interesting, I had never thought about this. > > > > Can you confirm my computation is the right one : > > > > Minimum Ec/No of 8 dB, thernal noise of GSM ~ -120 dBm, so the weakest > > mobile would be a -112 dBm. > > > > The interference I see specified in 05.05 is a -26 dBm sine, so with > > -140 dBc/Hz you'd get a -166 dBm 'leak' of the interference in the > > signal of interest at any given position, which you need to integrate > > over the entire useful bandwidth of the GSM signal ( 271 kHz -> 10 * > > log10(271e3) = 54 dB ), which would give a -112 dBm noise. > > > > Cheers, > > > > Sylvain > Yes, your computation confirm that we can get noise flour -109 dBm in > summary. > But I can't understand this stupid requirement. > Really blocker it is mobile signal, therefore it will make direct jumming > due to GMSK spectrum mask. > What do you think about it? > > Best regards, > Andrey Sviyazov. > (Sent from my mobile client) > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Mon Aug 13 09:11:26 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Mon, 13 Aug 2012 13:11:26 +0400 Subject: UmTRX preselector In-Reply-To: References:

Message-ID: On Mon, Aug 13, 2012 at 1:08 PM, Andrey Sviyazov wrote: > I have question about preselector improving: > Do we need on-board eeprom for identification? > It also can contain band and IF freq values, T'C look-up table for SAW, > etc. Good idea. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From coxe at close-haul.com Wed Aug 22 19:18:31 2012 From: coxe at close-haul.com (Robin Coxe) Date: Wed, 22 Aug 2012 15:18:31 -0400 Subject: Question about the name UmTRX Message-ID: I've been meaning to ask this question for a while and am just now getting around to it-- does the Um in UmTRX mean something significant in Russian? -- Robin Coxe | Close-Haul Communications, Inc. | Boston, MA +1-617-470-8825 -------------- next part -------------- An HTML attachment was scrubbed... URL: From martin at windycitysdr.com Wed Aug 22 19:21:11 2012 From: martin at windycitysdr.com (Martin O'Shield) Date: Wed, 22 Aug 2012 14:21:11 -0500 Subject: Um Definition = Re: Question about the name UmTRX Message-ID: > > Robin, > > > Um is the name of the GSM interface between the Mobile handset and the GSM > Network. > > Sincerely, > > > Martin > > > On Wed, Aug 22, 2012 at 2:18 PM, Robin Coxe wrote: > >> I've been meaning to ask this question for a while and am just now >> getting around to it-- does the Um in UmTRX mean something significant in >> Russian? >> >> -- >> Robin Coxe | Close-Haul Communications, Inc. | Boston, MA >> +1-617-470-8825 >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Wed Aug 22 19:30:48 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Wed, 22 Aug 2012 23:30:48 +0400 Subject: Question about the name UmTRX In-Reply-To: References: Message-ID: Hi Robin, On Wed, Aug 22, 2012 at 11:18 PM, Robin Coxe wrote: > I've been meaning to ask this question for a while and am just now getting > around to it-- does the Um in UmTRX mean something significant in Russian? As mentioned earlier, one meaning is that Um is a name of the GSM air interface. The other meaning is that in Russian "um" ("??") means "intellect". -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From alexander.chemeris at gmail.com Thu Aug 23 19:28:40 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Thu, 23 Aug 2012 23:28:40 +0400 Subject: UmTRX preselector frontend updae Message-ID: Hi all, Here is an update about a preselector frontend board on which we're working right now. Attached is an updated schematics of the board and 3D view of the board itself and the proposed way of mounting it to the main board. The github repository still contain an older revision of the schematics - I will update it a bit later when I get full project files from Andrey Sviyazov. https://github.com/chemeris/umtrx-schematics/tree/master/umtrx-v2-rxsel We would appreciate all constructive comments about the board design - from both RF and mechanical points of view. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru -------------- next part -------------- A non-text attachment was scrubbed... Name: UmSELv1-1.png Type: image/png Size: 172596 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: UmTRXv2+UmSELv1-1.png Type: image/png Size: 91783 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: UmTRXv2+UmSELv1-2.png Type: image/png Size: 243530 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: UmTRXv2_RxSel.pdf Type: application/pdf Size: 419937 bytes Desc: not available URL: From alexander.chemeris at gmail.com Fri Aug 24 03:31:50 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Fri, 24 Aug 2012 07:31:50 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References: Message-ID: Andrey, Could you remind me what the IF after the preselector? A comment from Harald from IRC: I hope the IF is not above 380 MHz, because 380...400 MHz is the European emergency services band (strong tetra BTS, ...) On Thu, Aug 23, 2012 at 11:28 PM, Alexander Chemeris wrote: > Hi all, > > Here is an update about a preselector frontend board on which > we're working right now. Attached is an updated schematics of the > board and 3D view of the board itself and the proposed way of mounting > it to the main board. > > The github repository still contain an older revision of the > schematics - I will update it a bit later when I get full project > files from Andrey Sviyazov. > https://github.com/chemeris/umtrx-schematics/tree/master/umtrx-v2-rxsel > > We would appreciate all constructive comments about the board design - > from both RF and mechanical points of view. > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From jsn at bjtpartners.com Fri Aug 24 08:34:27 2012 From: jsn at bjtpartners.com (Jean-Samuel Najnudel - BJT PARTNERS SARL) Date: Fri, 24 Aug 2012 10:34:27 +0200 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: Hi Alexander, As far as I understand, the IF frequency should be 360 MHz as the UmSEL uses the TB0130A IF SAW filter. Its center frequency is 360 MHz. By the way, why do you say it would be a problem if IF was above 380 MHz ? Because of interferences ? In this case, would it still be problem if we install the UmTRX + UmSEL boards inside an enclosure ? Best regards. Jean-Samuel. :-) On Fri, Aug 24, 2012 at 5:31 AM, Alexander Chemeris < alexander.chemeris at gmail.com> wrote: > Andrey, > > Could you remind me what the IF after the preselector? > > A comment from Harald from IRC: I hope the IF is not above 380 MHz, > because 380...400 MHz is the European emergency services band (strong > tetra BTS, ...) > > On Thu, Aug 23, 2012 at 11:28 PM, Alexander Chemeris > wrote: > > Hi all, > > > > Here is an update about a preselector frontend board on which > > we're working right now. Attached is an updated schematics of the > > board and 3D view of the board itself and the proposed way of mounting > > it to the main board. > > > > The github repository still contain an older revision of the > > schematics - I will update it a bit later when I get full project > > files from Andrey Sviyazov. > > https://github.com/chemeris/umtrx-schematics/tree/master/umtrx-v2-rxsel > > > > We would appreciate all constructive comments about the board design - > > from both RF and mechanical points of view. > > > > -- > > Regards, > > Alexander Chemeris. > > CEO, Fairwaves LLC / ??? ??????? > > http://fairwaves.ru > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Fri Aug 24 12:13:55 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Fri, 24 Aug 2012 16:13:55 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: On Fri, Aug 24, 2012 at 12:34 PM, Jean-Samuel Najnudel - BJT PARTNERS SARL wrote: > Hi Alexander, > > As far as I understand, the IF frequency should be 360 MHz as the UmSEL uses > the TB0130A IF SAW filter. Its center frequency is 360 MHz. Ok, thanks. > By the way, why do you say it would be a problem if IF was above 380 MHz ? > Because of interferences ? In this case, would it still be problem if we > install the UmTRX + UmSEL boards inside an enclosure ? Well, the original question was from Harald, but the concern was with interference, yes. I think it depends on the type of enclosure we use. Andrey should be able to comment here. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From andreysviyaz at gmail.com Fri Aug 24 13:32:48 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 24 Aug 2012 17:32:48 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: Alexander, could you please push through my letter? Stopped due to over 1MB :( Best regards, Andrey Sviyazov. -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreysviyaz at gmail.com Fri Aug 24 13:27:19 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 24 Aug 2012 17:27:19 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: Hi all! > As far as I understand, the IF frequency should be 360 MHz as the UmSEL > uses > > the TB0130A IF SAW filter. Its center frequency is 360 MHz. > Yes, IF freq can be 360MHz (TB0130A) or 400MHz (TB0448A), matching components there is for both variants (C32/C38, C46/C51). > > By the way, why do you say it would be a problem if IF was above 380 MHz > ? > > Because of interferences ? In this case, would it still be problem if we > > install the UmTRX + UmSEL boards inside an enclosure ? > > Well, the original question was from Harald, but the concern was with > interference, yes. > I thought about these well known problems like strong mirror (image) freq's with their interfer's, direct passthrough, LO-ANT emission and so on. So, month ago I made measures of RF SAW filter TA1003A (see pics here). Actually, I chose quite typical method - additional highpass filter (Z6 - HFCN-740+). I hope it can help to avoid most of those low-frequencies problems. It will be much better if Taiyo Yuden RF filters would be used (those filters also known as Fujitsu brand). > I think it depends on the type of enclosure we use. Andrey should be > able to comment here. > Yes, of course, tower-mounted enclosures should be not only IP65, but also EMI isolated. Best regards, Andrey Sviyazov. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TA1003_near_band.jpg Type: image/jpeg Size: 413664 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TA1003_wide_high.jpg Type: image/jpeg Size: 298537 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TA1003_wide_low.jpg Type: image/jpeg Size: 282089 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: TA1003+HFCN740.jpg Type: image/jpeg Size: 307780 bytes Desc: not available URL: From 246tnt at gmail.com Fri Aug 24 14:08:47 2012 From: 246tnt at gmail.com (Sylvain Munaut) Date: Fri, 24 Aug 2012 16:08:47 +0200 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: BTW, Are you using upper or lower image ? Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz right ? With 1.3 GHz you will get images from 1.7 GHz With 500 MHz you will get images from 100 MHz (FM Radio !!!) Cheers, Sylvain From andreysviyaz at gmail.com Fri Aug 24 14:29:48 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Fri, 24 Aug 2012 18:29:48 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: I think to use 550mhz in case of 360 mhz IF. So image will be around 190 mhz, but here also there are very strong TV and trank radios. Best regards, Andrey Sviyazov. (Sent from my mobile client) 24.08.2012 18:08 ???????????? "Sylvain Munaut" <246tnt at gmail.com> ???????: > BTW, > > Are you using upper or lower image ? > > Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz > right ? > > With 1.3 GHz you will get images from 1.7 GHz > With 500 MHz you will get images from 100 MHz (FM Radio !!!) > > Cheers, > > Sylvain > -------------- next part -------------- An HTML attachment was scrubbed... URL: From alexander.chemeris at gmail.com Sat Aug 25 11:24:26 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Sat, 25 Aug 2012 15:24:26 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: I've discarded those e-mails because of their size and instead I've checked in those files into the git: https://github.com/chemeris/umtrx-schematics Your comments are welcome. On Fri, Aug 24, 2012 at 10:12 PM, Andrey Sviyazov wrote: > Here zip with PCB and Gerbers. > That's all folks ;) > > > Best regards, > Andrey Sviyazov. > > > > 2012/8/24 Andrey Sviyazov >> >> Hi all. >> >> Here zip with all project files include PDF and BOM for GSM900 assembly >> variant. >> PCB and Gerber will be in the next letter. >> >> Best regards, >> Andrey Sviyazov. >> >> >> >> 2012/8/24 Andrey Sviyazov >>> >>> I think to use 550mhz in case of 360 mhz IF. >>> So image will be around 190 mhz, but here also there are very strong TV >>> and trank radios. >>> >>> Best regards, >>> Andrey Sviyazov. >>> (Sent from my mobile client) >>> >>> 24.08.2012 18:08 ???????????? "Sylvain Munaut" <246tnt at gmail.com> >>> ???????: >>> >>>> BTW, >>>> >>>> Are you using upper or lower image ? >>>> >>>> Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz >>>> right ? >>>> >>>> With 1.3 GHz you will get images from 1.7 GHz >>>> With 500 MHz you will get images from 100 MHz (FM Radio !!!) >>>> >>>> Cheers, >>>> >>>> Sylvain >> >> > -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From alexander.chemeris at gmail.com Sat Aug 25 11:43:31 2012 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Sat, 25 Aug 2012 15:43:31 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: And one question from me - wouldn't it be better to move "CH1" and "CH2" label to outside of the boxes? If we decide to put actual EMI shields, labels will be hidden. On Sat, Aug 25, 2012 at 3:24 PM, Alexander Chemeris wrote: > I've discarded those e-mails because of their size and instead I've > checked in those files into the git: > https://github.com/chemeris/umtrx-schematics > > Your comments are welcome. > > On Fri, Aug 24, 2012 at 10:12 PM, Andrey Sviyazov > wrote: >> Here zip with PCB and Gerbers. >> That's all folks ;) >> >> >> Best regards, >> Andrey Sviyazov. >> >> >> >> 2012/8/24 Andrey Sviyazov >>> >>> Hi all. >>> >>> Here zip with all project files include PDF and BOM for GSM900 assembly >>> variant. >>> PCB and Gerber will be in the next letter. >>> >>> Best regards, >>> Andrey Sviyazov. >>> >>> >>> >>> 2012/8/24 Andrey Sviyazov >>>> >>>> I think to use 550mhz in case of 360 mhz IF. >>>> So image will be around 190 mhz, but here also there are very strong TV >>>> and trank radios. >>>> >>>> Best regards, >>>> Andrey Sviyazov. >>>> (Sent from my mobile client) >>>> >>>> 24.08.2012 18:08 ???????????? "Sylvain Munaut" <246tnt at gmail.com> >>>> ???????: >>>> >>>>> BTW, >>>>> >>>>> Are you using upper or lower image ? >>>>> >>>>> Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz >>>>> right ? >>>>> >>>>> With 1.3 GHz you will get images from 1.7 GHz >>>>> With 500 MHz you will get images from 100 MHz (FM Radio !!!) >>>>> >>>>> Cheers, >>>>> >>>>> Sylvain >>> >>> >> > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ??? ??????? http://fairwaves.ru From andreysviyaz at gmail.com Sat Aug 25 14:10:06 2012 From: andreysviyaz at gmail.com (Andrey Sviyazov) Date: Sat, 25 Aug 2012 18:10:06 +0400 Subject: UmTRX preselector frontend updae In-Reply-To: References:

Message-ID: I hope screening is not really required. Anyway, you need only connectors labels if all covered by screen. Best regards, Andrey Sviyazov. (Sent from my mobile client) 25.08.2012 15:43 ???????????? "Alexander Chemeris" < alexander.chemeris at gmail.com> ???????: > And one question from me - wouldn't it be better to move "CH1" and > "CH2" label to outside of the boxes? If we decide to put actual EMI > shields, labels will be hidden. > > On Sat, Aug 25, 2012 at 3:24 PM, Alexander Chemeris > wrote: > > I've discarded those e-mails because of their size and instead I've > > checked in those files into the git: > > https://github.com/chemeris/umtrx-schematics > > > > Your comments are welcome. > > > > On Fri, Aug 24, 2012 at 10:12 PM, Andrey Sviyazov > > wrote: > >> Here zip with PCB and Gerbers. > >> That's all folks ;) > >> > >> > >> Best regards, > >> Andrey Sviyazov. > >> > >> > >> > >> 2012/8/24 Andrey Sviyazov > >>> > >>> Hi all. > >>> > >>> Here zip with all project files include PDF and BOM for GSM900 assembly > >>> variant. > >>> PCB and Gerber will be in the next letter. > >>> > >>> Best regards, > >>> Andrey Sviyazov. > >>> > >>> > >>> > >>> 2012/8/24 Andrey Sviyazov > >>>> > >>>> I think to use 550mhz in case of 360 mhz IF. > >>>> So image will be around 190 mhz, but here also there are very strong > TV > >>>> and trank radios. > >>>> > >>>> Best regards, > >>>> Andrey Sviyazov. > >>>> (Sent from my mobile client) > >>>> > >>>> 24.08.2012 18:08 ???????????? "Sylvain Munaut" <246tnt at gmail.com> > >>>> ???????: > >>>> > >>>>> BTW, > >>>>> > >>>>> Are you using upper or lower image ? > >>>>> > >>>>> Let's say bringing 900 to 400 you can use LO of 1.3 GHz or of 500 MHz > >>>>> right ? > >>>>> > >>>>> With 1.3 GHz you will get images from 1.7 GHz > >>>>> With 500 MHz you will get images from 100 MHz (FM Radio !!!) > >>>>> > >>>>> Cheers, > >>>>> > >>>>> Sylvain > >>> > >>> > >> > > > > > > > > -- > > Regards, > > Alexander Chemeris. > > CEO, Fairwaves LLC / ??? ??????? > > http://fairwaves.ru > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ??? ??????? > http://fairwaves.ru > -------------- next part -------------- An HTML attachment was scrubbed... URL: