UmTRX

umtrx@lists.osmocom.org

189 discussions

transceiver : no process found
by Manoel Aposaz 10 Feb '14

10 Feb '14

Hello i installed all the package of openBTS and it was working properly, but last time i take the server and connect the Umtrx module, the ping command work properly, uhd_find_devices also work but i have this masseage: transceiver ; no process found... and after a long message comes telling me that the network is unreachable. Just last week all this was working properly. Can someone tell me ho to fix it please? or do i need to flash again the module Umtrx? *Manoel Aposaz.* *The limite of our Greatest achievement will depend on the depth of our imagination and our relation with God.* Tel : 77 113 24 83. Kleiv...

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SIP trunking provider recommendation?
by Robin Coxe 10 Feb '14

10 Feb '14

Hi. Since link2voip.com went kaput, I've been without a SIP trunking provider. Does anyone have any recommendations? I'd prefer a pay-as-you-go service over one with a monthly fee, since I use it sporadically for development. Thanks, Robin

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tcxo calibration / pps signal catch problem / end of burst does not work
by alex korolev 04 Feb '14

04 Feb '14

Hello, All! 1. I'm also (as Andrew Back) interested about calibration methods, but I can not find calibration technology description. How i can calibate device? 2. test_pps_input program failed with message: Using Device: Single USRP: Device: UmTRX Device Mboard 0: UMTRX-REV0 RX Channel: 0 RX DSP: 0 RX Dboard: A RX Subdev: LMS6002D (0xfa07) - 0 TX Channel: 0 TX DSP: 0 TX Dboard: A TX Subdev: LMS6002D (0xfa09) - 0 Attempt to detect the PPS and set the time... -- 1) catch time transition at pps edge Error: RuntimeError: Board 0 may not be getting a PPS signal! No PPS detected within the time interval. See the application notes for your device. Where i can get information about pps signal state and gps lock? (from device) 3. I found that eob (end of burst) metadata does not work, signal at spectrum analyzer is present, after sendind eob. How i can mute tx? thanks for answers ! :-) С уважением, alex korolev nik135(a)mail.ru

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umtrx_vcxo.py always reporting 2048.
by Andrew Back 30 Jan '14

30 Jan '14

Hello, I'm attempting to perform TCXO DAC calibration. However, whenever I run umtrx_vcxo.py it reports the current DAC value to be 2048, regardless of whether the GPS antenna is unplugged, or it is plugged in and GPS has a lock. I've updated the FPGA and ZPU firmware with those found at: http://people.osmocom.org/ipse/umtrx-v2/current/ But this doesn't seem to have made any difference. Is there anything else I can try? Cheers, Andrew -- Andrew Back http://carrierdetect.com

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LO leakage and I/Q balance calibration procedures.
by Andrew Back 29 Jan '14

29 Jan '14

Hello, Is there documentation somewhere, even if just an archived e-mail, of the processes you need to follow to carry out calibration for LO leakage and I/Q balance? Cheers, Andrew -- Andrew Back http://carrierdetect.com

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umtrx 'gpsdo' issue
by alex korolev 28 Jan '14

28 Jan '14

Hello, Alexander! A few days ago, you wrote that you know about the problem (issue) , tell me how to solve it ? С уважением, alex korolev nik135(a)mail.ru

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RF power problems with current master of osmo-trx
by Andreas Eversberg 25 Jan '14

25 Jan '14

hi, i experience problems with osmo-trx/umtrx. when i start osmo-trx, i get the following output: openbsc osmo-trx # /files/projects/gsm/osmo-trx/Transceiver52M/osmo-trx linux; GNU C++ version 4.5.4; Boost_104900; UHD_003.004.000-1b07671 Config Settings Log Level............... NOTICE Device args............. TRX Base Port........... 5700 TRX Address............. 127.0.0.1 Channels................ 1 Samples-per-Symbol...... 4 External Reference...... Disabled Diversity............... Disabled -- Opening a UmTRX device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes -- Setting UmTRX 4 SPS -- Transceiver active with 1 channel(s) i use current master. (an older version with branch umtrx_dual_test works with two TRX.) when i use RSSI test phone, i see that the RF power is high on TS0 and TS1 only. also it takes many tries to sync to it. i receive BCCH infos with some dropouts, but RACH is not received. i have no slotmask define at osmo-bts. any idea what causes it? regards, andreas

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umdesk problem
by alex korolev 20 Jan '14

20 Jan '14

Hello, All! Please, help me resolving problem with umdesk: 1. uhd_find_devices work: -------------------------------------------------- -- UHD Device 0 -------------------------------------------------- Device Address: type: umtrx addr: 192.168.135.35 name: UmTRX serial: 75 2. But uhd_usrp_probe fails: linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.004.000-unknown -- Opening a UmTRX device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes Error: resolve: Service not found I think the problem around eeprom(because led ZPU && FPGA is on), how i can reset it's value to default? Best regards, alex korolev nik135(a)mail.ru

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[RFC] [ADMIN] Making lists subscriber-only?
by Harald Welte 12 Jan '14

12 Jan '14

Dear all, so far the osmocom.org mailing lists have always been in a 'non-members are manually moderated' mode. This has created a lot of work for manual list moderation, where a lot of the messages caught are simply spam, and only the occasional valid message is being received. I'd like to thank the list moderators for taking care of this. However, in more recent discussions, we were considering to move the lists to a completely closed mode, i.e. postings would automatically be rejected from non-members. The automatic response would contain a description of how to subscribe in 'nomail' mode, i.e. to subscribe in a way to be able to post to the list, while still not receiving any incoming traffic. The latter should be fine for occasional posters who don't want the bulk e-mail that goes with a full/regular subscription. Please provide feedback in case you disagree with that change. Unless there is major opposition, we will likely transition to the 'closed' mode within one month. Thanks, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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osmo-bts-trx compilation
by stephane＠shimaore.net 28 Dec '13

28 Dec '13

Hello, I battled with osmo-bts-trx this afternoon; it didn't want to build with old (at least not any I tried) nor recent libosmocore, so I ended up using a chainsaw and cutting pieces out of it. The outcome is here: https://github.com/shimaore/osmo-bts You can see what I had to remove here: https://github.com/shimaore/osmo-bts/commit/b5ac1c000e6d7bea57f7c1d8d47f43f… This version builds with libosmocore etc `master` revisions.(*) Once compiled this gives me a piece of software that starts and prints out messages on the console, and apparently connects to the transceiver on one side, and to osmo-bsc on the other side. Anyhow, sending this out in hope this might save someone else a few hours. :} S. (*) The `abis` and `rsl` code are completely different in recent libosmocore, I suspect this build uses the old `abis` code embedded inside osmo-bts. The sysmo-bts code was updated, but not the trx-bts code. -- Stéphane Alnet -- Telecom Artisan. OpenSource Advocate. Development and integration for FreeSwitch, OpenSIPS, CouchDB, Node.js. Mobile: +33643482771 - http://shimaore.net/ - https://github.com/shimaore/

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