UmTRX January 2014

umtrx@lists.osmocom.org

7 participants
6 discussions

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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UmTRX January 2014