UmTRX February 2014

umtrx@lists.osmocom.org

4 participants
5 discussions

Re: tx signal jitter
by Alexander Chemeris 20 Feb '14

20 Feb '14

Alex, On Thu, Feb 20, 2014 at 11:33 AM, alex korolev <nik135(a)mail.ru> wrote: > When i exec 'tx_waveforms.exe --wave-type SINE --wave-freq=100000 > --freq=300000000 --rate 1000000 --bw 20000 --ampl 0.7' I get a sine wave at > the desired frequency, but it have a jitter. > It is a normal behavior? Most likely this is fine. Check spectrum picture with a spectrum analyzer to see if there is any noise which might cause this. > The little jpeg attached :-) It's an avi, not a jpeg ;) > ps. I have not found information on calibration, > tell me how to make sure that the device is calibrated?? We're preparing a short manual about the calibration. Skilled and impatient could refer to the LMS6002D calibration guide for details. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

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no process found
by Manoel Aposaz 11 Feb '14

11 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?

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

10 Feb '14

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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 February 2014