TRX Clock calibration

This is merely a historical archive of years 2008-2021, before the migration to mailman3.

A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/OpenBSC@lists.osmocom.org/.

choukoumoun choukoumoun at gmail.com
Wed Jul 16 00:53:30 UTC 2014




-------- Message original --------
Sujet: 	Re: TRX Clock calibration
Date : 	Wed, 16 Jul 2014 02:52:33 +0200
De : 	choukoumoun <choukoumoun at gmail.com>
Pour : 	Alexander Chemeris <alexander.chemeris at gmail.com>



Le 16/07/2014 02:46, Alexander Chemeris a écrit :
> Choukoumoun,
>
> The question is related to the osmo-trx more than to UmTRX, so I'm
> moving it to the Osmocom mailing list:
>
> On Tue, Jul 15, 2014 at 8:17 PM, choukoumoun <choukoumoun at gmail.com> wrote:
>> Hello guys.
>>
>> I have a UMTRX my UHD/OPENBTS or UHD/OSMO-TRX same working fine but wen i
>> start osmo-trx and openbts i have this error
> Could you specify where did you get sources and which exact versions
> and commit numbers do you use?
>
> Did you try to use osmo-trx with Osmocom software rather than with OpenBTS?
>
>> Osmo-trx :
>>
>> linux; GNU C++ version 4.8.1; Boost_105300; UHD_003.004.000-4fa97a1
>>
>> Config Settings
>>     Log Level............... NOTICE
>>     Device args............. addr=192.168.10.2
>>     TRX Base Port........... 5700
>>     TRX Address............. 127.0.0.1
>>     Channels................ 1
>>     Samples-per-Symbol...... 4
>>     External Reference...... Disabled
>>     C0 Filler Table......... Disabled
>>     Diversity............... Disabled
>>     Tuning offset........... 0
>>
>> -- 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)
>>
>> ALERT 139940970051328 02:13:33.7 UHDDevice.cpp:993:writeSamples: UHD: Device
>> send timed out
>> "Constantely" .....
>>
>>
>> anybody have a idea ?
>>
>>
>> my usrp probe out :
>>
>> linux; GNU C++ version 4.8.1; Boost_105300; UHD_003.004.000-4fa97a1
>>
>> -- Opening a UmTRX device...
>> -- Current recv frame size: 1472 bytes
>> -- Current send frame size: 1472 bytes
>>    _____________________________________________________
>>   /
>> |       Device: UmTRX Device
>> |     _____________________________________________________
>> |    /
>> |   |       Mboard: UMTRX-REV0
>> |   |   hardware: 64000
>> |   |   mac-addr: 00:50:c2:85:3f:ff
>> |   |   ip-addr: 192.168.10.2
>> |   |   gpsdo: none
>> |   |   serial: 7
>> |   |   name: UmTRX
>> |   |   tcxo-dac: 2048
>> |   |
>> |   |   Time sources: none, external, _external_, mimo
>> |   |   Clock sources: internal, external, mimo
>> |   |   Sensors: ref_locked
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       RX DSP: 0
>> |   |   |   Freq range: -6.500 to 6.500 Mhz
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       RX DSP: 1
>> |   |   |   Freq range: -6.500 to 6.500 Mhz
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       RX Dboard: A
>> |   |   |   ID: LMS6002D (0xfa07)
>> |   |   |   Serial: 7.A
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       RX Subdev: 0
>> |   |   |   |   Name: LMS6002D (0xfa07) - 0
>> |   |   |   |   Antennas: RX0, RX1, RX2, RX3, CAL
>> |   |   |   |   Sensors: lo_locked
>> |   |   |   |   Freq range: 232.500 to 3720.000 Mhz
>> |   |   |   |   Gain range VGA1: 0.0 to 126.0 step 1.0 dB
>> |   |   |   |   Gain range VGA2: 0.0 to 30.0 step 3.0 dB
>> |   |   |   |   Connection Type: IQ
>> |   |   |   |   Uses LO offset: No
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       RX Codec: A
>> |   |   |   |   Name: LMS_RX
>> |   |   |   |   Gain Elements: None
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       RX Dboard: B
>> |   |   |   ID: LMS6002D (0xfa07)
>> |   |   |   Serial: 7.B
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       RX Subdev: 0
>> |   |   |   |   Name: LMS6002D (0xfa07) - 0
>> |   |   |   |   Antennas: RX0, RX1, RX2, RX3, CAL
>> |   |   |   |   Sensors: lo_locked
>> |   |   |   |   Freq range: 232.500 to 3720.000 Mhz
>> |   |   |   |   Gain range VGA1: 0.0 to 126.0 step 1.0 dB
>> |   |   |   |   Gain range VGA2: 0.0 to 30.0 step 3.0 dB
>> |   |   |   |   Connection Type: IQ
>> |   |   |   |   Uses LO offset: No
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       RX Codec: B
>> |   |   |   |   Name: LMS_RX
>> |   |   |   |   Gain Elements: None
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       TX DSP: 0
>> |   |   |   Freq range: -6.500 to 6.500 Mhz
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       TX DSP: 1
>> |   |   |   Freq range: -6.500 to 6.500 Mhz
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       TX Dboard: A
>> |   |   |   ID: LMS6002D (0xfa09)
>> |   |   |   Serial: 7.A
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       TX Subdev: 0
>> |   |   |   |   Name: LMS6002D (0xfa09) - 0
>> |   |   |   |   Antennas: TX0, TX1, TX2, CAL
>> |   |   |   |   Sensors: lo_locked
>> |   |   |   |   Freq range: 232.500 to 3720.000 Mhz
>> |   |   |   |   Gain range VGA1: -35.0 to -4.0 step 1.0 dB
>> |   |   |   |   Gain range VGA2: 0.0 to 25.0 step 1.0 dB
>> |   |   |   |   Connection Type: IQ
>> |   |   |   |   Uses LO offset: No
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       TX Codec: A
>> |   |   |   |   Name: LMS_TX
>> |   |   |   |   Gain Elements: None
>> |   |     _____________________________________________________
>> |   |    /
>> |   |   |       TX Dboard: B
>> |   |   |   ID: LMS6002D (0xfa09)
>> |   |   |   Serial: 7.B
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       TX Subdev: 0
>> |   |   |   |   Name: LMS6002D (0xfa09) - 0
>> |   |   |   |   Antennas: TX0, TX1, TX2, CAL
>> |   |   |   |   Sensors: lo_locked
>> |   |   |   |   Freq range: 232.500 to 3720.000 Mhz
>> |   |   |   |   Gain range VGA1: -35.0 to -4.0 step 1.0 dB
>> |   |   |   |   Gain range VGA2: 0.0 to 25.0 step 1.0 dB
>> |   |   |   |   Connection Type: IQ
>> |   |   |   |   Uses LO offset: No
>> |   |   |     _____________________________________________________
>> |   |   |    /
>> |   |   |   |       TX Codec: B
>> |   |   |   |   Name: LMS_TX
>> |   |   |   |   Gain Elements: None
>>
>>
>> I make the VCXO configuration procedure with the GPS but no success...
> The issue with "UHD: Device send timed out" have nothing to do with
> the VCXO calibration. The issue is because of a issue in communication
> between the host system and the UmTRX.
>
> What is your hardware setup? Particularly:
>   - Do you use a switch between the UmTRX and the host system?
Nop my laptop is connected directly of the umtrx
>   - Do you run it on a real hardware or in a VM?
real ubuntu 13.04 64 bits
>   - Is your host system powerful enough?
Intel Core I5, 8Gb ram

>



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/openbsc/attachments/20140716/906a26cc/attachment.htm>


More information about the OpenBSC mailing list