Re: [Openbts-discuss] Running OpenBTS with GPSDO as external

[Simon P. <sim...@st...>]

Hi again,

Do you think I should revert my UHD to an earlier version? If so, which
version do you recommend?

Or is it a better idea to make the correct changes in the Transceiver52M?
In that case, where should these changes be done? Is it in
USRPDevice::open(...), USRPDevice::start(...), or is there another place
more suited for this?

Sorry for all the questions but I'm a novice at UHD and OpenBTS.

Best regards
/Simon

2016-03-15 10:11 GMT+01:00 Simon Pålstam <sim...@st...>:

> HI Neel
>
> I'm using UHD 3.9.2 and Transciever52M from openBTS 5.0 (master/origin).
> There seem to be a commit by Tom Tsou in Transceiver52M/UHDDevice.cpp that
> compensate for the new FIR filters in UHD 3.9. Although I did not find any
> changes concerning the clock source, but maybe I overlooked it.
>
> /Simon
>
> 2016-03-14 19:40 GMT+01:00 Neel Pandeya <nee...@et...>:
>
>> Hello Simon Pålstam:
>>
>> Also note that in UHD 3.9.x, the selection of the GPSDO as the timing and
>> clocking source is no longer automatic, and must be made explicitly. I
>> don't remember if the TransceiverUHD and OsmoTRX transceiver processes
>> already include code for doing this. Which version of UHD are you using?
>> Which transceiver are you using, and which version?
>>
>> +*Tom* *Tsou*: Could you please comment further on this? Thanks in
>> advance for your help.
>>
>> --Neel
>>
>>
>> On 11 March 2016 at 13:43, Daigle, Frédéric <fd...@cm...>
>> wrote:
>>
>>> Hi Robert,
>>>
>>> You need to type the command bellow in OpenBTSCLI
>>>
>>> rawconfig TRX.Reference 1
>>>
>>> Frédéric
>>>
>>> ________________________________________
>>> De : Robert Light <rob...@gm...>
>>> Envoyé : 10 mars 2016 11:11
>>> À : ope...@li...
>>> Objet : Re: [Openbts-discuss] Running OpenBTS with GPSDO as external
>>>
>>>
>>> OpenBTS has a config key that you have to configure for Openbts to use
>>> external reference.
>>> Robert
>>>
>>>  Date: Thu, 10 Mar 2016 11:19:38 +0100
>>>  From: Simon P?lstam <
>>> ​​
>>> sim...@st...>
>>>  Subject: [Openbts-discuss] Running OpenBTS with GPSDO as external
>>>  reference on USRP B210
>>>
>>>
>>>  Hi, I am trying to set up OpenBTS on a B210 and has run into problems
>>> with
>>>  cellphones that do not connect. I have think that the problem probably
>>> has
>>>  to do with a bad clock. To solve this problem I have now installed a
>>> GPSDO
>>>  on the B210 to use as external reference.
>>>
>>>  Is there any configurations that I need to do in UHD or OpenBTS for the
>>>  system to use the GPSDO? Or will it use GPSDO automatically after it is
>>>  installed?
>>>
>>>  I would also like to know if there is a way to confirm if the GPSDO is
>>>  currently in use and if it is locked to GPS a satellite?
>>>
>>>  Thanks for any help!
>>>
>>>  /Simon
>>>
>>>
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>>
>>
>