Re: [Openbts-discuss] Device doesn't see network at all (openbts-uhd + usrp2 + wbx)

[Alexander C. <ale...@gm...>]

I think Kal is not ported to non 52 MHz configuration and doesn't work
with USRP2 - that's why you see this error about incorrect frequency.
Correct me if I'm wrong.

2011/6/10 Љубомир Самарџић <lj...@gm...>:
> Also, one note:
> when I tried to start kal, to perform gsm scan over 900 band, it promts
> these messages:
>
> UHD Warning:
>     The hardware does not support the requested RX sample rate:
>     Target sample rate: 0.270833 MSps
>     Actual sample rate: 0.271739 MSps
>
> And then continues to work and never ends. I left it once for an hour, maybe
> more, and nothing prompted back.
>
> Cheers,
> Ljubomir
>
> 2011/6/9 Thomas Tsou <tt...@vt...>
>>
>> 2011/6/9 Љубомир Самарџић <lj...@gm...>:
>> > Hi everybody,
>> >
>> > As title says, I'm dealing with that problem ... :)
>> >
>> > I'm running openbts-uhd (currently head revision from git - commit:
>> > d186353546d29032759f17872224187b736439dc).
>> > The version of uhd driver is also currently fresh (commit
>> > e625e890f5f341e4e93bec46a5279a96523a7b24), (libuhd.so.003.001 with
>> > appropriate images on usrp2 as well)
>> >
>> > The problem is that the OpenBTS network is not visible at all, on any
>> > tested
>> > device (several Nokia phones and one HTC). Tried gsm900 and gsm1800
>> > bands,
>> > several arfcns...
>>
>> One of the more recent changes is the enabling of automatic transmit
>> gain, which formerly only existed on the 52MHz transceiver. The config
>> values GSM.PowerManager.MaxAttenDB and GSM.PowerManager.MinAttenDB
>> control the minimum and maximum transmit power respectively. The
>> default configuration starts at 30dB attenuation, which only provides
>> minimal range, but the transmit power will ramp up as time progresses.
>>
>> You can view the current transmit power (attenuation) by typing
>> 'power' at the OpenBTS prompt.
>>
>> Have you tried manual network search and selection on your phone? Have
>> you read the phone camping page on the wiki?
>>
>> http://gnuradio.org/redmine/wiki/gnuradio/OpenBTSMS_Camping
>>
>> > Also, I skipped asterisk instalation completely at this point. My
>> > thoughts
>> > were that network should be visible no matter what happens with
>> > Asterisk.
>>
>> You are correct. If your phone cannot detect the network, than you can
>> ignore Asterisk installation at this point.
>>
>>  Thomas
>
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-- 
Regards,
Alexander Chemeris.