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

[Љубомир С. <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
>