Re: [Openbts-discuss] UMTS Bad Waveform

[Ralph A. S. d. <ra...@sc...>]

A good source for band information and ARFCNs is this link:

 

http://niviuk.free.fr/

 

Ralph.

 

 

From: Harvind Samra [mailto:ha...@ra...] 
Sent: Thursday, February 12, 2015 8:17 PM
To: Tim Blake
Cc: ope...@li...
Subject: Re: [Openbts-discuss] UMTS Bad Waveform

 

Tim, 

 

See: http://en.wikipedia.org/wiki/UMTS_frequency_bands

 

The 850 band is "Band 5" on this chart, and corresponds to UARFCNs 4437 to
4458.  The code might be barfing on the UARFCN 5780.

 

Harvind Samra

Founder, CTO

Range Networks

San Francisco, CA  

 

 <https://twitter.com/rangenetworks> Twitter - Follow @RangeNetworks for the
latest.

____________________________________________

 

Cellular networks made simple and affordable.  

http://www.rangenetworks.com <http://www.rangenetworks.com/> 

____________________________________________

 

 

 

 

On Feb 12, 2015, at 11:09 AM, Tim Blake <tbl...@ou...
<mailto:tbl...@ou...> > wrote:

 

I have verified that with the default band and UARFCN settings, the waveform
looks correct.  However, changing the band and channel via devconfig results
in incorrect waveform production.

Setting the band to 850 and the UARFCN to 5780 as in the screenshots must be
done with the rawconfig command because the system returns that these are
incorrect values however, they are not.  I suspect this has something to do
with the band capabilities of the current release.  Are the 850 and 1900
bands within the capabilities of this release?  How would one go about
configuring UARFCN 5780?

Thanks,
Tim


------------------------------


  _____  


From: tbl...@ou... <mailto:tbl...@ou...> 
To: to...@ts... <mailto:to...@ts...> 
CC: ope...@li...
<mailto:ope...@li...> 
Subject: RE: [Openbts-discuss] UMTS Bad Waveform
Date: Thu, 12 Feb 2015 09:14:01 -0500

Hi Tom,

I have verified that I can transmit at the selected frequency (877mhz) and
the power settings are good.  What log are you talking about?  

Tim


------------------------------

> Date: Tue, 10 Feb 2015 18:00:51 -0800
> Subject: Re: [Openbts-discuss] UMTS Bad Waveform
> From: to...@ts... <mailto:to...@ts...> 
> To: tbl...@ou... <mailto:tbl...@ou...> 
> CC: ope...@li...
<mailto:ope...@li...> 
> 
> On Tue, Feb 10, 2015 at 5:09 PM, Tim Blake <tbl...@ou...
<mailto:tbl...@ou...> > wrote:
> > Here is a screenshot of the same signal with the improved SA settings.
> > Something is definitely wrong.
> >
> > https://onedrive.live.com/redir?resid=AF7BB757AB4CF78!215950
<https://onedrive.live.com/redir?resid=AF7BB757AB4CF78!215950&authkey=!AMb1E
OdRyFndrlE&v=3&ithint=photo%2cjpg>
&authkey=!AMb1EOdRyFndrlE&v=3&ithint=photo%2cjpg
> 
> That looks like an empty carrier. What is your downlink power setting?
> Anything noticeable in the log?
> 
> Try verifying that you can transmit at the target frequency. You can
> do that with the tx_waveforms utility. Adjust frequency and gain
> accordingly.
> 
> $ /usr/local/lib/uhd/examples/tx_waveforms --freq 1e9 --rate 6.25e6 --gain
20
> 
> -TT

----------------------------------------------------------------------------
--
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now.
<http://goparallel.sourceforge.net/_________________________________________
______>
http://goparallel.sourceforge.net/__________________________________________
_____
Openbts-discuss mailing list
 <mailto:Ope...@li...>
Ope...@li...
 <https://lists.sourceforge.net/lists/listinfo/openbts-discuss>
https://lists.sourceforge.net/lists/listinfo/openbts-discuss