Re: [Discuss-gnuradio] Mobile can not access to the OpenBTS

[David Burgess]

That low power level does not sound right.  The power level at the tx  
connector should be around 20 dBm.

Note the we recommend terminating the transmit connector to prevent  
unlawful emissions.  Plenty of power leaks out of the USRP for  
desktop testing, even with a termination.  Absolutely do not use any  
kind of amplifier unless you are licensed to do so.

Are you sure you are checking the correct connector on the correct  
board?

Also, you can subscribe to an OpenBTS-specific discussion list:

address@hidden

Since the lifting of the injunction that list is now public, so you  
can subscribe yourself.  You can find several users there with  
successful, running OpenBTS systems.

-- David



On Aug 2, 2009, at 7:00 PM, jimmyzhang wrote:

>      We use USRP and 2 RFX900 boards without ISM band filter.All the
> necessary software are installed.
> We found the power of the TX antenna was very low,which was  
> -48dbm.There are
> questions we need your  help to answer.
>     1、Do we need a Power amplifier? What kind of Power amplifier  
> is suitble
> for us?
>     2、Is there some limitation of Mobile which can access to the  
> OpenBTS?
>
>      Thank you for your attention and your help!
> --
> View this message in context: http://www.nabble.com/Mobile-can-not- 
> access-to-the-OpenBTS-tp24784065p24784065.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
>
>
>
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David A. Burgess
Kestrel Signal Processing, Inc.