Mobile can not access to the OpenBTS

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
questions we need your help to answer.
1、Do we need a Power amplifier? What kind of Power amplifier is
for us?
2、Is there some limitation of Mobile which can access to the

 Thank you for your attention and your help!

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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

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

[email protected]

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:

2、Is there some limitation of Mobile which can access to the  

Discuss-gnuradio mailing list
[email protected]

David A. Burgess
Kestrel Signal Processing, Inc.

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