GSM @ Camp 2011 preparations

This is merely a historical archive of years 2008-2021, before the migration to mailman3.

A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/OpenBSC@lists.osmocom.org/.

Harald Welte laforge at gnumonks.org
Thu Jul 21 20:27:06 UTC 2011


Hi Konrad,

On Mon, Jul 18, 2011 at 04:22:19PM +0200, Konrad Meier wrote:

> I have two "SPLIT2P-SMA" from "Global Professional" [1]. My Idea was
> to use these two units with one naoBTS-Booster like shown here: [2]
> [2] http://lab.ks.uni-freiburg.de/attachments/download/260/setup.png

Reading that diagram: What ist the "combiner" ?  Are you suggesting to
use a "SPLIT2P-SMA" for that purpose?  I'd strongly discourage, as you
would still get a lot of Tx power leakage from nanoBTS1 into the
amplifier of nanoBTS2.  I doubt that they would like that.

The alternative here really would be to use one of my hybrid
combiner/duplexers in place.  We simply ignore the Rx path and use it to
combine the Tx path of the two BTS before feeding into the amplifier.

> We have two omnidirectional antennas from PROCOM: CXL 1800-3
> More information: [3]
> 
> >Also, when would you be able to provide the equipment to me?  I would
> >want to put everything together + test it well ahead of the camp,
> >probably around August 1st.
> 
> Ok, I will see what I can do.

Has there been any news on this?  I think we would definitely like to
make use of your 2 nanoBTS boosters, even if we can only use each of
them with a single TRX setup.

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)




More information about the OpenBSC mailing list