Re: [Discuss-gnuradio] parallel data reception

[Josh Blum]

There is a handy dual_usrp wrapper in grc:
http://gnuradio.org/trac/browser/gnuradio/trunk/grc/src/grc_gnuradio/usrp/dual_usrp.py

You can use it like:
from grc_gnuradio import usrp as grc_usrp
grc_usrp.dual_source_c(......)

Or use the code as an example

-Josh

kaleem ahmad wrote:
> Hallo,
>
> We use following when there is only one RFX2400 daughter card (I think there
> is onle one subdev in RFX2400 card....Is it correct???).
>
> u = usrp_source(....)
>
> u.set_mux(usrp.determine_rx_mux_value(u, rx_subdev_spec))
>
>
> Can some one guide me how do I change it when two RFX2400 daughtercards are
> used.
>
> And what additional processing needs to be done to separate data streams
> from RX2 antennas of both 
> cards.
>
> Best Regards
>
>
>
>
> Jason Uher wrote:
> > > I am using USRP1 + RFX2400.
> > >
> > > You know there are two antenna ports on RFX2400 daughter card those are
> > > RX2,
> > > TX/RX. Is it possible to use both these ports in parallel for data
> > > reception. If yes then pelase provide me little clue how I should do it,
> > > or
> > > may be refer me to some existing example.
> > >
> > > I have two RFX2400 daughter cards and my problem is to use two different
> > > ports for data reception, it doesnt matter if I use two ports on a single
> > > card (i.e RX2, and RX/TX), or two ports on two different cards (e.g. RX2
> > > on
> > > each card). Please let me know which one is possible and easier to
> > > implement
> > > and please also refer me to some application where I can find relevant
> > > code.
> > I do not believe it is possible to receive data from the TX/RX and TX
> > port simultaneously, I believe the are tied to the same set of ADCs.
> > You should use two RFX cards if you are planning on doing MIMO
> > reception.  Check in the examples section, I don't think there is a
> > specific 2 antenna receive example with the 2400's; but there is a 4rx
> > fm receiver that you should be able to extrapolate from.
> >
> > Jason
> >
> >
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