Re: [Discuss-gnuradio] mutiple signals with the usrp

[Francesco B.]

I am also trying to implement full duplex. And are you certain
usrp_nbfm_ppt.py operates full duplex?  It appears to only enable TX or RX
at any given time, which is half duplex, not full duplex.

~ Francesco


Matt Ettus wrote:
> 
> Josh Blum wrote:
>> Hello,
>>
>> I am interested in sending and receiving multiple signals (2 or more?)
>> with a single USRP.
>>
>> It seems that to transmit 2 signals to different daughter boards you
>> can interleave the signals, set up 2 subdevices, and do a
>> self.u.set_mux(0xba98) (i pulled this from the
>> fm_tx_2_daughterboards.py example).
> 
> yes.
> 
>>
>> I assume that receiving 2 signals would be very similar, perhaps a
>> different hex value for set_mux?
> 
> yes, the mux values are different, but should be set automatically.
> 
>> What if I choose to transmit (or receive) those signals on 2 different
>> subdevices of the same daughter board, is the code the same?
>>
>> Transmitting and receiving at the same time using one USRP does not
>> seem to fit into this model. Is the correct way to create a USRP
>> source and sink in the same flow graph? This may or may not be
>> obvious, but my initial attempt failed and I was already sore from
>> trying to receive 2 signals at once.
> 
> See the usrp_nbfm_ppt.py example.  It operates full duplex.
> 
> Matt
> 
> 
> 
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