[Discuss-gnuradio] 2 RX and 1 TX channel

[kaleem ahmad]

Hello every one,

I am using USRP1 + RFX2400.

I want to use 2 RFX2400 cards. Overall I will have 2 RX streams and 1 TX
stream from this system. Following are main parts of my RX_Path (complete
code for RX-Path is also attached, if you want please have a look on that,
TX-path is not here). I am unable to receive anything from any of the
channels although the same RX-path was working when I was using a sinle
antenna. Only following lines were mainly changed. Please have a look and
let me know if my configuration for 2 RX (on separate RFX cards, but one
USRP1 main board) and one TX channel.


u = usrp.source_c(0, decim_rate=self.usrp_decim, nchan=2
self.subdev = (self.u.db[0][0] , self.u.db[1][0])
self.u.set_mux(gru.hexint(0x3210))  

#Set the gain to the midway point
self.subdev[0].set_gain(60)
self.subdev[1].set_gain(60)

#Set the recieve frequency
self.r0 = usrp.tune(self.u, 0, self.subdev[0], 2.41e9)
self.r1 = usrp.tune(self.u, 1, self.subdev[1], 2.41e9)

self.subdev[0].select_rx_antenna( 'RX2')        
self.subdev[1].select_rx_antenna( 'RX2')

self.deinter = gr.deinterleave(gr.sizeof_gr_complex)        

#enable Auto Transmit/Receive switching
self.set_auto_tr(True)

self.connect(self.u,self.deinter)
self.connect ((self.deinter,0), self.rx_filter, self.fmdemod, self.corr,
self.vec_sink) # One RX antenna for regular data reception
self.connect ((self.deinter,1), self.fft_input) #Other RX antenna for fft
window, this fft will be further processed

      
http://www.nabble.com/file/p24305532/receive_path.py receive_path.py 

Best Regards
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