Hello, I am using two N310 USRP's to create an 8x8 MIMO setup. But, I am unable to make both of them work together. I am using an example program from the UHD driver - txrx_loopback_to_file.
I give the following command: ./txrx_loopback_to_file --tx-rate 7.68e6 --rx-rate 7.68e6 --tx-freq 2.60e9 --rx-freq 2.60e9 --tx-gain 70 --rx-gain 60 --tx-channels "0,1,2,3" --rx-channels "0,1,2,3" --tx-args "addr=192.168.10.2,second_addr=192.168.20.2,time_source=external,clock_source=external,master_clock_rate=122.88e6" --rx-args "addr=192.168.10.2,second_addr=192.168.20.2,time_source=external,clock_source=external,master_clock_rate=122.88e6" --settling 1 and only one USRP turns on. In USRP X300 there were two ways to use multiple USRP's, 1. Use --tx-args and --rx-args to specify "addr0,addr1" to access two different USRP's with --tx-channels and --rx-channels as "0,1". I tried that here but it gives an error, "Error message: Someone tried to claim this device again". 2. To define just one "addr" in --tx-args and --rx-args but have --tx-channels and --rx-channels as "0,1,2,3" (as X300 is 2x2). When tried with N310 with channel values "0,1,2,3,4,5,6,7" it gives an error that Tx channels invalid. So, could you tell me what is the correct syntax to access two USRP's? Thank you Neharika
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