Odd situation when runnning usrp_benchmark_usb.py and usrp_probe

Hi all,

I have gnuradio 3.3 installed in my laptop hp pavilion dv7-1020us with
ubuntu 9.10. I was trying to run the usrp_benchmark_usb.py with 2
RFX1800
installed and all I could get was RuntimeError: can’t open usrp, so I
tried
to change the daughterboards to two basic TX and one basic RX and it
worked
ok.

[email protected]:~/Desktop/gnuradio/gnuradio-examples/python/usrp$
./usrp_benchmark_usb.py
Testing 2MB/sec… usb_throughput = 2M
ntotal = 1000000
nright = 998255
runlength = 998255
delta = 1745
OK
Testing 4MB/sec… usb_throughput = 4M
ntotal = 2000000
nright = 1998065
runlength = 1998065
delta = 1935
OK
Testing 8MB/sec… usb_throughput = 8M
ntotal = 4000000
nright = 3995207
runlength = 3995207
delta = 4793
OK
Testing 16MB/sec… usb_throughput = 16M
ntotal = 8000000
nright = 7997570
runlength = 7997570
delta = 2430
OK
Testing 32MB/sec… usb_throughput = 32M
ntotal = 16000000
nright = 15991890
runlength = 15991890
delta = 8110
OK
Max USB/USRP throughput = 32MB/sec

Was I doing something wrong? The benchmark is meant to be run with the
basics daughterboards or it can be run with any daughterboards? I do
need to
use the RFX1800 for the openBTS testing.

I still got the same odd error. I don’t know what’s wrong. Now I’m
trying to
run usrp_probe to check the daughterboards and I got, I believe, the
same
error.
I have two RFX1800 daughterboards, when I plug them at the same time,
none
can be recognized by the usrp. I get this:

Error
can’t open usrp

If the USRP cannot be found, make sure that the USRP is plugged-in and
restart this program. If the problem persists, there may be a problem
with
you gnuradio installation or USB 2.0.

But if I unplug any of them I can read the results normally:

USRP Probe

Name:
Flex 1800 Rx MIMO B

Converter Rate:
64000000

Uses Quadrature:
True

Gain Range (min, max, step size):
0.0
90.0
0.0500000007451

Freq Range (min, max, step size):
1500000000.0
2100000000.0
1

Does anyone have a clue of what could cause this?

Thanks in advance for any answer,

Fernando R.

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