address@hidden:~/Desktop/gnuradio/gr-digital/les/narrowband$ ./benchmark_tx.py -f 300M --from-file=pic.jpg
linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-128-g12f7a5c9
>>> gr_fir_ccf: using SSE
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The send buffer could not be resized sufficiently.
Target sock buff size: 1048576 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.wmem_max=1048576
UHD Warning:
Unable to set the thread priority. Performance may be negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
No gain specified.
Setting gain to 17.500000 (from [0.000000, 35.000000])
UHD Warning:
The hardware does not support the requested TX frequency:
Target frequency: 300.000000 MHz
Actual frequency: 4500.000000 MHz
UHD Warning:
The hardware does not support the requested TX sample rate:
Target sample rate: 0.050000 MSps
Actual sample rate: 0.195312 MSps
Symbol Rate: 25000.000000
Requested sps: 2.000000
Given sample rate: 195312.500000
Actual sps for rate: 7.812500
Requested sample rate: 50000.000000
Actual sample rate: 195312.500000
Using Volk machine: avx_32
Warning: failed to enable realtime scheduling
.........................................................................
address@hidden:~/Desktop/USRP/gnuradio/gr-digital/examples/narrowband$ ./benchmark_rx.py -f 300M
linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.001-129-g23344268
>>> gr_fir_ccf: using SSE
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The send buffer could not be resized sufficiently.
Target sock buff size: 1048576 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.wmem_max=1048576
UHD Warning:
Unable to set the thread priority. Performance may be negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
No gain specified.
Setting gain to 49.500000 (from [0.000000, 99.000000])
UHD Warning:
The hardware does not support the requested RX frequency:
Target frequency: 300.000000 MHz
Actual frequency: 2400.000000 MHz
UHD Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 0.050000 MSps
Actual sample rate: 0.195312 MSps
Symbol Rate: 25000.000000
Requested sps: 2.000000
Given sample rate: 195312.500000
Actual sps for rate: 7.812500
Requested sample rate: 50000.000000
Actual sample rate: 195312.500000
Warning: Failed to enable realtime scheduling.
Using Volk machine: ssse3_32
ok = False pktno = 3850 n_rcvd = 1 n_right = 0
ok = False pktno = 53042 n_rcvd = 2 n_right = 0
ok = False pktno = 61454 n_rcvd = 3 n_right = 0
ok = False pktno = 27 n_rcvd = 4 n_right = 0
ok = False pktno = 41 n_rcvd = 5 n_right = 0
ok = False pktno = 44 n_rcvd = 6 n_right = 0
ok = False pktno = 44 n_rcvd = 7 n_right = 0
ok = False pktno = 51 n_rcvd = 8 n_right = 0
ok = False pktno = 43 n_rcvd = 9 n_right = 0
ok = False pktno = 64 n_rcvd = 10 n_right = 0
I am using two USRP N210.