Hey
I am working on USRP N200 with RFX2400. My set up includes two USRPs
connected to two computers. I want them to communicate using
uhd_benchmark_tx/rx.py codes. Initially I set up my receiver side by running
uhd_benchmark_rx.py and it's done! The I shift to transmitter side and run
uhd_benchmark_tx.py. It starts to transmit ( it is shown on window as
........................................ ) but I cannot receive anything on
receiver window. So, my Question is what I am transmitting is correct or not
? If yes, then why not I am able to receive anything on receiver side.
This is how it looks on both the sides.
RECEIVER :
aravind@COE-2X85V91:~/gnuradio/gnuradio-examples/python/uhd_benchmark$
./uhd_benchmark_rx.py -m gmsk -r 500k -v -S 2 --rx-freq=242M -F 10
linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.001.002-ba0e3c8
receiver:
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
-- mboard0 is MIMO master
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
RX antenna: TX/RX
USRP Source: <gr_block gr uhd usrp source (2)>
Samplerate: 250000.0
UHD Warning:
The hardware does not support the requested RX frequency:
Target frequency: 242.000000 MHz
Actual frequency: 2342.000000 MHz
UHD Warning:
The hardware does not support the requested RX frequency:
Target frequency: 242.000000 MHz
Actual frequency: 2342.000000 MHz
>>> gr_fir_fff: using SSE
bits per symbol = 1
M&M clock recovery omega = 2.000000
M&M clock recovery gain mu = 0.175000
M&M clock recovery mu = 0.500000
M&M clock recovery omega rel. limit = 0.005000
frequency error = 0.000000
Receive Path:
modulation: gmsk_demod
bitrate: 500kb/s
samples/symbol: 2.0000
Warning: Failed to enable realtime scheduling.
TRANSMITTER:
aravind@COE-CW85V91:~/gnuradio/gnuradio-examples/python/uhd_benchmark$
./uhd_benchmark_tx.py -m gmsk --size=100 -M 1 -r 500k --tx-amplitude=0.5 -v
-S 2 --tx-freq=242M -F 10
linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.001.002-5239879
sender:
-- 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: 131071 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: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
-- mboard0 is MIMO master
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
TX antenna: TX/RX
USRP Sink: <gr_block gr uhd usrp sink (2)>
sampling frequency: 1M
UHD Warning:
The hardware does not support the requested TX frequency:
Target frequency: 242.000000 MHz
Actual frequency: 4442.000000 MHz
UHD Warning:
The hardware does not support the requested TX frequency:
Target frequency: 242.000000 MHz
Actual frequency: 4442.000000 MHz
>>> gr_fir_fff: using SSE
bits per symbol = 1
Gaussian filter bt = 0.35
Tx amplitude 0.5
modulation: gmsk_mod
bitrate: 500kb/s
samples/symbol: 2.0000
Warning: failed to enable realtime scheduling
...........U....................................................................................................................................................
Thanks in advance
--
Saketh Kumar
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