I am working with a USRP1. I eventually will want to transmit and
receive data packets between USRP1s, but right now I am getting to grips
with the system.
I am currently trying out the benchmark_tx, benchmark_rx programs.
I call benchmark_rx on my USRP1’s LFRX-LF daughterboard and leave it
running,
sudo python benchmark_rx.py -f 10M -R A --rx-gain=70 -v -r 500k -d 128
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:
Using RX d’board A: Flex 2400 Rx MIMO B
Rx gain: 70
modulation: gmsk_demod
bitrate: 250kb/s
samples/symbol: 2
decim: 128
Rx Frequency: 10M
I then call benchmark_tx on my USRP1’s LFTX-LF daughterboard,
sudo python benchmark_tx.py -TA -f 10M -r 500k -v --tx-amplitude=20000
gr_fir_fff: using SSE
bits per symbol = 1
Gaussian filter bt = 0.35
Using TX d’board A: Flex 2400 Tx MIMO B
Tx amplitude 20000.0
modulation: gmsk_mod
bitrate: 500kb/s
samples/symbol: 2
interp: 128
Tx Frequency: 10M
This prints out … etc signifying packets are apparently being
transmitted.
However when I flip over to the benchmark_rx console no packet
notifications are being displayed.
Is the USRP transmitting data? Why is it not receiving this data if it
is transmitting?
Furthermore is there a test/example program just for testing whether the
USRP is transmitting through its antenna? For instance a program that
gets the USRP to produce an audible tone out of its antenna?