I am absolutely stumped, any help with this would again be greatly
Last week I had a question trying to get USRP2 to work in my MAC
decided not to worry about that for the time being and borrowed 2 USRP1s
from another research group to finish a project. However, I am not
to get benchmark_tx/rx.py or obviously tunnel.py to work with these
I have hundreds of times before with the other USRPs.
My first 2 USRP1 are Rev 4.5.
I have 4 RFX2400 Rev 30, tested all successfully on 4.5.
USRP1s in question are Rev 4.3.
GNU Radio 3.3.2
The Rev 4.3 transmits a waveform that appears on rev 4.5 FFT as a good
(tried dbpsk also) signal. I set the TX amplitude to 5000 and RX gain
30, but have tried many many values. The rev 4.3 will not successfully
decode the rev 4.5 signal either.
Literally when I swap the USRPs out with the exact same set up, it works
with rev 4.5 boxes. I have tested the usrp 4.3s including FFT, siggen,
and everything else seems fine other than packet decode and correct
transmitting. I also tried RFX900’s between those two with no avail.
I’ve tried all the parameters I could think. Do I need to use a
older GR revision? Special decimation, interpolation, samples/symbol,
As a side note: the simple reliable MAC I have implemented which
RTS/CTS (w/ threshold), ACK, multi-hop, multiframe transmit is working
(so far). I look forward to publishing it for the community when I