nchan is already a block parameter (nchan=1 in your grc), and it's added for you as numchan, as seen in the args in your error message.
After trying everything else, I deleted the spaces from the args and the error went away! On Sat, Jul 17, 2021 at 2:41 PM Ellie White <elliewhite1...@gmail.com> wrote: > Hi all, > > I hope you're doing well and having a good weekend. I had a question I > thought someone here might be able to answer; I'm attempting to get an > AirSpy dongle to work properly with GNU Radio but am running into some > issues. I attempted to install the right dependencies for the AirSpy ( > https://github.com/airspy/airspyone_host) and then installed the > gr-osmosdr module (the gr-3.8 branch, as I still have GNURadio 3.8 > installed), but when I put "airspy=0, bias=1, pack=0" in the "Device > Arguments" field of my osmocom Source block and tried running my flowgraph, > it gives me the following output: > > Generating: '/home/ellie/src/gr-ata/examples/usrp_2chrx.py' > > Executing: /usr/bin/python3 -u > /home/ellie/src/gr-ata/examples/usrp_2chrx.py > > linux; GNU C++ version 7.3.0; Boost_106501; UHD_003.010.003.000-0-unknown > > Traceback (most recent call last): > File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 267, in > <module> > main() > File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 243, in main > tb = top_block_cls(fc=options.fc, gaindB=options.gaindB, > samp_rate=options.samp_rate, src_name=options.src_name, > timestamp=options.timestamp) > File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 131, in > __init__ > args="numchan=" + str(1) + " " + 'airspy=0, bias=1, pack=0, nchan=1' > File "/usr/lib/python3/dist-packages/osmosdr/osmosdr_swig.py", line > 1170, in make > return _osmosdr_swig.source_make(*args, **kwargs) > RuntimeError: Wrong device arguments specified. Missing nchan? > > I also tried adding "nchan=1" to the "Device Arguments" field but that > didn't work either and resulted in the same error. I've attached my > flowgraph for reference. (Note that I made sure my AirSpy dongle was > plugged in before running it). Any ideas you might have on how to solve > this would be much appreciated, thanks in advance! > > Cheers, > Ellie > > -- > Ellie White (she/her) > 304-654-9381 > Physics Major / Student Researcher > Marshall University > >
