Langstone Discussion Forum

[g8gtz]

I bought the "approved" USB audio device but get the no frequency display error - tried another device but still the same.

Any chance of a log file or error display to show what the problem is?

73
Noel

[g4eml]

Hi Noel

This is from memory, so might not be 100% accurate!

SSH into the Pi.
cd Langstone
python SSB_TRX.py


That will try to run the SDR part on its own. You should see any error messages from GNU Radio.

If it works the audio device should start flashing.


Colin.

[g0mjw]

That's right. I can talk you through it after work Noel and how to fix if you have something else - e.g. another audio device might interfere.

[g8gtz]

OK - get the following:

ERROR: Unable to find host: Name or service not known
Traceback (most recent call last):
File "SSB_TRX.py", line 332, in <module>
main()
File "SSB_TRX.py", line 325, in main
tb = top_block_cls()
File "SSB_TRX.py", line 55, in __init__
self.pluto_source_0 = iio.pluto_source('ip:192.168.2.1', BaseFreq, 529200, 2000000, 0x800, True, True, True, "slow_attack", 64.0, '', True)
File "/usr/lib/python2.7/dist-packages/gnuradio/iio/iio_pluto_source_swig.py", line 126, in make
return _iio_pluto_source_swig.pluto_source_make(*args, **kwargs)
RuntimeError: Unable to create context

[G8GKQ]

That looks like it can't find the Pluto to me, but I'm not good at this Python stuff....

Dave

[g0mjw]

Yes - it's not seeing the pluto

[g8gtz]

I did think that but wasn't sure.

Anyway just tried another USB lead and it works

Noel

[g0mjw]

The Pluto normally comes with a high quality USB lead with RF chokes on it. Best use that.

Mike

[g4eml]

Hi Noel,

Glad you got it working. I have been busy in the garden this afternoon so only just checked the forum.

When I get a chance I will add some more debugging to the start process.

Colin.

[g8gtz]

Yes - I seem to have a shortage of good micro usb leads (like only 2 in the shack) and I either get the yellow PSU flash or no Pluto!

Got 10's of Mini leads as used on MiniTiouner as I use them for programming the modules!

Anyway - looks like we're getting there

73
Noel