Christoph

Can you try this: (in gr-kiwisdr)
mkdir build
cd build
cmake ../
make install

It's great you are looking into this.

Here is a link to a manual for sox: sox.sourceforge.net/sox.html

The following command resamples a wav file to 6000 Hz:
sox 20190124T151751Z_77000_iq.wav output.wav rate 6000

Hi @WA2ZKD,

For sure the documentation can be improved. But for this you would need to be more specific: what exactly is for you/the user you imagine not clear/missing/etc.?

73
Christoph

Hi @rrobinet

I have a fix for these crashes, waiting for @jks to merge them into his fork of kiwiclient.

These crashes were caused by changes for python2/python3 compatibility.

This is great work!

I remember that besides the MSK signals you have mentioned also DHO on 23.4 kHz is/was not locked to a frequency standard.

Hi Andyz,

You might want to try the squelch options of kiwirecorder.py. I do not know down to which S/N FT8 Mode can go. But you can see what happens if you use -T 10 (10dB over running average) --squelch-tail 0.2.

And if the CPU power of the beaglebone is not sufficient you can do the processing and recording on another computer, e.g. a RPI, like some people do for WSPR.

Christoph

Hi Andyz,

You might want to try the squelch options of kiwirecorder.py. I do not know down to which S/N FT8 Mode can go. But you can see what happens if you use -T 10 (10dB over running average) --squelch-tail 0.2.

And if the CPU power of the beaglebone is not sufficient you can do the processing and recording on another computer, e.g. a RPI, like some people do for WSPR.

Christoph

It looks like I found a way to combine several IQ data streams from the same KiwiSDR recorded at different (by multiples of 12kHz or 20.25kHz) frequencies, so that the combined spectrum is continuous, see here. This uses GNURadio, so for everyone not familiar with GNURadio there is a learning curve.

There are obvious applications, i.e., monitoring of HF radars such as CODAR, and WBHF waveforms.

It looks like I found a way to combine several IQ data streams from the same KiwiSDR recorded at different (by multiples of 12kHz or 20.25kHz) frequencies, so that the combined spectrum is continuous, see here. This uses GNURadio, so for everyone not familiar with GNURadio there is a learning curve.

There are obvious applications, i.e., monitoring of HF radars such as CODAR, and WBHF waveforms.

It looks like I found a way to combine several IQ data streams from the same KiwiSDR recorded at different (by multiples of 12kHz or 20.25kHz) frequencies, so that the combined spectrum is continuous, see here. This uses GNURadio, so for everyone not familiar with GNURadio there is a learning curve.

There are obvious applications, i.e., monitoring of HF radars such as CODAR, and WBHF waveforms.