Question: how to use the baseline feature

[sq5bpf]

I can't find any information how to use the baseline feature.

What i'd like to do:

• connect a noise source to the receiver
• save the spectrum as baseline
• use the "substract baseline" feature to get a nice flat line, preferably at 0dB
• connect a filter between the noise source and the receiver, and see the filter characteristics (and be able to see the filter passband attenuation directly on the screen)

Unfortunately i can't find any information how to save the baseline file in qspectrumanalyzer , or what is it's format. I'm using version 2.2 (git master) Could you help?

[Patnetpatnet]

I agree. I'm finding it hard following the bit on the first page here that says "Controls should be intuitive." :) I do not understand what any of the settings are, yet would like to use it. Thanks to anyone who could fill in some of these blanks.

[sq5bpf]

A note to people having the same problem:

• use the sopy_power backend

• execute qspectrumanalyser in a terminal, set the required parameters, run scan

• during execution you will see something like this in the terminal: Starting backend: soapy_power -f 600.0M:1500.0M -B 100.0k -T 0.5 -d driver=rtlsdr -r 2560000.0 -p 64 -F soapy_power_bin --output-fd 29 -g 38.0 -k 37.0 -c --even --fft-window boxcar --remove-dc

• stop execution

• execute this command, but remove -c and --output-fd XX, redirect to a file: soapy_power -f 600.0M:1500.0M -B 100.0k -T 0.5 -d driver=rtlsdr -r 2560000.0 -p 64 -F soapy_power_bin -g 38.0 -k 37.0 --even --fft-window boxcar --remove-dc

• stop execution > ~/baseline_rtl

• use the baseline_rtl file for the baseline in qspectrumanalyser

[FPSychotic]

A note to people having the same problem:

• use the sopy_power backend
• execute qspectrumanalyser in a terminal, set the required parameters, run scan
• during execution you will see something like this in the terminal: Starting backend: soapy_power -f 600.0M:1500.0M -B 100.0k -T 0.5 -d driver=rtlsdr -r 2560000.0 -p 64 -F soapy_power_bin --output-fd 29 -g 38.0 -k 37.0 -c --even --fft-window boxcar --remove-dc
• stop execution
• execute this command, but remove -c and --output-fd XX, redirect to a file: soapy_power -f 600.0M:1500.0M -B 100.0k -T 0.5 -d driver=rtlsdr -r 2560000.0 -p 64 -F soapy_power_bin -g 38.0 -k 37.0 --even --fft-window boxcar --remove-dc
• stop execution > ~/baseline_rtl
• use the baseline_rtl file for the baseline in qspectrumanalyser

Hi, I want to get the same, but the issue I dont know what you mean with run the program in console and run, when run the program in terminal the gui apear and I cannot write anymore in the terminal, not run command, or stop or save to file. I cannot find anywhere what is run in console. Please could you be more specific for a beginner as me? If you have a hackrf would be great id you can share your setup, I dont know what means here bin, bandwidth,rate...no idea, hackrf can sweep to 8Ghz, but only in sweep, bandwidth is 20mhz in specs, which I should use, really this software is impossible to understand for me as beginner. Would be great if you can help me a little

[wernight]

Is there a way to get it to work also for hackrf_sweep? I tried the same method but it doesn't seem to have an effect.

I noticed that right clicking the main content allows to export as CSV but that also doesn't seem to work for the baseline. Also the baseline should be some sort of average over time.