Useless spectra and wola.grc does not open #5
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What happens if you try plotting the data with Virgo? Also, I'd increase the gain to 30 dB for RF, IF and BB to help with sensitivity: import virgo
# Define observation parameters
obs = {
'dev_args': '',
'rf_gain': 30,
'if_gain': 30,
'bb_gain': 30,
'frequency': 90e6,
'bandwidth': 2.4e6,
'channels': 2048,
't_sample': 0.1,
'duration': 10
}
# Begin data acquisition
virgo.observe(obs_parameters=obs, obs_file='observation.dat')
# Plot data
virgo.plot(obs_parameters=obs, obs_file='observation.dat', plot_file='plot.png')By the way Virgo has an integrated function built into the package to survey wideband spectra: # Monitors RFI. f_lo and f_hi define the frequency limits in Hz and data is the directory in which the .dat RFI survey files are stored in.
monitor_rfi(f_lo, f_hi, obs_parameters, data='rfi_data')
# Plots RFI data. rfi_parameters should be the same as obs_parameters, but should also include 'f_lo': f_lo. Set dB=True for a wider dynamic range.
plot_rfi(rfi_parameters, data='rfi_data', dB=True, plot_file='plot.png')But see if you can detect FM stations with the original script first to verify your system is working properly. Also, what error are you getting when you try opening |
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Tanks for the quick reply. Slowly adapted your code and tested it. Everything is fine an I could not reproduce the problem with the spectra. These is a log from a failed attempt to open wola.grc:
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This is odd. How did you install Virgo? Did you simply |
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Yes. Does this file need additional files to be in the same directory or is it self suficient? |
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No, it appears you've installed the package correctly. You should be able to work with the module fine since the What I find odd is the I suspect there might be some kind of mismatch between the Git file and the installed version on your system. Could you please share the |
Hi 0xCoto,
probably not real issues but wrong handling by myself:
I am building a radio telescope. Until my RTL-SDR.com V3 arrives and my telescope is ready, I play around with an old DVB-T stick.
Hardware: Simple telescopic dipole antenna, RTL2832U + FC0013, Raspberry Pi 4
Software: Latest Raspbian and GNU Radio Compnion 3.7.13.4; Atro-Virgo installed using pip.
The hardware setup works as I can see nice waterfall spectra with GNU radio (RTL-SDR source plus QT waterfall sink) and RF Gain == 1.
I just wanted to aquire some basic data in the range of FM radio to have something to play with.
Here is my code:
`import virgo
counter = 8752e4
while counter < 11000e4:
`
It generates 9 files with 3 spectra each. Here the plotted results:
(https://ibb.co/87hwqKL)
I can just see artifacts. No idea why the first four and the latter fife are different.
As FM radio is so strong, I would have expected to clearly see the fm stations. Do you have an idea what I am doing wrong?
I tried to open wola.grc to analyze the problem but gnu companion just gave me some errors. What is your version of GNU Companion?
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