0xCoto
commented
3 years ago 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 wola.grc with GNU Radio Companion? It's been extensively tested with v3.7.
iHD992
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?