Experiments with RTL SDR

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Got an RTL-SDR stick and downconverter. What to use it to build RF HEATMAPS, specifically to monitor a new Solar Installation going in at a local school. Plan is to create a heatmap before the system goes online and then after to see if any new interference is detected.

System contains:

First run rtl_power to scan a band:

timeout 1h rtl_power -f139M:139.35M:100 -p59 ~/20M_band.csv


"timeout 1h" is a GNU coreutils program that will send an ineterupt to the program after 1 hour
"rtl_power" the binary program
"-f139M:139.35M:500" scan the band from 139.00MHz to 139.35MHz in 500 Hz steps (actually 14.00 to 14.350 through the upconverter)
"-p59" compensate 59 parts-per-million error in the tuner
"~/20M_band.csv" where to save the data

Then when that's done, feed it into the heatmap program:

python heatmap.py ~/20M_band.csv ~/20M_band.png


"python heatmap.py" is the python program to parse the data
"~/20M_band.csv" input data
"~/20M_band.png" output image