In the last month or more, I noticed that my Pi3 with airspy is not producing anymore the same level of data like it used before. I have an Flight Feeder on the same antenna as a reference.
Note that the Airspy is fed from the Pi3 USB port.
The distance shown on map is still greater on the airspy, but the sample number is lower.
When investigating this, I noticed that
vcgencmd measure_clock arm result is
So CPU it is throttling to 600MHz.
If I try to force a different governor with
#performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor on all cores… the Pi3 either crashes or… it stops displaying planes (like the airspy is disconnected).
The temperature in the location of Pi3 is higher now in the summer… but the CPU temperature with
vcgencmd measure_temp is 58-61C.
Question: can this throttling be because of the power supply? I only have one 3A capable PS, ordered another one yesterday…
Any other ideas?