Raspberry Pi 3 Model B Rev 1.2, runs but get alsa under-runs

jj1bdx / airspy-fmradion

Software decoder for FM/AM broadcast radio with AirSpy R2 / Mini, Airspy HF+, and RTL-SDR

GNU General Public License v3.0

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Raspberry Pi 3 Model B Rev 1.2, runs but get alsa under-runs #23

Closed wa2zkd closed 4 years ago

wa2zkd commented 4 years ago

SDR = AirspyHF+

wa2zkd commented 4 years ago

May be related to an under-voltage issue on Pi. The Airspy draws a slug of current, dmesg shows an UV warning and the Pi's red LED goes out. I have tried various PSU and cables, same deal. I'll have to get a powered USB hub going next.

wa2zkd commented 4 years ago

To test my theory, I connected a variable lab supply to the Pi and with the AS on a USB port, I adjusted the voltage on the USB port to 5.0V. No more under-runs! Note: ASHF+ draws about 325 mA

jj1bdx commented 4 years ago

@wa2zkd I was using a 5V 2A dedicated power supply when I successfully ran airspy-fmradion on a Raspberry Pi 3B. The power supply voltage indeed affects the processing performance.