rtl-sdr.rules

# /etc/udev/rules.d/NN-rtl-sdr.rules
# sudo udevadm control --reload-rules && sudo udevadm trigger
# sudo usermod -a -G plugdev $USER
SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", MODE="0660", GROUP="plugdev"

up_convert_freq.py

#!/usr/bin/env python3

import sys

def convert_frequency(freq, unit):
    # Convert frequency to MHz
    if unit.lower() == "khz":
        freq_mhz = freq / 1000
    elif unit.lower() == "mhz":
        freq_mhz = freq
    elif unit.lower() == "ghz":
        freq_mhz = freq * 1000
    else:
        raise ValueError("Unsupported unit. Please use kHz, MHz, or GHz.")

    # Up-convert by 125 MHz
    freq_mhz += 125
    return freq_mhz

if __name__ == "__main__":
    if len(sys.argv) != 3:
        print(f"Usage: python3 {sys.argv[0]} <frequency> <unit>")
        sys.exit(1)
    try:
        frequency = float(sys.argv[1])
        unit = sys.argv[2]
        result = convert_frequency(frequency, unit)
        print(f"Up-converted frequency: {result} MHz")
    except ValueError as e:
        print(e)
        sys.exit(1)