int frequency, symbol_rate, inversion=0, modulation=3;
sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);
int frequency, symbol_rate, inversion=0, modulation=3;
sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);