max_freq crfa_max_freq [crfa] import crfa crfa.max_freq($fft_len, $num_decoders, $center_freq, $samp_rate,$round_to) set_center_freq($center_freq); fft lenngth fft_len int round to (in hz) round_to int number of decoders num_decoders int center frequency center_freq float sample rate samp_rate int in float $fft_len out message 1