The Yaesu DSP2 Digital Signal Processing for FT857 Board provides superior interference rejection and transmitter talk power. DSP BANDPASS FILTER Separate DSP bandpass filters for voice and CW augment the analog filters for enhanced interference rejection. For voice modes, you get 16 high-pass filter cutoff frequency selections and 32 low-pass filter selections for a total of 512 combinations. For CW you may choose bandwidths of 240 Hz, 120 Hz or razor sharp 60 Hz. DSP AUDIO NOTCH The DSP Auto-Notch can reduce interference caused by annoying carriers within the audio passband. If multiple carriers are present, the DSP will detect an notch all the carriers present. DSP NOISE REDUCTION The noise reduction filter utilizes as many as 16 noise-reduction algorithms for use in a wide of variety of noise environment, without introducing appreciable distortion of the desired signal. Operator fatigue is reduced and signal-to-noise ratio is significantly enhanced. DSP MICROPHONE EQUALIZER A four position mic equalizer circuit results in increased talk power as extraneous frequencies are suppressed, allowing all available power to be concentrated on your voice pattern.