DSP controller CW keying waveform shaping. Multi-function electronic keyer with adjustable keying speed, dot-dash ratio and paddle polarity. AGC volume knob for fine tuning of the AGC time constant. 3-step manual notch filter. Microphone equalizer and adjustable transmit bandwidth. Built-in RTTY and PSK31 modulator and demodulator. PRe-amplifier and mixer circuit dedicated for 50MHz band. High quality digital voice memory. 64MB CF memory card for storing various personal settings. Digital twin PBT eliminates interference from adjacent signals. 16-step noise reduction. 4 antenna connectors with automatic antenna selector. Triple band stacking register. Automatic antenna tuner. Twin peak audio filter for RTTY operation. Message memory for CW, RTTY and PSK31 operations. 101 memory channels.