Digital (FSK/AFSK/PSK31):
six transformers for DC isolation of sound card and radios
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selectable routing of radio outputs (VFO A/B) for each sound card channel
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low noise preamplifiers for improved weak signal decoding
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front panel controls to optimize levels for each sound card channel
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front panel controls to optimize mic drive for each radio
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integrated high performance, low noise floor USB sound core (MK2R+ only)
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separate USB sound codec for digital modes (MK2R+ only)
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separate digital audio drive for each radio
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selectable sound card channel output/steering for digital audio
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application specific mono/stereo signal source handling
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dual FSK output
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supports data codes with 5/6/7/8 data bits and 1/1.5/2 stop bits
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unique, hot switch protected FSK keying
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separate PTT output for digital audio mode operation with microphone muting
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nine (9) user programmable memories (FSK)
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supports PS/2 keyboard FSK transmission with type ahead and diddle function
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supports PS/2 keyboard or keypad for FSK message playback and control
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PS/2 keyboard/keypad FSK works without computer connection
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Voice (SSB/AM/FM):
front panel headset jacks
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rear panel hand/desktop microphone jack
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front panel selection of connected microphones
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supports all microphone control functions for Radio1
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selectable preamplifier supports dynamic microphones with computer interface
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selectable preamplifier for using dynamic microphones with Icom radios
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customizable microphone routing for each state (VOX / computer PTT / foot switch) by radio
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customizable microphone routing for operation style (direct to radio / through sound card)
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Digital Voice Keyer with nine messages up to 120 seconds line and unlimited "banks"
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Headphone (Receive) Audio:
front panel headphones jacks, rear panel external speaker jack
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unique "multi-source" signal handling
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supports second sound card for audio review or "spot announcements"
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able to switch any of six (6) audio sources to either ear
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1. R1 VFOA 2. R1 VFOB 3. R2 VFOA 4. R2 VFOB
5. Sound Card left channel 6. Sound Card right channel
hardware support for independent receive audio selection by operating state
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1. R1=RX, R2=RX, TX focus=R1
3. R1=TX, R2=RX
hardware support for user defined "scenarios" handling (weak pileup, strong pileup, S&P, etc ...)
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front panel control of audio mix level
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configurable audio source (VFO A/B) for each sound card channel
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support for recording headphone audio (WYH - What You Hear)
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user selectable "delayed" headphone switching (100ms steps)
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independent front panel record level level control for each channel
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additional buttons for "classic" audio control R1/SPLIT/R2 or R1/MIX/R2
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easy switching between manual and automatic control
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2. R1=RX, R2=RX, TX focus=R2
4. R1=RX, R2=TX
5. R1=TX, R2=TX
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