microHAM MK2R Manual page 39

When the RADIO1 and RADIO2 buttons are pressed simultaneously, the AUTO light will illuminate and MK2R
will switch to the AUTO switching mode. The AUTO mode recognizes five (5) states:
RADIO1=RX & RADIO2=RX & RX focus=R1
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RADIO1=RX & RADIO2=RX & RX focus=R2
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RADIO1=TX & RADIO2=RX
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RADIO1=RX & RADIO2=TX
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RADIO1=TX & RADIO2=TX
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Receive audio (headphone) switching can be programmed separately for each of these states. MK2R stores up
to eight sets of audio configuration Functions or "scenarios". Functions F1 through F4 are saved/recalled by
pressing F1 (B10) through F4 (B13). Functions F5 through F8 are accessed by holding + (B5) and pressing F1
through F4.
To enter into programming mode, MK2R must be placed into AUTO mode by pressing the RADIO1 (B7) and
RADIO2 (B9) buttons at the same time and then selecting + (B5) and BOTH (B8) simultaneously. The AUTO
light will flash while the MK2R is in programming mode. To exit Programming mode, press B5 and B8
simultaneously.
From the sound cards to the transceivers including microphone switching.
Audio from the sound cards or codecs can be used for two purposes - it can be used as a digital Voice Keyer
(DVK) in voice modes (SSB, AM, FM) or for generating digital modes (AFSK/RTTY, PSK31, MFSK, etc.). If both
outputs of either sound card/codec are unused, that sound card can be routed to the headphones by using the
LEFT EAR and RIGHT EAR buttons described above.
MK2R recognizes four operating modes for each radio: CW, VOICE, DIGITAL and FSK. Each operating mode
has a separate configuration for routing audio among the microphone, sound card or codec input, sound card or
codec output and the transceiver inputs. The microphone can be switched to either the sound card mic input or
the microphone input of either transceiver. Output from the sound card can be switched to the transceiver
microphone jack (VOICE modes) or to the transceiver rear panel audio input (FSK and DIGITAL modes).
There are three audio configurations (settings):
setting A: disconnects the computer generated audio and connects the microphone directly to the
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transceiver microphone input.
● setting B: routes the audio generated by computer to the transceiver rear panel audio input (PKT, AUX,
or ACC depending on manufacturer). This audio routing is used for digital mode operation and sound
card SC2 (MK2R) or USB Audio CODEC (MK2R+) output. Since the PKT or AUX input of most radios
bypasses the radio internal microphone preamp and other audio processing stages which can distort
digital modulation from the sound card, setting B is recommended for digital mode operation. In setting
B, the microphone should be muted to avoid "hot mic" issues.
setting C: routes the computer generated audio to the transceiver microphone input. This audio routing
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is used for VOICE modes and DVK operation from contest software. In setting C the microphone is
normally connected to the microphone input of sound card SC1 (MK2R) microphone input or USB Voice
CODEC (MK2R+).
For settings B and C, the microphone can be muted in the sound card if necessary. If the microphone is NOT
muted, it is indicated by a lower case "m" in the setting string.
Router manages the Audio Switching based on three ways of generating PTT (VOX or software command,
COM/LPT/WinKey PTT, and foot switch or hand mic PTT). Each PTT type can have a different audio
configuration.
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