microHAM MK2R Manual page 38

MK2R allows customizing the audio configuration to meet the needs of a specific logging program and operating
style (VOX, foot switch, computer generated transmit/receive switching, etc.) for each mode. In addition, two
sound cards (external for MK2R or internal for MK2R+) - one for CW and voice (USB Voice CODEC or SC1)
and one for digital modes (USB Audio CODEC or SC2) are selected automatically based on radio mode and
user preferences.
If the same mode (CW, voice, FSK, digital) is selected on both radios, the same sound card is used for both
radios, One channel is used for each radio – typically left channel to RADIO1 and right channel to RADIO2.
Output for the "unselected" radio is muted automatically when using Router DVK.
The output of the sound card or codec not being used for transmitting can be utilized for audio "feedback" -
software events/warnings, external spot announcements, or audio review. The output of this sound card can be
switched to the headphones under user control by selecting SC left or SC right to the left, right or both ears.
When RADIO 1 and RADIO 2 are in different modes (digital <-> voice/cw), each radio uses a separate sound
card or codec and the sound card output will not be connected to the headphones.
There are three distinct audio paths in MK2R and MK2R+. Each path is handled independently:
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From transceiver fixed level audio outputs through MK2R to the sound card.
MK2R allows flexible audio selection of from both radios (and both receivers in
dual receiver transceivers). Audio from the transceivers' "fixed level" outputs are
connected to the SC2 line in (MK2R) or USB Audio CODEC (MK2R+). The signal
for each sound card channel is selected using the LEFT (B16) and RIGHT (B17)
buttons on the front panel. The level for each channel is adjusted individually by
the pots (16) and (17).
The + (B5) button can be used in conjunction with the LEFT (B16) and RIGHT
(B17) button to allow selecting more than one source to each sound card channel.
The selected sources are shown by the front panel lights (4) and (5).
Pressing the LEFT and RIGHT buttons at the same time connects the input of SC2
or the USB Audio Codec to the MK2R headphone output. This is called "What
Your Hear" (WYH) and permits recording exactly the same audio as heard in the
headphones. The WYH light will illuminate when WYH mode is selected.
NOTE: Audio to SC2 (MK2R) or USB Audio CODEC (MK2R+) DOES NOT
CHANGE with the transmit/receive state of the radios or the selected transmitter.
From transceiver headphone outputs to the operator headphones.
MK2R allows flexible audio selection of from both radios (and both receivers
in dual receiver transceivers). Audio from the transceiver headphone jacks is
connected to the MK2R headphone input, (optionally) mixed with other audio
sources and routed to the headphone jack.
Pressing and holding the + (B5) button in conjunction with LEFT EAR (B4) or
RIGHT EAR (B6) buttons allows selecting/mixing multiple sources for each
ear. The audio selection for each ear is indicated by lights (2) and (3) at front
panel.
The RADIO1 (B7), BOTH (B8) and RADIO2 (B9) buttons allow fast, manual
selection of Radio1, Both (Split/Mix), or Radio 2.
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from the transceiver fixed level audio outputs to the sound card input
from the transceiver headphone output to the operator headphones
from the sound card to the transceiver inputs including microphone switching
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