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If one radio is in CW, LSB or USB using "Voice codec SC1" and one radio is in digital mode using
"Audio Codec SC2" NO sound card will be connected to the headphones (both are in use) even if
SC is selected for the headphones.
TIP: To confirm that your logging program, digital program, or DVK is sending audio to the
radio you can temporary monitor the output of the transmit sound card in the headphones.
To do so, press and hold + button and press the RADIO1 or RADIO2 button. While you hold
this combination, you will hear the transmit audio in both headphones.
AUTO headphone switching
Automatic headphone switching is a unique and powerful feature of the MK2R. By using programmable
Function buttons, MK2R provides the maximum level of flexibility to customize headphone switching to
match actual operating conditions, including a wide variety of band conditions, contest type, operator skill
and technique. The available functions are fully configurable from very simple switching scenarios to very
complex audio switching systems.
Switching MK2R to AUTO headphone switching mode is accomplished by pressing the RADIO1 and
RADIO2 buttons at the same time. AUTO mode is indicated by the AUTO light (above the BOTH button).
provided by simultaneous press of RADIO1 and RADIO2 buttons. Pressing RADIO1, RADIO2 or BOTH at
any time will exit the AUTO mode (return to manual control).
The MK2R AUTO mode operates based on five "operating" states and one "priority" state. For each state
a different, operator defined, headphone switching configuration can be applied. In addition to the,
transmit/receive state of each radio and the transmit focus, two additional signals, "Receive Focus" and
"STEREO" (or SPLIT) are used to control headphone switching. The interface by which the logging
program communicates these additional signals can be configured on the SO2R tab in Router.
The status of the RX FOCUS and STEREO signals are indicated by the RADIO1 and RADIO2 lights.
When receive focus is on RADIO1, the light above the RADIO1 button will be illuminated. When receive
focus is on RADIO2, the light above the RADIO2 button will be on. When the STEREO (Split) signal is
present, both lights will be illuminated.
MK2R recognizes these states:
State 1:
Both radios receiving, RADIO1 has RX Focus
State 2:
Both radios receiving, RADIO2 has RX Focus
State 3:
RADIO1 is switched to transmit.
State 4:
RADIO2 is switched to transmit.
State 5:
Both radios transmitting (non SO2R mode)
Stereo:
Priority "stereo" state. Special "Stereo" settings are applied
For proper automatic operation, the configuration for each state must be defined. This can be done by
allowing the logging program to set each state but it can also be done "off line" (without the logging
program) by following a few simple steps.
1. On the SO2R tab select RX focus = Follow TX focus.
2. On the SO2R tab select an DTR on an unused COM port for Stereo Headphones
3. Switch MK2R to AUTO headphone switching mode, AUTO light is illuminated.
4. Press and hold + than BOTH button to enter programming mode, AUTO light flashing.
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Uses State 1 or State 2 depending on RX focus.
when logging program indicates "stereo" or split operation.
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