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Rear Panel
(1) – EXT SP
External speaker or second headphones.
Connector: 3.5mm (1/8”) stereo
TIP – Left channel RING – Right channel SHELL – Ground
(2) – MIC
Station microphone (original) for Radio #1.
Connector: RJ45 female
If the original radio microphone uses a connector other than an RJ45 the appropriate adapter is provided with
the cable set. All microphone controls are connected to the RADIO1 DB37 connector (pins 12-15 and 30-33).
Important warning: If dissimilar radios are attached to the MK2R or MK2R+
NEVER connect the microphone from Radio #2 to this jack.
(3) – RADIO1
Multi-pin jack for RADIO1 interconnection.
Connector: DB37 female
Detailed description is in Appendix A.
(4) – RADIO1 SUB RX
Input for constant level audio from the second (SUB) receiver RADIO1.
Connector: 3.5mm (1/8”) stereo
TIP – Signal RING – Signal (internally connected to TIP) SHELL – Ground
(5) – RADIO2 SUB RX
Input for constant level audio from the second (SUB) receiver RADIO2.
Connector: 3.5mm (1/8”) stereo
TIP – Signal RING – Signal (internally connected to TIP) SHELL – Ground
(6) – R1 + R2 HP AUDIO
Input for headphone audio outputs from both RADIO1 and RADIO2.
Connector: DIN6
Pin 1 – RADIO1 Left channel (TIP)
Pin 2 – RADIO1 Right channel (RING)
Pin 3 – RADIO1 Ground (SHELL)
Pin 4 – RADIO2 Left channel (TIP)
Pin 5 – RADIO2 Right channel (RING)
Pin 6 – RADIO2 Ground (SHELL)
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