JVC GY-HM100U Manual page 33

Shure audio mixer, back.
VU RANGE – should be set to +8.
SIMPLEX – provides "phantom" power for microphones that require it. Should be
set to OFF when using microphones which are self-powered.
GROUND, 2 & 3 (red knobs) – not used.
LINE / MIC (output) – this switches the audio from the OUTPUT between a line
signal and a mic signal. If the output is going into a camcorder's mic input, set
this to MIC. If it is going into a vcr's (or other recorder) audio input, set to LINE.
OUTPUT – this is where you connect the output of the mixer to the camera or other
recording device.
LINE / MIC (inputs) – this switches the audio going into the INPUTs between a line
signal and a mic signal. If the input is coming from a microphone, set this to
MIC. If it is coming from another audio device, set to LINE.
INPUT(S) - this is where you connect the inputs (mics, etc.) to the mixer.
MIX BUS – not used.
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