Here are the instructions
OPERATION
o To turn Control On press and release the On/Off button; the On/Off LED
will illuminate signifying that the RVC is now controlling your audio level.
Pressing the On/Off button again will turn Control Off and the audio level
will be increased to the level set by your head unit.
o To switch between audio sources press the Source button. When the
source button is in the “out” position the Main source input is selected and
the Main LED will be illuminated. When the source button is in the “In”
position the Auxiliary source input will be selected and the Aux LED will be
illuminated.
o To program the RPM level of the RVC, turn Control On by pressing the
On/Off button. Verify that the On/Off LED is illuminated. Increase the
boats RPM level to the desired set point. Press and hold the Program
button until the Program LED starts blinking. Once the Program LED
begins blinking release the Program button. When the Program LED stops
flashing, programming is complete. If the program LED turns solid for
approximately 5 seconds after flashing this indicates that there is a problem
reading your RPM signal, and the previous programmed set point will be
maintained. If you see the solid illumination from the Program LED make
sure that you have an analog RPM signal present at the gray wire of the
wiring harness. Note: The audio level will be muted during programming.
The RPM set point can be reprogrammed at any point by repeating the
procedure detailed above.
o To adjust the attenuation level, simply rotate the attenuation knob at any
time. In order for the attenuation to be audible, the RVC must be in the
Control On mode with the engine RPM level below the programmed set
point
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