Toa SX-2000 Series Installation - Manual (Page 69)

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Step 3. using the microphone volume control, adjust the microphone input sensitivity to an appropriate level
(until the broadcast status indicator lights green).
RM-200SA rear
FIREMAN'S MICROPHONE
RM-200SF
MIC SP CPU
OFF ON Microphone volume control
Microphone volume control
RM-200SF top
Step 4. Set DIP switch 5 of the rm-200Sf to off or DIP switch 4 of the rm-200SA to off.
Note
Be sure to set both DIP switches to off after adjusting the microphone input sensitivity.