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Notes
TostoptheARCmeasurementpartway,presstheARCswitch.
• NeveroperatetheswitchesandknobsoftheM-864DandtheexternalequipmentduringtheARC
measurement.
[ARC measurement operation]
A 3-stage operation shown below is performed during the ARC measurement.
Different tones sound in each operation stage.
TheARCoperationindicatorashesslowlyduringnormalmeasurement,butitbeginstoashrapidly
when a failure occurs.
Flashing slowly
ARC operation indicator status
Flashing rapidly
Measurement progresses normally A failure occurs
* Perform the following reset operation if these errors occurred.
1. Stop the measurement by pressing the ARC switch.
TheARCindicatorstopsashingrapidly,thengoesofforlights
steady. (See p. 35.)
2. Remedy the cause of the failure, then restart the ARC
measurement in Step 7.
Measurement starts.
Volume adjustment: Specific tone (hiss) sounds twice.
Distance measurement: Specific tone (snap) sounds twice.
Measurement is complete.
Sound field measurement: Specific tone (swish) sounds 3 times.
When the ARC operation indicator flashes rapidly*
When the ARC operation indicator flashes rapidly*
The signals input to the MONO INPUTs 2 through 8, and STEREO INPUTs 1 and 2 are
muted during measurement. (Only the MONO INPUT1's signal is output.)
The FBS function and Automatic mute function are temporarily disabled.
The MONO INPUT 1 is not assigned to any output.
Check the assignment setting.
When the ARC operation indicator flashes rapidly
soon after measurement starts*
Input level is too low.
•Speakintothemicrophone,andcheckthatvoiceisoutputfromthe
speaker.
•IncreasetheinputlevelbymovinguptheMONOINPUT1'sinput
fader.
Large noise is detected.
Adjust the microphone direction. Also, check the presence of large
ambient noise.
(See Step 4 on p. 30.)
32


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