Toa M-864D - Manual (Page 32)

32
Notes
• To stop the ARC measurement partway, press the ARC switch.
• Never operate the switches and knobs of the M-864D and the external equipment during the ARC
measurement.
[ARC measurement operation]
A 3-stage operation shown below is performed during the ARC measurement.
Different tones sound in each operation stage.
The ARC operation indicator flashes slowly during normal measurement, but it begins to flash rapidly
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.
The ARC indicator stops flashing rapidly, then goes off or lights
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.)