Dolby
®
Model CP650 Installation Manual
Final Adjustments
7-15
Auditorium Assist
No Reference
→
Set Reference
Auditorium Assist
Check Auditorium
→
Set Reference
(Invalid Reference)
Auditorium Assist
Calibrate mic...
L > H
Press OK to continue
Auditorium Assist
Calibrate mic...
L * H
Press OK to continue
Auditorium Assist
Setting Reference:
Left
Press OK to cancel
7.14.2 Establish
Reference
Measurements
+
To move the display to the
Auditorium Assist
menu, press the left menu button multiple times,
or press
and hold
the button while rotating the
front-panel knob.
A “No Reference” display means there are no
reference measurements stored in CP650 memory.
An “Invalid Reference” display means the CP650
room equalization settings were changed after the
previous reference measurements were stored.
OK
Use the middle menu button to choose Set
Reference, then press the OK button to begin the
process. The CP650 will output pink noise to the
center channel speaker for initial microphone
input level calibration.
OK
If reference measurements have not been
previously stored, a meter appears allowing you to
trim the microphone input level. Adjust the input
level by turning the mic input level pot located
directly next to the bypass output level pot on the
setup control panel.
The display shows an asterisk midway between
the
L
ow and
H
igh indicators when the ideal mic
level is reached.
Press the OK button to accept the mic level setting
and do not make any further changes to the mic
level pot.
Auditorium Assist automatically begins the
reference calibration sequence, beginning with an
auditorium noise floor measurement, then cycling
through all channels. The channel being measured
is displayed.
Note:
The CP650 outputs pink noise at 85dBC for the L, C, and
R channels; 82dBC for each of the surround channels; and +10
dBr for the subwoofer.
When finished, the reference measurements are
automatically saved in the CP650 memory for
comparison against future checks, and the display
returns to the initial Auditorium Assist menu.
