Datasat AP20 - Page 39

AP20 Installation and Operating Guide Page 39
AP20 Installation & Operating Guide Document # 9301H39200 Ver. 1.25
2.10.1 Set levels to establish a baseline
 In the auditorium, confirm that all amplifiers are ON, mute is OFF, and masking and
curtains are opened.
 Use a high-quality, calibrated SPL meter in the auditorium.
Menu (System) > Formats > Audio Levels
 Set the Fader to 7.0. This is the standard reference level.
 Run Pink Noise on each channel, one by one.
 First, by adjusting the amplifiers, try to achieve the baseline levels. Set the SPL levels
according to the chart below.
Note that SPL readings should be measured un-weighted, or C-weighted, with the meter set
to slow.
Use an RTA to calibrate the proper level setting of the subwoofer.
Table 9: SPL levels
Channel Description SPL
1 Left 85 dB
2 Right 85 dB
3 Center 85 dB
4 Sub bass 91 dB*
5 Left Surround 82 dB
6 Right Surround 82 dB
7 Back Surround 82 dB
8 Left Center 85 dB
9 Right Center 85 dB
* Subwoofer should be set to 10 dB of in-band gain
(see SMPTE RP-200), which equates to approximately 91 dBC (slow).
 If not possible to achieve the baseline, use the AP20 (Analog Output Levels) to make minor
adjustments.