Specifications

XD10 Cinema Media Player, Installation and Operating Guide Version 1.0
3.2.1. Verifying Audio Levels
The pink noise tests that are built into the XD10 are used only to make A-B comparisons to an alternate
sound source such as magnetic sound track or analog sound.
Be aware that some external pink noise generator cards used on some cinema processors
(such as CP65 and CP55, that do not have internal pink noise generators) may have a level
discrepancy of as much as 1.5dB. For this reason the 1kHz test tone is used for setting the
XD10 audio output levels.
The XD10 must be ON. Refer to chapter 1, topic Level Adjustment, for details.
1. Select Pink Noise from the Level Adjustment menu (Main menu | System Setup | Audio Setup | Level
Adjustment). Press ENTER.
An adjustment screen for the first channel will display. The XD10 will begin playing Pink Noise and
the blue DTS Playback LED will light. The XD10 should automatically pulse the CP to the format
used by DTS. The Pink Noise will begin playing on Ch-1 (Left) and will switch to the selected
channel as you cycle through the channels.
Adjust level for
Ch 1 (Left)
[ +00.0 dB ]
Pink Noise on Ch 1
Press ► or ENTER to advance to
the next channel. Press ▲ or ▼ to
change level setting.
2. Open the screen curtains, set the CP level to reference (fader setting ‘7’ for most cases), go into the
theater, and take SPL readings in the rear third and just off-center of the room. All amplifiers should
be powered on and all speakers should be un-muted.
Caution: Do NOT simply point the SPL meter out of the porthole window. This will not give
you accurate SPL readings.
3. You may double-check the SPL settings using the table below. If you find a level discrepancy, first
go back and verify the CP “B-chain” setup. Remember, the XD10 follows the CP and any level or
EQ adjustment. Information on setting all appropriate levels is provided on the XD10 display. The
XD10 levels may be readjusted to achieve the levels indicated in the table below.
Caution: Pink Noise tests assume the CP levels are correct. If the CP levels are NOT correct,
then adjusting the XD10 levels using the Pink Noise will mask a misalignment of the CP.
Then if you later realign the CP properly, the XD10 levels will be wrong. To avoid this
potential problem, be sure to align the CP’s B-chain first (set levels and adjust EQ).
Table 3-1. Pink Noise Level Adjustments
SPL
1 Left channel 85dBC
2 Right channel 85dBC
3 Left surround 82dBC
4 Right surround 82dBC
5 Center channel 85dBC
6 Sub Bass channel, low passed
w\DTS filter
91dBC
7 Left Center channel 85dBC
8 Right Center channel 85dBC
9 Back Surround (Coherent
Acoustics configuration only)
82dBC
10 Aux (Coherent Acoustics
configuration only)
82dBC
Note: SPL readings should be measured unweighted, or C weighted – slow response.
Calibration and Setup Document #: 9301E692001.0
3-2