Lexicon SDP-40 manual Levels Calibration, Internal Noise Test

!CAUTION!

HIGH AUDIO LEVELS

INTERNAL NOISE

The SETUP Menu

JBL

MAIN MENU

MODE ADJUST AUDIO CONTROLS SETUP

Note:

SETUP

INPUTS

SPEAKERS

REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS

LOCK OPTIONS

SPEAKER SETUP

CUSTOM SETUP SYNTHESIS 7CH SETUP SPEAKER DISTANCES LEVELS CALIBRATION

		R	SR	RR
		0.0dB	0.0dB	0.0dB
		C
		0.0dB
	M	L	SL	RL
	SUB
0.0dB		0.0dB	0.0dB	0.0dB

LEVELS CALIBRATION

INTERNAL NOISE TEST DACS CALIBRATION SUB LIMITERS

SPEAKER LEVEL ADJUST

FRONT LEFT	+0.0dB
CENTER	+0.0dB
FRONT RIGHT	+0.0dB
SIDE RIGHT	+0.0dB
REAR RIGHT	+0.0dB
REAR LEFT	+0.0dB
SIDE LEFT	+0.0dB
SUB (MONO) *	+0.0dB
SUB RIGHT	+0.0dB
LFE SUB	+0.0dB

Front panel and remote control buttons - except the MENU button and MENU arrows - will not function while the SPEAKER LEVEL ADJUST menu is selected. All buttons will regain functionality when the menu is exited.

*When SUB L/R is set to STERE0 or NONE (see page 3-22), the SUB MONO parameter will appear as

SUB LEFT.

LEVELS CALIBRATION

SETUP SPEAKERS LEVELS CALIBRATION

Properly calibrated output levels are critical. Setting output levels is a simple procedure using a Sound Pressure Level (SPL) meter. This device measures the relative loudness of the speakers so that output levels can be calibrated accurately. An SPL meter can be purchased at Radio Shack (catalog no. 33-2050).

To ensure the most accurate calibration levels:

•Eliminate extraneous noises in the listening space, such as conversation, air conditioners, and sounds that filter in from open doors and windows.

•Remove objects (including people) that obstruct the line-of-sight path between the SPL meter and the speaker being measured.

•Measure output levels from the primary listening position, placing the SPL meter at the approximate spot where the listener’s head will be during listening.

INTERNAL NOISE TEST

Selecting either INTERNAL NOISE TEST or DACS CALIBRATION accesses the SPEAKER LEVEL ADJUST menu

(pictured above). When INTERNAL NOISE TEST is selected, a cautionary message (pictured at the right) will appear on the

screen. This serves as a reminder that the INTERNAL NOISE TEST generates loud calibration noises. When the message appears, press the right MENU arrow to proceed to the SPEAKER LEVEL ADJUST menu. Press the left MENU arrow to return to the LEVELS CALIBRATION menu.

As the INTERNAL NOISE TEST is conducted, a noise signal will move from output to output following the order on the SPEAKER

3-26