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Meridian Audio G68 Calibrating the system, Introduction, Using a Sound Pressure Level meter

Models: G68 G68

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Calibrating the system

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C a l i b r a t i n g t h e s y s t e m

Calibrating the system

To help you to set up the installation to give the best possible sound with any particular

combination of associated equipment, the G68 Digital Surround Controller includes a built-in

calibration procedure.

This calibration procedure uses test signals to present a series of sounds, which you use to

adjust certain aspects of the system to their optimum settings.

You should use the calibration procedure the first time you set up the system, and whenever

you want to check the calibration, such as after changing the layout of the room.

Introduction

We recommend that you perform the calibration procedure using the MSR+ and from the listening position.

As you run the calibration procedure the name of each calibration test is shown on the front-panel display, followed by the parameters adjusted in the test.

Each calibration test uses a test signal designed to give the best results.

Using a Sound Pressure Level meter

Although you can perform the calibration procedure by ear, it is recommended that you perform the tests using a Sound Pressure Level meter. These are available fairly cheaply from Tandy/Radio Shack, or your Meridian dealer may be able to lend you one.

Set the Sound Pressure Level meter to C weighted, and Slow. Take readings with the meter at the listening position, pointing vertically. You should hold the meter with an outstretched arm to minimise reflections from your body.

You can choose to display and enter distances in either feet and inches or metres.

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Meridian America G68 manual Calibrating the system, Introduction, Using a Sound Pressure Level meter

Contents

G68 Digital Surround Controller Installation GuideRadio interference Safety warningsTo avoid overheating To avoid interferenceContents i P r e f a c e Copyright and acknowledgementsSales and service in the UK Sales and service in the USADigital surround controller models Introduction2 I n t r o d u c t i o n G68 Digital Surround ControllerVideo switching Smart Source featureIntegral tuner 3 I n t r o d u c t i o nMeridian Room Correction Multi-zonecapabilitiesWeight SpecificationsPower DimensionsUnpacking Installing the digital surround controllerd i g i t a l s u r r o u n d c o n t r o l l e r Audio inputsUse this connector 6 I n s t a l l i n g t h eG68 Digital Surround Controller 7 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r TV tunerd i g i t a l s u r r o u n d c o n t r o l l e r 8 I n s t a l l i n g t h e9 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rSACD/DVD-Aplayer d i g i t a l s u r r o u n d c o n t r o l l e r Audio outputsDigital version G68D 1 I n s t a l l i n g t h eUse this output Digital and analogue version G68ADV1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rUse this output Analogue version G68AXV1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rUse this output Balanced analogue version G68XXV1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e r1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rDSP5000C G68ADV/AXV/XXV 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r G68ADV/AXV Digital Surround ControllerSUB DIRECT CROSSOVER INPUTINPUT PHONO LEAD 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Subwoofer G68 Digital Surround ControllerMain composite outputs Video connections1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rUse this output 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Video outputsTelevision/monitor G68ADV/AXV/XXV1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rd i g i t a l s u r r o u n d c o n t r o l l e r 2 I n s t a l l i n g t h eVideo recorder 2 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r G68ADV/AXV/XXVd i g i t a l s u r r o u n d c o n t r o l l e r Tuner and communications connectionsUse this connection 2 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r AutoNot Con 2 I n s t a l l i n g t h eTo connect FM and AM antennae 2 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r G68 Digital Surround ControllerTo go back to an earlier configuration option Configuring the digital surround controllerConfiguration Wizard To run the Configuration WizardTo reset the configuration Stage 1 Resetting the product1 Reset settings Reset all settings?Music Sub TypesType SpeakersEither Stage 2 Configuring speakersTo configure the speakers 2 Select speakersDescription Speaker optionsOption ValuesRadio Stage 3 Configuring sources3 Configure sources To configure a sourceDescription Source optionsOption ValuesTo change a setting Stage 4 Configuring other settings4 Other settings To configure other settingsDescription SettingsOption ValuesPage Using a Sound Pressure Level meter Calibrating the systemIntroduction Left Level +0.0dB To start the calibration procedureTo exit from the calibration procedure To complete the calibration procedureLeft Level +0.0dB Calibration testsLevels DistanceLeft Distance Fine tuningPhase SettingSpeaker size Left Size 5/28C a l i b r a t i n g t h e s y s t e m To adjust the subwoofer crossover frequency Using the Sine/Sub/Sens controlsSubwoofer crossover frequency Sinewave sweep test80.0Hz 88.5Hz81.5Hz PauseTV 2.0V Clip Setting up sourcesTo adjust the sensitivity of a source TV 1.4V PeakSpeaker layouts DSP presetsDSP presets 4 D S P p r e s e t sParameter Standard parametersDefault 4 D S P p r e s e t sMusic DSP presets for two-channelmaterialMusic and Trifield DSP preset parameters 4 D S P p r e s e t sSuper Ambisonics and Super DSP preset parameters4 D S P p r e s e t s AmbisonicsMusicLogic MusicLogic DSP preset parametersPLIIx Music DSP preset parameters 4 D S P p r e s e t sPLIIx Movie and PLIIx THX PLIIx Movie and PLIIx THX DSP preset parameters4 D S P p r e s e t s Stereo and DirectTV Logic TV Logic DSP preset parametersMono DSP preset parameters 4 D S P p r e s e t sCinema DSP presets for multichannel materialDiscrete and Cinema DSP preset parameters 5 D S P p r e s e t sOptions THX DSP preset parameters5 D S P p r e s e t s ParameterUsing dynamic range control 5 D S P p r e s e t sAmbisonics Defining your own presets To save the preset settings5 D S P p r e s e t s To clear a user-definedpreset Stored5 D S P p r e s e t s Standby light not lit TroubleshootingGeneral operating problems 5 Tr o u b l e s h o o t i n gUnit is overheating Audio problems5 Tr o u b l e s h o o t i n g Remote not workingSound not clear Audible hiss at high volume settingsConfiguration Program Guide 5 Tr o u b l e s h o o t i n gsource Video problemsRadio tuner problems 5 Tr o u b l e s h o o t i n gTo clean the audio and video connections MaintenanceCleaning To clean the case, display panel, and keypad6 Tr o u b l e s h o o t i n g Service and guaranteeService GuaranteeI n d e Index6 I n d e 6 I n d e 6 I n d e Width DSP parameter video switching6 I n d e video connections 17 inputs 18 outputs6 I n d e