Extron electronic MAV 48, MAV 88 manual Optimizing the Audio Audio/Video Switchers, Troubleshooting

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Optimizing the Audio (Audio/Video Switchers)

Each individual input audio gain can be adjusted within a range of -18 dB to +10 dB to eliminate noticeable volume differences between sources and to achieve the best headroom and signal-to-noise ratio. Adjust the audio level as follows:

1.	Connect audio sources to all desired inputs and connect the audio outputs to
	output devices such as audio players. See “Audio input and output
	connections (audio/video models)”, in chapter 2, “Installation”. For best
	results, wire all of the inputs and the outputs balanced when possible.
2.	Power on the audio sources, the switcher, and the audio players.
3.	Apply audio signals to all inputs to be optimized.
4.	In Audio Setup mode (see “Adjusting input audio gain and attenuation”, on
	page 3-19) select among the inputs while observing the front panel Power
	LED. The LED blinks at a rate that corresponds to the highs and lows of the
	audio signal.
5.	As necessary, adjust the audio gain of each input so that the Power LED
	blinks frequently for all selected inputs. If the LED is lit most of the time, the
	level is probably too high; if the LED rarely flashes, the level is too low.

As an alternative:

• If necessary, temporarily set the output 1 level to the consumer (-10 dBV) level (see the Audio output level SIS commands in chapter 4, “Remote Operation”).

• Measure the output 1 audio level (in Audio Setup mode, the selected input is tied to output 1) with test equipment, such as a VU meter, or listen to the output 1 audio with a critical ear.

Troubleshooting

This section gives recommendations on what to do if you have problems operating the MAV Series switcher.

1.	Ensure that all devices are plugged in and powered on. The switcher is
	receiving power if the power LED is lit.
2.	Ensure an active input is selected for output on the switcher.
3.	Ensure that the proper signal format is supplied.
4.	Check the cabling and make corrections as necessary.
5.	Call the Extron S3 Sales & Technical Support Hotline if necessary.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Operation 3-27

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Contents MAV 44 / 48 / 84 / 88 Series Matrix SwitchersInstrucciones de seguridad Español Safety Instructions EnglishConsignes de Sécurité Français Sicherheitsanleitungen DeutschFCC Class a Notice Page MAV 44 / 48 / 84 / 88 Matrix Switchers Quick Start QS-1 Unbalanced stereo audio inputs toStereo audio devices to the output QS-2 MAV 44 / 48 / 84 / 88 Matrix Switchers Quick Start Quick Start MAV Series AV Matrix Switchers, cont’dSaving or recalling a preset Powering onTable of Contents Table of Contents, cont’d MAV 44 / 48 / 84 / 88 Matrix Switchers Table of Contents Iii Iv MAV 44 / 48 / 84 / 88 Matrix Switchers Table of Contents One About the Switchers MAV 44 / 48 / 84 / 88 Matrix Switchers IntroductionIntroductiontroduction, cont’d Video features FeaturesAny input to any or all outputs Audio featuresCommon features Introduction, cont’dMAV 44 / 48 / 84 / 88 Matrix Switchers Introduction Introduction, cont’d Two Tabletop use Installationstallation, cont’dMounting the Switcher Rack mounting the switcherMounting the switcher Furniture mounting the switcherInstallation, cont’d Cabling and Rear Panel ViewsVideo input and output connections Audio input and output connections audio/video models Captive screw connector wiring for audio inputsRemote connection Captive screw connector wiring for audio outputExternal sync connection Shows a basic external sync configurationMultiple device external sync connection example Power connectionThree Front Panel Controls and Indicators MAV 44 / 48 / 84 / 88 Matrix Switchers OperationOperationeration, cont’d Power/audio/data LED and infrared sensor Power/data/audio LEDDefinitions Input and output selection controls and indicators Operation, cont’dControl buttons and LEDs Video/+dB LED and Audio/-dB LED Audio Setup buttonOperations Powering up the switcherCreating a set of ties Press and release the Input 5 button figure Example 1 Create a set of video and audio tiesThis example assumes that you have performed example Example 2 Add a video tie to a set of video and audio ties11 Select the output Press and release the Output 4 button figure Example 3 Remove a tie from a set of tiesVideo Viewing the configuration19 Select video and audio Example 4 View ties by selecting an inputExample 5 View ties by selecting outputs Press and release the I/O button figure24 Select an output 26 Deselect video to view audio ties only Using presetsPreset 2 Preset Example 6 Save a preset29 Select Recall Preset mode, MAV Example 7 Recall a presetConsumer VCR Audio Inputs Adjusting input audio gain and attenuationTo exit Audio Setup mode. The Audio Setup LED turns off Seconds Example 8 Adjust the input audio gain+2 dB 34 Adjust the input audio levelPress and release the and buttons simultaneously figure Resetting audio gain single inputSetting the output audio level Resetting audio gain all inputsClearing all ties and presets Front panel security lockout Executive modeMemory 43 System reset to factory defaultsTroubleshooting Optimizing the Audio Audio/Video SwitchersWorksheet example 1 System equipment Worksheets45 Worksheet example 2 Daily configuration Worksheet example 2 Daily configuration46 Worksheet example 3 Test configuration Worksheet example 3 Test configurationOutput destinations Configuration worksheetOperation, cont’d Four Simple Instruction Set Control Host-to-Switcher instructionsMAV 44 / 48 / 84 / 88 Matrix Switchers Remote Operation RemoteOperation,cont’dSwitcher-initiated messages Remote Operation, cont’d Switcher error responsesUsing the command/response table Symbol definitionsCommand Ascii Command Response Additional description Command/response table for SIS commandsCommand/response table for SIS commands cont’d IR receiver enable Resets Firmware upload Turn on the echo function Loading firmware using an SIS commandSelect the firmware upgrade file Installing the software Matrix Switchers Control ProgramOverview Using the softwareExtron Matrix Switchers Control Program window blank 11 Determining the firmware version Updating the firmware12 Open window, version 2.xx firmware files 13 Open window, version 1.xx firmware files Windows buttons, drop boxes, and the trash can Windows menus File menuTools menu Preferences menu Audio-input Configuration selection18 Ties shown as crosspoints Master-Reset selectionUsing the help system Using Emulation modeAAppendix a Specifications SpecificationsandandPartPartNumbers,Numberscont’dSync composite video and S-video models Audio output audio models Specifications and Part Numbers, cont’dControl/remote switcher Included parts MAV Series AV switchersReplacement parts Part NumbersCables Optional accessoriesComposite video Cable Assorted connectors BNC connectorsPre-cut cables Video CableAsia Japan Extron’s WarrantyExtron Electronics, Europe Beeldschermweg 6C