Extron Electronics Ultra Series Manual

A SERVICE OF

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CrossPoint / MAV Matrix Switchers • Operation

Optimizing the Audio (Audio Models)

Eachindividualinputaudiolevelcanbeadjustedwithinarangeof-18dBto

+24dB,sotherearenonoticeablevolumedifferencesbetweensourcesandforthe

best headroom and signal-to-noise ratio. Adjust the audio gain and attenuation 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(audio

models)”,inchapter2,“Installation”.Forbestresults,wirealloftheinputs

and the outputs balanced.

2. Powerontheaudiosources,theswitcher,andtheaudioplayers.

3. Switchamongtheinputs(see“Creatingaconguration”,inthischapter),

listening to the audio with a critical ear or measuring the output audio level

withtestequipment,suchasaVUmeter.

4. As necessary, adjust the input audio level of each input (see “Viewing and

adjustingtheinputaudiolevel(audiomodels)”,inthischapter)sothatthe

approximate output level is the same for all selected inputs.

5. As necessary, adjust the output audio level of each input (see “Viewing and

adjustingtheoutputvolume(audiomodels)”,inthischapter).

Troubleshooting

This section gives recommendations on what to do if you have problems operating

the switcher and it describes an actual image problem that Extron has encountered.

General checks

1. Ensure that all devices are plugged in and powered on. The switcher is

receivingpowerifoneofthefrontpanelPowerSupplyLEDsislitgreen.

2. Check to see if one or more outputs are muted.

3. Ensure an active input is selected for output on the switcher.

4. Ensure that the proper signal format is supplied.

5. Check the cabling and make corrections as necessary.

6. CalltheExtronS

3

Sales&TechnicalSupportHotlineifnecessary.

Plasma display S-video problem (CrossPoint switchers)

ExtronhasencounteredaproblemwhenaCrossPoint450PlusorCrossPointUltra

switcherroutesS-videothatisoutputbysomevideoconferencecodecs.Some

codecschangetheDCoffsetonthechrominance(C)sothatitisverydifferentfrom

the level on the luminance (Y). This can cause a plasma display to come up in the

wrong size mode.

Withthematrixswitchertakenoutofthesystem,theplasmaworksne.Itlooks

like a problem with the matrix switcher, but it is not. The matrix switcher boosts

the bad codec output, which makes the plasma go to the wrong setting.

Solution:TryplacinganExtronvideoDCblockadapter,part#26-495-02, on the

luminance (Y) input to the switcher from the codec.