Extron Electronics MTPX Plus Series Manual

A SERVICE OF

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Operation, cont’d

MTPX Plus Twisted Pair Matrix Switchers • Operation

3-40

Viewing and adjusting the local output volume

The audio level of each local output can be displayed and adjusted through a range

of100%(noattenuation)to0%(maximum[76dB]attenuation).Theaudiolevelcan

be adjusted from the front panel or under RS-232/RS-422 or Ethernet control. The

default volume is 100% (no attenuation).

N

 OutputvolumeisprotectedwhenfrontpanelLockmode2isselected.Youcan

view the volume in Lockmode2butyoucannotadjustitfromthefrontpanel.

See“SettingthefrontpanelLocks(Executivemodes)”onpage3-46.

1. Press the Esc button to clear any input buttons, output buttons, or control

buttons that may be lit.

2. To enter Audio mode, press and hold the Audio button until the button begins

to blink red, then release the button.

3. Press and release an output button to select an output. The input buttons

display the volume level for the selected output. As a general rule, the more

buttons that are lit, the higher the volume. The fewer buttons that are lit, the

lower the volume.

For a more detailed analysis of decoding the displayed value, see “Reading

the displayed volume”, below.

4. Press and release the Esc (

>

) and View (

<

) buttons to increase and decrease

the audio volume.

5. Press and release the Audio button to save the audio settings and exit the

Audio mode. The Audio button stops blinking.

N • Onlythevolumeforthelocalaudiooutputs(outputs1through4[matrix

sizes816,168,and1616]oroutputs1through8[matrixsizes1632,3216,

and3232])isadjustable.Outputsoutsidethelocalrangecannotbeselected

in step 3.

• Thereisoneaudiovolumelevelsettingperlocaloutput.Theaudiolevel

setting is shared by the left and right audio inputs.

• Theaudiovolumelevelsarestoredinnon-volatilememory.Whenpoweris

removed and restored, the audio level settings are retained.

• ExitingAudio mode by pressing the Audio button always returns the

I/ObuttonstoVideolitgreenandAudiolitred.

• PressingtheEnterorPresetbuttonalsoexitsAudio mode. Pressing the

Preset button changes to Recall Preset mode.

Reading the displayed volume

N

This section is a detailed look at reading the output volume display on the

switcher’sfrontpanel.Ifyoudonotneedtoreadtheexactvalueofthevolume

setting, skip this section.

Thereare65stepsofvolumeattenuation,with1dBperstep(buttonpush),except

for 0-to-1, which is 13 dB. At maximum attenuation, no input buttons are lit,

76dBofattenuationisapplied,andtheaudiooutputiseffectivelymuted.Atno

attenuation, all input buttons are lit and the output volume is equal to the input

signal plus any gain or attenuation that is applied to that speciﬁc input using the

input audio level adjustment. See “Viewing and adjusting the TP input audio

level”, on page 3-34. See the table on the next page to read the volume display for

each display scheme.