Extron electronic MAV 48 ユーザーズマニュアル

•

 Pressing the I/O button cycles through video and

audio, video only, or audio only for input and output selection.  See the
Video and Audio LEDs (

) for the sequence.

•

 The I/O button also serves as the Audio Setup

selection button.  To enable the Audio Setup mode, press and hold the
Audio Setup button for about 2 seconds until the Audio Setup LED (

)

lights .  In Audio Setup mode, you can view and/or change the current
audio level setting for each input.  See “Adjusting input audio gain and
attenuation” on page 3-19.

Audio Setup mode times out after approximately 30 seconds of inactivity.

 This button is also used to perform a system reset.

See “Resetting the system to factory defaults (audio/video switchers)” on
page 3-26.

•

 The Video and Audio LEDs indicate whether video and

audio, video only, or audio only will be selected using the input buttons
(

) and output buttons (

).

Pressing the I/O button advances through a cycle of video and/or audio
selections as shown on figure 3-3.

Default

= ON

= OFF

Video Only

Audio Only

Video & Audio

•

Audio Setup mode —

 The –dB and +dB LEDs indicate the polarity of the

audio level setting.  See “Adjusting input audio gain and attenuation” on
page 3-19.  Both LEDs light to indicate unity gain (0 dB).

 The Audio Setup LED lights red to indicate that the

 The Audio Setup LED also indicates errors

when you use an IR 501 small matrix remote control.  The LED lights for
approximately 1 second when the switcher receives an unexpected or
out-of-sequence IR command from the remote control.  The switcher
otherwise ignores the command.