Extron Electronics MAV 44_48_84_88 Series User Guide - Manual (Page 30)

Operation, cont’d
MAV 44 / 48 / 84 / 88 Matrix Switchers • Operation 3-6
10 Down ( ) button and LED — The button decreases the audio gain for a
selected input. Press and release the button to decrease the gain by 1 dB or
press and hold the button to decrease the gain by 3 dB per second until the
button is released or the lower limit is reached.
On 4-output switchers, this button and LED stand alone.
On 8-output switchers, this button and LED are secondary functions of the
Output 7
button and LED.
The LED flashes once in Audio Setup mode to indicate each 1 dB decrease in
the input audio gain. See “Adjusting input audio gain and attenuation” on
page 3-19.
The LED lights steadily in Audio Setup mode to indicate that the
adjustment has reached the maximum attenuation (-18 dB).
11 Up ( ) button and LED — The button increases the gain for a selected
input. Press and release the button to increase the audio level by 1 dB or press
and hold the button to increase the audio level by 3 dB per second until the
button is released or the upper limit is reached.
On 4-output switchers, this button and LED stand alone.
On 8-output switchers, this button and LED are secondary functions of the
Output 8 button
and LED.
The LED flashes once in Audio Setup mode to indicate each 1 dB increase in
the input audio gain. See “Adjusting input audio gain and attenuation” on
page 3-19.
The LED lights steadily in Audio Setup mode to indicate that the
adjustment has reached the maximum gain (+10 dB).
Operations
The following paragraphs detail the power-up process and then provide sample
procedures for creating ties, sets of ties, and configurations; changing a
configuration; viewing ties, sets of ties, and configurations; saving a preset;
recalling a preset; viewing and adjusting the audio level, and selecting the front
panel security lockout.
Powering up the switcher
1 . Plug in the switcher. On all switcher models, power is automatically applied
when the power cord is connected to an AC source. When AC power is
applied, the switcher performs a self-test and initialization that blinks the
front panel LEDs on and off from left to right. A successful power up self-test
and initialization leaves the power LED on, the Video and Audio LEDs on
(audio/video models only)
, and all other LEDs off.
The current configuration, all presets, and all input audio levels are saved in
non-volatile memory within 5 seconds of a change or exiting Audio Setup
mode. When power is applied, the most recent configuration is retrieved.
The previous presets remain intact.
Wait at least 5 seconds after changing any configuration, saving a preset, or
exiting Audio Setup mode. Before 5 seconds have elapsed, changes that you
have made may not have been saved.
If an error occurs during the self-test, the switcher locks up and does not
operate. If your switcher locks up on power-up, call the Extron S
3 Sales &
Technical Support Hotline.