Extron electronic MAV Plus - Manual (Page 66)

Operation, cont’d
CrossPoint 450 Plus and MAV Plus Switchers • Operation 3-36
PRELIMINAR
Y
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 a maximum of 98 dB of volume attenuation available, that is adjustable in
steps of 0.5 dB, except for the fi rst step from full attenuation, which is 34.5 dB. At
maximum attenuation, no input buttons are lit, 98 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 specifi c input using the input audio level adjustment. See Viewing
and adjusting the input audio level (systems with audio BMEs). See the table on the next
page to read the volume display for each display scheme.
The input buttons light sequentially to indicate the approximate volume of the
selected output. Volume is defi ned as a percentage of the input audio signal that
is applied to the output. From 0% of volume, the fi rst Esc (
> ) button push applies
4.75% of the input audio signal and the Input 1 button fl ashes. From 4.75% on,
each push of the Esc (
> ) button applies 0.75% more of the input audio signal to the
output and the number of output buttons fl ashing or lit increases:
• Push Esc ( > ) button — 4.75% + 0.75% = 5.5% volume, indicated by the
Input 1 button lit steadily.
• Push Esc ( > ) button three more times — 5.5% + 0.75% + 0.75% + 0.75% =
7.75% volume, indicated by the Input 1 and Input 2 buttons lit steadily and
the Input 3 button fl ashing.
• Push Esc ( > ) button nineteen more times — 7.75% + (19•0.75%) = 22%
volume, indicated by the Input 1 through Input 12 buttons lit steadily.
When all input buttons are lit, the audio output is 100% of the audio input level.
Another way to view the volume level is to think in terms of the attenuation that
is applied to the output. Attenuation reduction is indicated by the lit or blinking
input buttons: when fewer input buttons are lit, attenuation is greater (and the
volume is quieter).
• At minimum volume, all input buttons are unlit or background illuminated
and 98 dB of attenuation is applied to the output. The audio output is
effectively muted.
• The fi rst step of volume increase causes the Input 1 button to fl ash.
Attenuation is reduced by 34.5 dB (63.5 dB of attenuation is applied to the
output).
• The second step of volume increase reduces the attenuation by an additional
0.5 dB (62.5 dB of attenuation is applied to the output). (The Input 1 button
lights steadily.)
• Successive steps of volume increase cause consecutive buttons to fl ash and
then light. Each consecutive lit button indicates a full 1 dB of attenuation
reduction
.
• The buttons’ volume indications are additive. For example: Input 1 lit
([34.5 dB + 0.5 dB] of attenuation reduction) and Input 2 lit [0.5 dB + 0.5 dB]
of attenuation reduction) indicate that the output attenuation has been
reduced
by a total of 36 dB:
(34.5 dB + 0.5 dB + 0.5 dB +0.5 dB = 36 dB).
• At full volume, no attenuation is applied to the output and all input buttons
are lit steadily.
See the table on the next page to read the volume display.