Extron electronic 450 Plus Series manual Reading the displayed volume

Operation, cont’d

Reading the displayed volume

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 input audio level (audio models)”. Other than the minimum and maximum volume, the switchers indicate the volume differently, depending on number (12, 16, or 32) of input buttons. See the table on the next page to read the volume display for each display scheme.

For each display scheme, the input buttons blink or light sequentially to indicate the approximate volume of the selected output. Volume is defined as a percentage of the input audio signal that is applied to the output. From 0% of volume, the first Esc () button push applies 5.5% of the input audio signal. From 5.5% on, each Esc () push applies 1.5% more of the input audio signal to the output:

•Push Esc () button — 5.5% + 1.5% = 7% volume

￿Switchers with 12 and 16 input buttons — Indicated by the Input 1 button blinking slowly.

￿Switchers with 32 input buttons — Indicated by the Input 1 button lit steadily.

•Push Esc () button twice — 7% + 1.5% + 1.5% = 10% volume

￿Switchers with 12 input buttons — Indicated by the Input 1 button blinking quickly.

￿Switchers with 16 input buttons — Indicated by the Input 1 button lit steadily.

￿Switchers with 32 input buttons — Indicated by the Input 1 and Input 2 button lit steadily.

•Push Esc () button nineteen times — 10% + (19•1.5%) = 38.5% volume

￿Switchers with 12 input buttons — Indicated by the Input 1 through 4 buttons lit steadily.

￿Switchers with 16 input buttons — Indicated by the Input 1 through 5 buttons lit steadily and the Input 6 button blinking.

￿Switchers with 32 input buttons — Indicated by the Input 1 through Input 11 buttons lit steadily and the Input 12 button blinking.

3-42 CrossPoint 450 Plus and MAV Plus Switchers • Operation