Extron electronic 450 manual Reading the displayed volume

Reading the displayed volume

NOTE: This section is a detailed look at reading the output volume display on the 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), on page 63]). Other than the minimum and maximum volume, the switchers indicate the volume differently, depending on the model (see table 4 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 again — 5.5% + 1.5% = 7% volume

•Switchers with 12 and 16 input buttons — The Input 1 button blinks slowly

•Switchers with 32 input buttons — The Input 1 button lights steadily

•Push Esc (>) button twice more — 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 19 times more — 10% + (19 times 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.

When all input buttons are lit for any switcher model, the audio output is 100% of the audio input level.

CrossPoint and MAV Series Matrix Switchers • Operation 69