Extron electronic 450 Plus Series manual Adjust the input audio level

Operation, cont’d

4. Press and release the View () button once (figure 3-62) to decrease the input audio level by 1 dB.

Press and release the View () button several more times (figure 3-62) to decrease the input audio level by 1 dB per button push. Note the output button indication changes that occur each time the View () button is pressed.

Figure 3-62 shows the result of pressing the View () button a total of 9 times. Note that the level is now displayed in red to indicate a negative level.

Press the View button to decrease the input audio level by 1 dB per button push.

VIEW

Red				Unlit
											• The output buttons display the selected input's
										O	audio level and polarity (gain or attenuation).
1	2	3	4	5	6	7	8	15	16		• Each output button indicates 1 dB when lit.
										U
										T	When the buttons are lit green, they indicate a
										P	gain (+) audio level.
17	18	19	20	21	22	23	24	31	32	U	When the output buttons are lit red, they
										T
											indicate an attenuation (-)level.
										S

• In this example, the output buttons display an audio attenuation level of -1 dB.

Unlit

Figure 3-62 — Adjust the input audio level

Figure 3-63 shows the same level (–1 dB) as in figure 3-62, but displayed on a 16-output-button switcher, such as a MAV Plus 1616 A.

Blinking	Unlit
Red

1 2 3 4 5 6 7 8 9 16

OUTPUTS

In this example, the output buttons display an audio gain level of -1 dB.

Figure 3-63 — Level display on a 16-output-button switcher

Figure 3-64 shows the same level (–1 dB) as in figure 3-62, but displayed on a 8-output-button switcher, such as a CrossPoint 450 Plus 128 HVA.

Slowly	Unlit
Blinking Red

1 2 3 4 5 6 7 8

OUTPUTS

In this example, the output buttons display an audio gain level of +8 dB.

Figure 3-64 — Level display on a 8-output-button switcher

3-40 CrossPoint 450 Plus and MAV Plus Switchers • Operation