Extron electronic SW AV If one or more input LEDs are lit AND the +dB LED is lit , press and

Operation, cont’d

If the +dB and -dB LED are both lit they indicate 0 dB. Otherwise, you can determine the exact gain or attenuation using the following procedure.

1.	If one or more input LEDs are lit AND the +dB LED is lit, press and
	release the	button repeatedly until the highest-numbered lit input
	LED goes out. Count the button presses. In Example 4, assume a value
	of +8 dB. It will take three presses of the		button for the Input 1 LED
	to go out.
	If one or more input LEDs are lit AND the -dB LED is lit, press and
	release the	button repeatedly until the highest-numbered lit input
	LED goes out. Count the button presses.
	If the +dB LED is lit and NO input LEDs are lit, press and release the
	button repeatedly until the +dB and -dB LED are both lit, indicating 0
	dB. Count the button presses.
	If the -dB LED is lit and NO input LEDs are lit, press and release the
	button repeatedly until the +dB and -dB LED are both lit, indicating 0
	dB. Count the button presses.
2.	Return to the original audio level setting by pressing and releasing the
	or button (the opposite of the button you pushed in step 1) the
	same number of steps you pushed the opposite arrow button in step 1.
	In Example 4, this means pushing the		button three times.
3.	Add the dB value indicated by the highest-numbered lit input LED (no
	input LEDs lit = 0 dB) and either:
	The number of button presses from 0 dB or,
	The number of button presses from when the highest-numbered input
	LED lit. In Example 4, Input 1 LED (6 dB) + 2 presses (2 dB) = 8 dB.
4.	The lit +dB or -dB LED indicates the gain (+) or attenuation (-).

EPress and release the button several times to decrease the audio level displayed in the input LEDs by 1 dB per button push. The LED flashes each time the button is pressed. Note the input LED, +dB LED, and -dB LED changes that occur each time the button is pressed and released. Figure 3-9 shows the result of pressing the button a total of nine times to change the value to -1 dB. Note that the +dB LED has turned off and that the -dB LED is on to indicate a negative level.

Press and hold

Press (9 times)

F

								E	CONF/SAVE
									B1
LED key:			= off,	= on,		= 1 blink
					B1				(9 times)
1	2	3	4	5	6	7	8		AUDIO

-dB	+dB
CONF/SAVE

E	E
E Indicates 0 dB to -6 dB range	F

Figure 3-9 — Example 4, step E: Adjusting the audio level

FPress and hold the Audio Conf/Save button until the Audio LED goes off. The input LEDs stop displaying the audio level range, the +dB and -dB LEDs go off, and the selected input LED lights.

3-10 SW AV Series Switchers • Operation