Extron electronic MPX Plus 866 A manual Viewing and adjusting the input audio level, Vcr

Operation, cont’d

Viewing and adjusting the input audio level

The audio level of each input can be displayed and adjusted through a range of -18 dB to +24 dB to ensure that there is no noticeable volume difference among sources (figure 3-6). The audio level can be adjusted from the front panel or under serial port or Ethernet control.

dBu	VU
+24	21
+21	18
+19	15
+16	12
+13	9	VCR
+10	6
+7	3	Audio
+4	0
+1	-3	Inputs
-2	-6
-5	-9
-8	-12
-12	-15
-15	-18
-18	-21

Low Audio

Output Level

1	2	3	4	5	6	7	8	9	10 11 12 13 14
1	2	3	4	5	6			9	10 11 12 13 14

dBu	VU
+24	21
+21	18
+19	15
+16	12
+13	9
+10	6
+7	3
+4	0
+1	-3
-2	-6
-5	-9
-8	-12
-12	-15
-15	-18
-18	-21

Output

Level

PRELIMINARY

					MPX PLUS 866 A
dBu	VU			MPX Plus 866 A			Audio System
+24	21
+21	18
+19	15
						No noticeable
+16	12
+13	9					volume differences
+10	6	Audio
+7	3
+4	0	Inputs
+1	-3
-2	-6
-5	-9
-8	-12
-12	-15
-15	-18
-18	-21
High Audio
Output Level			CD Jukebox
Figure 3-6 — Audio gain and attenuation
1.	Press the Esc button to clear any input buttons, output buttons, or control
	buttons that may be lit.
2.	To enter Audio mode, press and hold the Audio button until the button begins
	to blink red, then release the button.
3.	Press and release an input button to select an input. The output buttons
	display audio level and polarity (+ or –) for the selected input. Each output
	button indicates 1 dB of gain or attenuation when blinking slowly, 2 dB when
	blinking quickly, and 3 dB when lit steadily. Green output buttons indicate a
	gain (+) audio level and red buttons indicate an attenuation (–) level. See the
	table on the next page.
4.	Press and release the Esc (>) and View (<) buttons to increase and decrease
	the audio level.
5.	Press and release the Audio button to exit the Audio mode. The Audio button
	stops blinking.

3-34 MPX Plus 866 A Media Presentation Matrix Switcher • Operation