3-33
MPX 866 A Media Presentation Matrix Switcher • Operation
PRELIMINAR
Y
When all input LEDs are lit, the
audio output is 100% of the
audio input level.
Another way to think of
the volume level is in terms
of the attenuation applied
to the output. Attenuation
reduction is indicated by the
lit or blinking input LEDs:
when fewer input LEDs are lit,
attenuation is greater (and the
volume is decreased).
• At minimum volume,
all input LEDs are unlit
and 98 dB of attenuation
is applied to the output.
The audio output is
effectively muted.
• The
fi rst step of volume
increase causes the Input
1 button to blink slowly.
Attenuation is reduced
by 35 dB (63 dB of
attenuation is applied to
the output).
• The second step of
volume increase reduces
the attenuation by an
additional 1 dB (62 dB of
attenuation is applied to
the output).
• Successive steps of
volume increase cause
consecutive LEDs to
blink slowly, blink
quickly, and then light
steadily.
• At full volume, no
attenuation is applied to
the output and all input
LEDs are lit steadily.
See the table at right to read the
volume display.
8
7
Input LED
dB of
attenuation
S
F
98
6
5
4
3
2
1
8
7
6
5
4
3
2
1
59
Output
volume
0%
5.5%
7%
63
62
8.5%
10%
61
60
11.5%
13%
14.5%
58
57
16%
17.5%
19%
56
55
54
12
11
10
9
12
11
10
9
S
F
25
56.5%
58%
29
28
59.5%
61%
27
26
62.5%
15
71.5%
73%
19
18
74.5%
76%
17
16
77.5%
S
F
5
86.5%
86%
9
8
89.5%
91%
7
6
92.5%
S
F
30
49%
50.5%
34
33
52%
53.5%
32
31
55%
20
S
F
64%
65.5%
24
23
67%
68.5%
22
21
70%
10
S
F
79%
80.5%
14
13
82%
83.5%
12
11
85%
0
S
F
94%
95.5%
4
3
97%
98.5%
2
1
100%
53
20.5%
S
F
S
F
31%
32.5%
46
45
34%
35.5%
37%
44
43
42
41
38.5%
22%
23.5%
52
51
25%
26.5%
28%
50
49
48
47
29.5%
S
F
S
F
S
F
40%
41.5%
40
39
43%
44.5%
46%
38
37
36
35
47.5%
S
F
= on, = blinking fast, = blinking slowly, = off
Audio output volume settings
im Vertrieb von
CAMBOARD Electronics
www.camboard.de
Tel. 07131 911201
Fax 07131 911203
