User Guide Manual
Operation, cont’d
MTPX Twisted Pair Matrix Switchers • Operation
3-34
PRELIMINARY
Input LED
dB of
attenuation
Output
volume
760%
8 7 6 5 4 3 2 1
1
12 11 10 9 16 15 14 13
8 7 6 5 4 3 2 12 11 10 9 16 15 14 13
60
56
10%
5.5%
7%
8.5%
16%
63
62
61
52
22%
17.5%
19%
20.5%
55
54
53
11.5%
13%
14.5%
59
58
57
48 28%
23.5%
25%
26.5%
51
50
49
44 34%
29.5%
31%
32.5%
47
46
45
36 46%
41.5%
43%
44.5%
39
38
37
28 58%
53.5%
55%
56.5%
31
30
29
20 70%
65.5%
67%
68.5%
23
22
21
12 82%
77.5%
79%
80.5%
15
14
13
4 94%
89.5%
91%
92.5%
7
6
5
40 40%
35.5%
37%
38.5%
43
42
41
32 52%
47.5%
49%
50.5%
35
34
33
24 64%
59.5%
61%
62.5%
27
26
25
16 76%
71.5%
73%
74.5%
19
18
17
8 88%
83.5%
85%
86.5%
11
10
9
0 100%
95.5%
97%
98.5%
3
2
1
= on, = blinking, = off
Audio output volume settings, 16 button switcher
• Successivestepsofvolumeincrease
cause consecutive LEDs to first blink,
then light steadily. (On switchers with
32 input buttons, each consecutive LED
indicates a 1 dB attenuation reduction
when blinking and a 2 dB attenuation
reduction when lit.)
For example: When lit steadily, the
Input 3 LED indicates the following,
depending on the number of input
buttons the switcher has:
Switchers with 16 input buttons —
52 dB of attenuation when compared
to the Input 3 LED blinking (53 dB to
55 dB of attenuation). The blinking
Input 4 LED (49 dB to 51 dB of
attenuation) is at least 2 dB less
than the blinking Input 3 LED
(53 dB minus51dB)andatmost6dB
less (55 dB minus 49 dB).
Switchers with 32 input buttons —
58dBofattenuationwhencompared
to the Input 3 button blinking (59 dB
of attenuation). The blinking Input 4
LED(57dBofattenuation)is3dB
less than the steadily-lit Input 2 LED
(60dBminus57dB).
• On switchers with 32 input buttons, the
buttons’ volume indications are additive.
For example: Input 1 lit (23 dB
[22dB+1dB]ofattenuation reduction),
Input 2 lit (2 dB[1dB+1dB]of
attenuation reduction), and Input 3
blinking (1 dB of attenuation reduction)
indicate that the output attenuation
has been reduced by a total of 25 dB
(22 dB+2 dB+1 dB = 25 dB).
• Atfullvolume,noattenuationisapplied
to the output and all input buttons are lit
steadily.
See the tables at left and on the next page to
read the volume display.