Installation manual

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Unit
Noise-Emission Levels
Type
9309
9373
9375
9377
9332
9335
9335
9347
I/O Card
Unit
The following table shows the noise-emission levels for
units
of
the
system. The levels for these
units
were
measured
in
the
9309
Rack Enclosure, Model
2.
The
information is preliminary and subject to change.
LwAd
<LpA>m
Model
Hz
Operating
Idling
Opera
ting
Idling
(bels)
(bels)
(dB)
(dB)
T
1,2
60
*
* *
*
N
50
* * *
*
20
60
6.8
6.8
50 50
N
50
6.8
6.8
50
50
40
60
6.6
6.6
50
50
N
60
50
6.8
6.8
51 51
90
60
6.4 6.4
47
47
N
50
6.6
6.6
49 49
400
60
6.1
6.1
46 46
Y
50
6.1
6.1
46 46
A01
60
5.8
5.8
43 43
N
50
5.9 5.9
44
44
B01
60
7.1 7.1
54 54
N
50
7.2 7.2
55 55
60
6.5
6.5
51
51
N
50
6.5
6.5
51
51
60
6.7
6.7
50
50
N
50
6.7 6.7
50
50
Figure
A-2.
Noise
Emission
Levels
A-4
Notes:
1. * Does not radiate
any
measurable noise.
2.
Refer to "Acoustics (Noise-Emission Levels)" on
page
A-3
for definitions used in the table.
o
o