Svantek SVAN 971 - Page 144

SVAN 971 User Manual – Appendixes
144
Periodical test upper frequency 8 kHz
Linear Operating Ranges
Two measuring ranges are available: “LOW” and "HIGH".
The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below.
Table C.1.1. Linear operating range: “LOW” for the sinusoidal signal and microphone sensitivity 35 mV/Pa
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31,5 Hz
25
83
25
106
25
120
30
123
25
83
25
106
25
120
28
86
50
123
500 Hz
25
119
25
122
25
123
30
123
25
119
25
122
25
123
28
122
50
126
1 kHz
25
123
25
123
25
123
30
123
25
123
25
123
25
123
28
126
50
126
4 kHz
25
124
25
122
25
122
30
123
25
124
25
122
25
122
28
127
50
126
8 kHz
25
122
25
120
25
120
30
123
25
122
25
120
25
120
28
125
50
123
12.5
kHz
25
118
25
117
25
117
30
123
25
118
25
117
25
117
28
121
50
120
Table C.1.2. Linear operating range: „HIGH“ (primary level range) for the sinusoidal signal and
microphone sensitivity 35 mV/Pa
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31,5 Hz
35
97
35
120
35
134
40
137
35
97
35
120
35
134
38
100
60
137
500 Hz
35
133
35
136
35
137
40
137
35
133
35
136
35
137
38
136
60
140
1 kHz
35
137
35
137
35
137
40
137
35
137
35
137
35
137
38
140
60
140
4 kHz
35
138
35
136
35
136
40
137
35
138
35
136
35
136
38
141
60
139
8 kHz
35
136
35
134
35
134
40
137
35
136
35
134
35
134
38
139
60
137
12.5
kHz
35
132
35
131
35
131
40
137
35
132
35
131
35
131
38
135
60
134
Note: For the signals with the crest factor n > 1.41 upper measuring range of the RMS (LEQ
and SPL) is reduced. The valid upper limit can be calculated according to the below given
formula:
, where A is the upper limit for the sinusoidal signal
Example: For the crest factor n = 10 the upper limit is A10 = 120 dB
Measuring ranges
Reference measuring range of the acoustic pressure Low
Measuring frequency range of the acoustic pressure (-3 dB) 10 Hz ÷ 20 000 Hz.
Basic measurement error of the acoustic pressure < 0.7 dB (measured for the reference
conditions, see below).
 
2log20137 nA
n
