Larson Davis System 824 - Page 483

9/13/00 C-15
AC/DC output: AC out 1 is flat
weighted and follows
the gain (tip); AC out 2
is C-weighted with 0 dB
gain (ring)
Measurement range: Flat is measured to
ANSI S1.4 and IEC
60651 standards for
SLM linearity. 1/3 and 1/
1 octave filters are mea-
sured to IEC 1260 stan-
dard for Class 0
linearity which is ±0.3
dB. The numbers in the
table represent SPL lev-
els with a typical 2541
microphone that has
44.1 mV/Pa sensitivity.
Measurement Range (RTA mode only)
0dB Gain 10dB Gain 20db Gain 30dB Gain 40dB Gain 50dB Gain
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
FLAT
32 48 128 80 25 38 118 80 21 33 108 75 21 33 98 65 26 38 88 50 23 40 78 38
1/3 Octave Filters
16.0
2 45 128 83 2 35 118 83 1 25 108 83 2 25 98 73 -1 28 88 60 1 23 78 55
31.5
3 43 128 85 1 35 118 83 1 23 108 85 2 25 98 73 -4 22 88 66 -4 23 78 55
63.0
4 40 128 88 0 33 118 85 1 23 108 85 0 22 98 76 -7 15 88 33 -7 18 78 60
125
2 40 128 88 -2 27 118 91 -3 28 108 80 -2 18 98 80 -9 11 88 77 -8 8 78 70
250
3 37 128 91 -3 25 118 93 -3 15 108 93 -4 15 98 83 -10 8 88 80 -9 8 78 70
500
12 33 128 95 4 25 118 93 -3 15 108 93 -4 13 98 85 -10 6 88 82 -10 8 78 70
1000
10 32 128 96 2 20 118 98 -4 15 108 93 -5 13 98 85 -10 6 88 82 -10 8 78 70
2000
15 32 128 96 6 20 118 98 -2 15 108 93 -5 13 98 85 -8 8 88 80 -8 8 78 70
4000
14 32 128 96 7 20 118 98 0 15 108 93 -2 13 98 85 -6 8 88 78 -6 8 78 70
8000
14 32 128 96 7 20 118 98 1 15 108 93 -1 13 98 85 -2 12 88 76 -3 13 78 65
16000
15 36 128 92 9 25 118 93 2 15 108 93 1 15 98 83 0 15 88 73 1 18 78 60
1/1 Octave Filters
16.0
2 50 128 78 2 40 118 78 1 30 108 78 2 30 98 68 -1 33 88 55 1 28 78 50
31.5
3 48 128 80 1 40 118 78 1 28 108 80 2 30 98 68 -4 27 88 61 -4 28 78 50
63.0
4 45 128 83 0 48 118 70 1 28 108 80 0 37 98 61 -7 20 88 68 -7 23 78 55
125
2 45 128 83 -2 32 118 86 -3 31 108 77 -2 23 98 75 -9 26 88 62 -8 13 78 65
250
3 42 128 86 -3 30 118 88 -3 20 108 88 -4 20 98 78 -10 13 88 75 -9 13 78 65
500
12 38 128 90 4 30 118 88 -3 20 108 88 -4 18 98 80 -10 11 88 77 -10 13 78 65
1000
10 37 128 91 2 25 118 93 -4 20 108 88 -5 18 98 80 -10 11 88 77 -10 13 78 65
2000
15 37 128 91 6 25 118 93 -2 20 108 88 -5 18 98 80 -8 13 88 75 -8 13 78 65
4000
14 37 128 91 7 25 118 93 0 20 108 88 -2 18 98 80 -6 13 88 78 -6 13 78 65
8000
14 37 128 91 7 25 118 93 1 20 108 88 -1 18 98 80 -2 17 88 71 -3 18 78 60
16000
15 41 128 87 9 30 118 88 2 20 108 88 1 20 98 78 0 20 88 68 1 23 78 55