Larson Davis System 824 Reference Manual page 477

NOTE: Ranges are in dBSPL using a
typical 2541 microphone with a sensitiv-
ity of 44.5 mV/Pa. A 2540 low sensitivity
microphone produces high limit values
approximately 10.0 dB higher.
NOTE: Ranges are in dBSPL using a
typical 2541 microphone with 44.1 mV/
Pa sensitivity. The range is measured
between a low limit of peak error > 0.5
dB and a high limit of overload.
9/13/00
Peak Measurement Range (LOG and ISM modes only)
Low Limit
A-WT (high) 73
A-WT (normal) 53.0
A-WT (low) 53.0
C-WT (high) 73
C-WT (normal) 53.0
C-WT (low) 53.0
FLAT (high) 80
FLAT (normal) 60.0
FLAT (low) 60.0
SSA Mode Specifications (IEC 61260 Class 1)
Overall time weighting:
1/3 octave filter time
weighting:
Dynamic range:
Linearity range:
Pulse range:
RMS noise floor:
Reference level range:
Exchange rates:
Sample rate:
1/3 octave band fre-
quencies:
Filter integrated
response:
High Limit Range
148 75
128.0 75.0
108.0 55.0
148 75
128.0 75.0
108.0 55.0
148 68
128.0 68.0
108.0 48.0
Slow, Fast, Impulse,
TWA and Peak
Slow, Fast
> 93 dBA (overload to
noise floor)
> 80 dBA
> 83 dBA
< 33 dBA typical with
PRM902, 2541 micro-
phone, and 0 dB gain
0 dB gain
3, 4, 5, or 6 dB
51,200 Hz
12.5 Hz - 20 kHz
≤ ±0.15dB for all filters.
C -9