Larson Davis SoundTrack LxT, Руководство пользователя

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A-18 Technical Specifications LxT Manual
.
Table A-17 Filter Skirts of 1kHz 1/3 Octave Filter
Sound Level Meter Model: LxT1 Serial Number: 0000033 Firmware:
Certificate of 1000.0 Hz Third Octave Filter Shape
This Sound Level Meter (including attached PRMLXT1 preamplifier and ADP005 18pF input adapter) was calibrated with a
reference 1kHz sine wave. The instrument's 1000.0 Hz filter response was then electrically tested using a 137.00 dBSPL sinewave
at selected frequencies as specified in IEC 61260-am1 (2001-09). Instrument is in normal OBA range. Instrument has +20dB gain.
0.00
10.00
-10.00
-20.00
-30.00
-40.00
-50.00
-60.00
-70.00
-80.00
-90.00
-100.00
100 1000 10000
Le
v
e
l (
d
B
)
Frequency (Hz)
Freq
(Hz) Measured
(dB)
Uncert
(dB)
Limits
(dB)
185.46 -90.61 0.10 -70.00, -inf
327.48 -82.27 0.10 -61.00, -inf
531.43 -68.01 0.10 -42.00, -inf
772.57 -75.25 0.10 -17.50, -inf
891.25 -2.50 0.10 -2.00, -5.00
919.58 -0.29 0.10 +0.30, -1.30
947.19 0.01 0.10 +0.30, -0.60
974.02 -0.00 0.10 +0.30, -0.40
1000.00 -0.00 0.10 +0.30, -0.30
Freq
(Hz) Measured
(dB)
Uncert
(dB)
Limits
(dB)
1026.67 -0.00 0.10 +0.30, -0.40
1055.75 0.00 0.10 +0.30, -0.60
1087.46 -0.14 0.10 +0.30, -1.30
1122.02 -2.56 0.10 -2.00, -5.00
1294.37 -93.15 0.10 -17.50, -inf
1881.73 -97.63 0.10 -42.00, -inf
3053.65 -96.71 0.10 -61.00, -inf
5391.95 -97.53 0.10 -70.00, -inf
Uncertainties are given as expanded uncertainty at ~95% confidence level (k=2).
This instrument is in compliance with IEC 61260-am1 (2001-09) (Class 0) and ANSI S1.11-2004 (Class 0).
Technician: Leroy H Test Date: 05 Apr 2005 17:38:11