Larson Davis SoundExpert LxT, Руководство пользователя

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LxT Manual LxT2
B
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17
h) Inherent Noise
Inherent Noise of the LxT2:
1
combination of the electronic noise and the thermal noise of the microphone at 20°C measured in a
sealed cavity and vibration isolated
2
electronic noise of the instrument with an ADP005 in place
i) Highest Sound Pressure Level
The highest sound pressure level the Larson Davis LxT2 is designed to accommodate at the level of
overload is 139 dB. The peak-to-peak voltage at this level is 10.7 Vpp input through the ADP005.
j) Battery Power Voltage Range
The battery power supply voltage range for which the LxT2 conform to this standard:
6.4 Volts maximum
The LxT will shut down if the battery is below 4.0 Volts when used with alkaline batteries. Therefore
from 4.0 to 6.4 Volts is the usable range of battery voltages.
k) Display Device
The display device will display all levels over the entire linear operating range.
Weighting
Total Noise
1
Electrical Noise
2
A 27 26
C 27 25
Flt 32 30
Microphone/
Preamplifier
Damage Level Overload Level
Sound Pressure
Level, dB
Electrical Input
Facility, Vpeak
Sound Pres-
sure Level, dB
Electrical Input
Facility, Vpeak
375B02/
PRMLxTB
159 60 139 6