Svantek SV 971A, Руководство пользователя

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SV 971A User Manual
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Speed of source value changing
Speed of triggering signal changing ( Gradient ) can be set in the range from
1 dB/ms to 100 dB/ms .
Recording before trigger
When the Pre Trigger parameter is switched on, the
signal will be recorded before the first trigger. The interval
of such recording is equal to the
Trigger period (in the
attached example, 0.5 s).
►
Signal recording time
The Rec. Time parameter defines the time of signal recording after triggering. If
next trigger condition appears during the Recording Time, the signal will be
recorded for additional
Rec. Time . The available values are from 1s to 8h , or
infinitive ( Inf ).
4.6 S
ELECTING MEASUREMENT RANGE
–
R
ANGE
The Range position is used for setting one of the
available measurement ranges in the instrument.
The absolute range values depend on the calibration
factor and are shown on the
Range screen.
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There are two ranges available: Normal and Low .
The detailed description of the measurement ranges
parameters is given in Appendix C.
..
Note: The ranges at the above screens correspond to the microphone with the sensitivity within
the declared range 25 ÷ 37 mV/Pa (see Appendix C). If microphone sensitivity is other than 25
÷ 37 mV/Pa, the range will be automatically changed
.
4.7 S
ELECTING MICROPHONE COMPENSATION
–
C
OMPENSATION
F
ILTER
The Comp. Filter position is available only in the
Advanced interface mode and enables to switch on or
off compensation filters applied in the instrument.
The Microphone compensation filter (microphone inner
noise compensation) is switched on by default, however
you can switch it off for electrical measurements (e.g. for
laboratory calibration).
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