Svantek SV 973, User Manual

Page: 42 / 212

SVAN 973 User Manual 42
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).
►
Time of signal recording
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 M
EASUREMENT RANGE
–
R
ANGE
The Range position is used for checking the available
measurement range.
The absolute range values depend on the calibration
factor and are shown in the
Range screen.
The attached screens assume the calibration factor equal
to zero.
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The instrument uses two ranges
– one for the
Level Meter , 1/1 Octave , 1/3 Octave and RT60
functions (32.0 LEQ(A)
– 128.0 PEAK) and another for
the Dosimeter function (50.0 LEQ(A)
– 141.0 PEAK).
The detailed description of the measurement ranges
parameters is given in Appendix C.
Note: The calibration factor is always added to the lower and upper range level.
4.7 S
WITCHING ON COMPENSATION FILTERS
–
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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