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119
SVAN 979 User Manual
Note: Although the instrument generates pink noise, the Signal Generator position of the Instrument
section is unavailable in the RT60 function.
The
Noise Margin
parameter defines the margin value to the calculated noise
level (for more detail see Appendix E). This parameter can be set in the range
0.0 dB
÷
20.0 dB
with 0.1 dB step (default value is
10.0 dB
).
Note: If the measurement must fulfil the ISO 3382 standard requirements the noise margin is
required to be set to 10 dB (or higher).
The
Logger Name
position allows you to
define the name of the logger file in which
data of the
RT60
analysis will be recorded.
The name can be up to eight characters
long. After pressing the
◄ / ► key, the text
editor screen is opened.
►
The
Level
position defines the threshold level of the sound source for triggering
the RT60 measurement. If the measured sound is below the
Level
value, the
RT60 measurement will not start. The parameter can be set in the range
24
÷
136
dB
with 1 dB
step (default value is
100 dB
).
For the
Impulse
method, the source is Leq(1) integrated by 0,5 milliseconds.
For the
Decay
method, the source is Leq(1) integrated by 1 second. It also
should be stable within ±0,5 dB for 2 seconds.
12.3 C
ONFIGURING
RT60
VIEWS
The
Display
section contains elements for
programming
measurement
result
presentation and display parameters.
The
Display Modes
list allows you to select
the type of data displayed during the
RT60
calculations.
<ENT>
Time data can be viewed as a
Raw Data
,
Smoothed Data
(or
Integrated Data
in case of
Impulse
method).
You may also switch between different data view modes during measurement in the presentation mode. For
this purpose, it is necessary to select the field with
Raw
,
Smoothed
or
Integrated
text (at the right upper corner
of the display) and change its content with the
<Alt>
and
◄ / ► key pressed together.
<Alt/
►
>
<Alt/
►
>
Содержание SVAN 979
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