58
SVANTEK 977W User Manual
Statistics view
The
Statistics
position is accessible only for
Sound
measurements.
Statistics is the cumulative probability density function of exceeding the noise
level during the measurement period. The X axis defines the probability of
exceeding the noise level, statistical level
LN%
, and the axis Y defines the
calculated noise level in dB.
Fields description of the Statistics view
1.
Function name
2.
Statistics plot
3.
Statistical level (LN% percentile value)
for the active cursor position
4.
Active profile (P1, P2 or P3)
5.
RMS detector (
Lin.
, or
Exp.
:
Fast
,
Slow
or
Imp
.)
6.
Averaging filter used (
A
,
B
,
C
or
Z
)
7.
The sampling interval for the LN%
values calculated by the meter (0.1 s)
8.
Cursor position
9.
Value of the selected statistical level
LN%
and units (dB)
The profile is changed after pressing the
◄
and
► push-buttons with
<Alt>
.
<Alt/
►
>
The cursor position is changed by means of
the
◄ or ► push-buttons if field
Lxx
is
selected.
The
statistical
level
and
appropriate value are presented in the line
below the plot.
Press the
◄ or ► push-buttons with
<
Shift
> to go straight to the first or last LN%
position on the screen.
►
…
6.2 Setting the units and scale of result presentation - Display Scale
The
Display Scale
sub-list enables the
user to define the result units (absolute or
logarithmic), adjust scale of plots and
switch the grid on/off.
<ENT>
2
3
8
9
1
7
4
5
6
