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107
SVAN 979 User Manual
When the
Averaged
or
Instantaneous
spectrum is selected, you can additionally
enable presentation of the
Max
and/or
Min
values for each band by switching the
Max
or
Min
parameters on.
The
Max
and
Min
spectrum is presented as
a stepped line
– red and blue colour.
=>
NR and NC results view
In case of 1/1 octave Sound measurements
(
S:1/1
) with HP or Z filter, noise rating (
NR
)
and noise criterion (
NC
) values can be
additionally presented on the same plot as a
main spectrum when the
NR
or/and
NC
parameter is enabled.
=>
A violet line shows the
NR
results for the octave bands with central frequencies:
31.5Hz
,
63.0Hz
,
125Hz
,
250Hz
,
500Hz
,
1.00kHz
,
2.00kHz
,
4.00kHz
and
8.00kHz
. A blue line shows the
NC
results for the octave bands with
central frequencies:
63.0Hz
,
125Hz
,
250Hz
,
500Hz
,
1.00kHz
,
2.00kHz
,
4.00kHz
and
8.00kHz
.
To enable the cursor to read the
Max
,
Min
,
NR
or
NC
values, select the result field in the
lower left-hand corner of the display with the
▲ / ▼ key. Then select the appropriate
value with the
◄ / ► key pressed together
with
<Alt>
.
<Alt/
►
>
The
NR
or
NC
results can be seen also in
the
1 Profile
and/or
3 Profile
modes.
If the
NC
or
NR
result exceeds the maximum
value for which the curves are defined
(NC=70 or NR=130) then before the
displayed result the character (
>
) appears
and the highest defined curve is displayed.
You can easily get into the
Spectrum View
screen from the
Spectrum
view to change
viewed spectra by selecting the result field
in the lower left-hand corner of the display
with the ▲ / ▼ key and pressing
<ENTER>
.
<ENT>
10.3.4
Spectrum statistics
The instrument calculates statistics in Sound modes for all 1/1 - 1/12-octave bands as well as for Total results
based on 100 ms Leq results. Special Ln spectrum view presents
Lnn
results for all 1/1 - 1/12-octave bands
and Totals.
To view statistics for the selected band you
should:
1. Select the
1/1
-
1/12
field with the ▲ /
▼ key.
2. Activate
the
Ln spectrum
view,
changing the field content to the
1/1 Ln
-
1/12 Ln
with the
◄ / ► key pressed
together with
<Alt>
.
<Alt>/
►
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