Norsonic nor118, Инструкция по эксплуатации

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44 Chapter 8
Adding markers to a measurement
45 Norsonic Nor118
User Guide
Adding markers to a
measurement
H
    a measurement where you later
found out that you desperately need to know what
caused the level to be what it turned out to be?
Enter source coding . With the enhanced profile option
(optional extension ) you may tag or code sources as they
happen. A one digit code (which appears in the display as
1~4) is entered to later serve as an identification of the type
of noise. is can also be referred to as adding a marker
to the measurement.
Example:
In a traffic noise measurement a bus passing
may be identified by the digit “1”, while trucks may be
identified by “2”, unexpected vehicles by “3” etc.
In the profile display the markers appear as dots or lines
below the graph. If you move the time cursor onto such
a dot, the marker type (i.e. its number) will appear in the
display.
During a measurement, adding any of the markers 1,
2 and 3 will assign the corresponding marker number to
the current period only.
Adding marker number 4, however, will assign this
marker to the current period plus all consecutive peri-
ods until the marker again is deactivated. is marker
type is often referred to as a toggle marker, as opposed
to the single marker which is the other type. A typical
application for a toggle marker is to mark out intervals of
particular interest.
What were these impulses caused by?