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7.6.2
Measuring time
You can use the
Measuring time function to define how many indi
-
vidual measurements are to be performed until the measurement
sequence is stopped.
7.6.3
Summation/average
With the „Summation“ function all
individual results are used for
representing the CCF. This representation is immediately used.
If you select
„Average“, the individual results are evaluated using
a different procedure: The last performed measurement has the
largest influence on the CCF. The preceding measurement has
less influence, etc.
This procedure ensures that the CCF, with selected Average,
represents the current noise situation.
7.6.4
Mode of curve
You can change the mode how the correlation function is repre-
sented as follows:
CCF positive
z
The CCF has only positive values.
CCF pos. + neg.
z
The CCF contains positive and negative values.
TOP positive
z
The representation is similar to that of CCF positive. Peaks,
however, are represented more significantly in most cases.
TOP pos. + neg.
z
The representation is similar to that of CCF pos. + neg. Peaks,
however, are represented more significantly in most cases.
7.6.5
Correlation
If
Cross correlation
is selected, the noise source to be located
must lie within the measurement section. The measurement is
carried out with both channels (1 and 2).
With
Auto correlation
, either
channel 1 or channel 2 is used. The
second signal required for the correlation is created by the noise
reflection which is detected at the reflection point. It is required
that the signal is received by the channel which is to be used.
