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relatively slow. This decreases the amount a memory ( or file
size ) by a factor 1000.
You can enter the ratio between output sample frequency
and input sample frequency directly via the resampler’s popup
menu. It is also possible to enter the output sample frequency in the menu. In that case, the ratio is calculated
automatically.
Different resampling methods are available:
• normal: The input data is sampled at the output sample times without any interpolation.
• linear: The linear interpolated input data is sampled
at the output sample times.
• average: When the ratio is smaller than 1, the mean
value of several samples of the input data is used for
each output sample. When the ratio is greater than 1,
the linear method is used.
8.14 Data collector
Use the data collector object when performing streaming
measurements. During streaming measurements, data arrives
in blocks with a size equal to the instrument’s record length.
To form a continuous stream of data, these blocks must be
appended to each other. The data collector does this job. It
will fill its data with the arriving blocks of data.
The size of the collected data can be set to a maximum of
20 million samples. When the data collector is full, different
actions can be performed:
• Continue: the oldest data is shifted out at the left, while
new data is appended to the right
• Stop: data collecting is stopped when full. (The measurement is NOT stopped.)
• Clear: the output data is cleared and the filling starts
over again
I/Os
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