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Figure 7-2:
An illustration of the Up Sampler computed channel.
NOTE
Storing the output in memory increases the memory required for test data proportional
to the up factor. Using the output only for intermediate calculations does not affect data
storage memory.
Input Channel
The input channel can be any data type.
Output Data Type
The output data type is the same as the input data type.
Factor
Specify the desired up sample factor.
7.4.5 Smoothing Filter
The Smoothing Filter channel generates an output channel that is a smoothed
representation of the input channel without generating any phase lead or lag. The filter
is a simple boxcar filter where each output sample is the linear average of a
user-specified number of input samples. For example, for a tap count of five, the filter
averages the current sample, the two samples before and the two samples after. Note
that the channel backfills the initial output samples with the first fully filtered output
value. For example, if the tap count is nine, the first four output samples are assigned
the same value as the fifth output sample value.
NOTE
The Smoothing Filter can result in loss of data significance if not used properly. In
general, it should not be necessary for analog input channels that use digital
anti-aliasing filters. It is provided primarily for digital pulse counter inputs.
Input Channel
The input channel data type must be 32-bit float or 16-bit integer.
Output Data Type
The output data type is the same as the input data type.
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