The dataset (aka histogram) parameters correspond to the Histogram panel of the ValkyrieManager, and deal with configuration of data collection and retrieval of samples from a port.
The dataset parameter names all have the form PD_<xxx> and require both a module index and a port index, as well as a sub-index identifying a particular dataset.
A dataset has a number of ‘buckets’ and counts the packets transmitted or received on a port, possibly limited to those with a particular test payload id. The packet length, inter-frame gap preceding it, or its latency is measured, and the bucket whose range contains this value is incremented.
While a dataset is actively collecting samples its parameters cannot be changed.