Pseudo counter overview¶

Pseudo counter acts like an abstraction layer for a counter or a set of counters allowing the user to see the experiment results by means of an interface which is more meaningful to him.

One example of a pseudo counter is IoverI0 useful for normalizing the measurement results in order to make them comparable.

In order to translate the counter values into the pseudo counter values, calculations have to be performed. The device pool provides PseudoCounterController class that can be overwritten to provide new calculations.

The pseudo counter value gets updated automatically every time one of its counters value gets updated e.g. when the acquisition is in progress.

Each pseudo counter is represented by a Tango device whose interface allows to obtain a calculation result (scalar value).