Hello FX,
The Digital square and filter algorithm is used in the Universal DSP component. More details can be found in the datasheet of the component that can be accessed using the help button in the component properties.
Please contact me at ahmad.atieh@optiwave.com to discuss further.
The last paragraph on the signal power is not clear. Could you please elaborate on what do you mean by DSP make the signal power rise?
Regards,
Ahmad