HP E1459A gathering information

[rolfk]

You should ask Agilent about that. They manufactured those modules and know best how they work and can be accessed.

[SergeyPuzanov]

Already done that mounth ago, both Agilent and Keysight answer was like "All information is in manual".

Ok, so then maybe somebody can tell me how this module works? English is my addition language, and I can't find/understand what "positive/negative edge" is. And what is mask/unmask doing? Thanks.