Overview of Device Classes
Class C is the baseline with LAN capabilities, a Web interface, and IVI drivers. Class B adds expanded triggering, such as multicast and peer-to-peer communications between instruments and time-based trigger events. The time-based triggering is made possible by implementing the PTP, which can distribute a precision timing source across many Class A and B devices over a LAN. Class A devices build upon Class B devices by adding a wired trigger bus for precision triggering.
Read more about this topic: LAN EXtensions For Instrumentation
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