With the 81134A it is easy to add jitter to any kind of data or clock signal. This is very useful if you need to test the jitter tolerance of your circuit designs, e.g. data receivers or clock recovery circuits. The 54855A Infiniium Scope allows you to measure and characterize the jitter that disturbs your signals. Knowing the details about the jitter makes it much easier to identify the source of the jitter and to debug it.