To test GUIs, you need a way to simulate user input, wait until the generated events have been broadcast to all listeners, and then check the result as the GUI would appear to the user.

A broadcast message can also be sent using the MessagingUtility portlet (Figure 33) by entering a message in the enter message input field and then selecting Submit (Figure 39).

This article discusses the security broadcast, the synchronization in every input signal and how to improve the quality of singal in TV Live broadcast.