The small displays at the front of the R&STH1 provide a direct visual feedback (even from a distance) about the current state of the transmitter system. If all of them are green, the transmitter works as desired. If one or several of the displays show an orange or red color, the transmitter indicates a warning or an alert. Moreover, each of these displays allows to monitor the most important parameters and interact on them with the transmitter like current output power, setting Local/Remote, RF on/off, selecting the active Exciter, analyzing the performance of the cooling system and so on. The big display, called System Control Panel (SCP100), offers the full picture of the transmitter including all detail information just as transistor currents. Also it provides a very comfortable way to interact with the transmitter system.