Teleports have a great deal of built-in test equipment, yet for mobile earth stations, which due to their size, do not have room for built in test equipment; Test Loop Translators (TLTs) and Satellite Simulator Systems are valuable tools to ensure smooth operations. Both solutions simulate a satellite link for test and alignment of systems, and whilst the applications for TLT’s and Satellite Simulators may be similar, there are some fundamental differences that are important to understand before deciding which is best for your set-up.