RX-8 modulators were used in the legs of Imperial AT-ATs to control the signals that made the legs move.

In 1 ABY the Rebel Alliance was looking into developing jamming devices that could interfere with the AT-AT's locomotion. When Droma Ordo learned that people working for Lady Valarian had recovered the leg of an AT-AT, he sent a Rebel agent to remove the modulator and analyze its circuitry. The schematics were sent back to Ordo.

Behind the scenesEdit

RX-8 modulators appeared in the video game Star Wars Galaxies, a massively multiplayer online-role playing game developed by Sony Online Entertainment and published by LucasArts, prior to its closure on December 15, 2011.