The TDF site in Issoudun is home to the Ondes Courtes (or decametric waves) rotating antennas, both analog and digital (DRM), for long-distance international broadcasting. Built in 1992, the twelve antennas are named after rivers: Volga, Danube, Amour, Oural, MeKong, Sénégal, Amazone, Mississippi, Nil, Saint Laurent, Gange and Tigre. They are capable of covering areas up to 8,000 kilometers from the point of transmission.
These 80m-high structures can be oriented at will towards any broadcast zone. In less than 2 minutes, the 200 tons of antenna can be positioned to within 1 degree of each other, enabling the various broadcast sequences to be interlinked. In Issoudun, a dedicated TDF team has the special skills required to operate these high-power transmitters.