The even-numbered electrodes are electrically connected to one of the antenna outputs, the odd-numbered electrodes being electrically connected to the other antenna output.

Each correlator of the set of correlators correlates an inputted user code with an inputted antenna output.

In accordance with the invention, switching means (4, 8) are present having a first terminal coupled to the antenna input terminal (1) and a second terminal coupled to the antenna output terminal (2).

The antenna device comprises a signal connection of the radio transmitter's antenna output (150) to a section of the supply line inside the installation cabinet (100).

A modulator unit is present, having an input coupled to the output of the recording/reproducing unit and an output which is coupled to the antenna output terminal (2).

The reception aerial process for stationary reception has at least two individual reception aerials in which the individual aerial output signals are separately taken to a plurality of participants.

A plurality of reception signals is formed from the individual aerial output signals.