High-frequency-transmission system for TV signals uses high-voltage three-phase power transmission lines and incorporates camera with signal compression circuit connected to a TFH circuit

摘要

The TV camera (3) with a signal compression circuit is connected via a flexible line (4) to a fixed TFH or power line carrier generating circuit (5). This is connected (8) to three connector rails (6) for the high-voltage three-phase supply. The signals may be transmitted along overhead wires (11) suspended on insulators (7). The signals may be transmitted through a transformer (9) to medium voltage lines (10). The TFH or power line carrier generating circuit incorporates a transformation circuit, a multiplexer and a modulator connected to a coupling circuit.