ECHOKOMPENSATOR.

摘要

The transmission link has a subscriber handset (1) connected (2) to a PLM system (3). Input and output transmissions are provided via binary converters (4,5,16,17) and coupled between them is an echo componensator circuit (10). The compensator has a subtractor stage, echo measuring stage, transversal filter and a interface memory. The echo measuring stage has a relatively large time and provides identification when the level on data (6) and reception (8) lines are the same or when the transmission is greater. When recognised the filter is adjusted to compensate.