Arrangement for automatic equalization of the distortion in data transmission channels

Claim 1

IN A PULSE DATA TRANSMISSION SYSTEM WHICH INCLUDES A DATA TRANSMITTER FOR TRANSMITTING TEST PULSES PRIOR TO DATA PULSES, SAID PULSES BEING TRANSMITTED AT A GIVEN RATE, A DATA RECEIVER FOR RECEIVING THE TEST PULSES AND DATA PULSES, A TRANSMISSION LINE CONNECTING THE DATA TRANSMITTER TO THE DATA RECEIVER AND APPARATUS IN SAID DATA RECEIVER CONTROLLED BY THE TEST PULSES FOR AUTOMATICALLY MINIMIZING THE ATTENUATION AND PHASE DISTORTION OF PULSES INTRODUCED BY THE TRANSMISSION LINE, SAID APPARATUS COMPRISING: A NETWORK OF CONTROLLED EQUALIZERS, SAID NETWORK HAVING A PULSE-RECEIVING INPUT MEANS FOR RECEIVING PULSES FROM THE TRANSMISSION LINE, A PULSE-TRANSMISSION OUTPUT MEANS AND A CONTROL INPUT MEANS; MEANS CONNECTED TO SAID PULSETRANSMISSION OUTPUT MEANS FOR PERIODICALLY SAMPLING THE AMPLITUDES OF RECEIVED TEST PULSES AT A RATE WHICH IS RELATED TO SAID GIVEN RATE AND FOR GENERATING CONTROL SIGNALS WHEN SAID AMPLITUDES ARE DIFFERENT FROM A GIVEN AMPLITUDE; AND MEANS RECEIVING SAID CONTROL SIGNALS FOR ACTIVELY CONNECTING DIFFERENT ONES OF SAID CONTROLLED EQUALIZERS BETWEEN SAID PULSE-RECEIVING INPUT MEANS AND SAID PULSE-TRANSMITTING OUTPUT MEANS OF SAID NETWORK.