Teletype character modification unit

摘要

3. A teletype modification unit comprising: a signal shaper having input means for receiving mark-space teletype pulses; a synchronization circuit coupled to said signal shaper; a plurality of delay means coupled to said synchronization circuit; a space coincidence circuit; a mark coincidence circuit; means to selectively couple said plurality of delay means to said space coincidence circuit, and means to selectively couple said plurality of delay means to said mark coincidence circuit.