A Universal Tape-Controlled Programmer

The purpose of this paper is to describe a medium-speed tape-controlled programmer developed for use in automatic test equipment. This programmer is basically an electromechanical unit employing standard eight-hole paper or Mylar tape and capable of operating at speeds up to 120 memories per second. The primary features of this unit are flexibility, low cost, and reliability. Other important features include memory outputs in the form of contact closures rated at two amperes, the use of a mechanical tape reader, diode NOR logic gating, transistor drive circuits, and mercury-wetted relay memories, all of which result in a reliable yet comparatively inexpensive programming system capable of controlling both small and large equipments.