Master Drawing List

This document is a comprehensive engineering package for Digital Equipment Corporation's Multi-Station Teletype Control and Interface (LT19 series). It encompasses a wide range of technical documentation, including master drawing lists, parts lists, assembly drawings, I/O bus interface logic diagrams, module utilization details, wire lists, external component lists, baud rate tables, engineering specifications, and acceptance test procedures.

The LT19 series provides various options to expand the PDP-9 processor's teletype capabilities. The LT19A and LT19D serve as interfaces to the PDP-9, supporting the addition of up to five independent teletype control units. The LT19B and LT19E are these teletype control units, offering features like 5 or 8-bit character codes, variable start/stop codes, full or half-duplex operation, and speeds up to 110 baud (LT19B) or 30K baud (LT19E). The LT19C and LT19F variants incorporate standard EIA level converters for direct dataphone connectivity. Additionally, the LT19H provides a low-cost data communication interface using a special cable for linking two PDP-9 systems or a PDP-9 and a PDP-8.

The document also details installation data, system components, power requirements, Input/Output Transfer (IOT) instructions, device selection codes, and comprehensive procedures for acceptance testing (including voltage margin checks and diagnostic programs) and preventative maintenance, alongside lists of necessary spare parts.