M7018

This document is an Engineering Change Order Log for the Digital Equipment Corporation M7018 A/D Control module, used with the PDP-11 processor. It details three engineering changes:

1. M7018-00001 (Oct-72): Corrected manufacturing flaws on "B" revision boards, specifically a missing circuit etch (requiring a wire addition) and improperly spaced capacitors. Immediate rework of affected boards was required.
2. M7018-00002 (Mar-73): Corrected print errors through a documentation change only.
3. M7018-C0003 (Jan-74): Addressed functional and compatibility issues for the M7018 when used with specific peripherals (LPSAD-12, lpsam-sg, BA408). This involved adjusting PST and MC delays by modifying capacitor values and performing detailed wiring changes to the dual sample and hold logic. Implementation required a phase-in by March 1974 and field rework when installing the specified peripherals.