Tektronix 684A User Manual

TDS 684A, TDS 744A, & TDS 784A Service Manual

This contains the block diagram and the interconnection diagram for the
TDS 684A and 7XXA Digitizing Oscilloscopes.

Graphic symbols and class designation letters are based on ANSI Standard
Y32.2–1975. Abbreviations are based on ANSI Y1.1–1972.

Logic symbology is based on ANSI/IEEE Std 91-1984 in terms of positive logic.
Logic symbols depict the logic function performed and can differ from the
manufacturer’s data.

The tilde (~) preceding a signal name indicates that the signal performs its
intended function when in the low state.

Other standards used in the preparation of diagrams by Tektronix. Inc are:

H Tektronix Standard 062–2476 Symbols and Practices for Schematic Drafting

H ANSI Y14.159–1971 Interconnection Diagrams

H ANSI Y32.16–1975 Reference Designations for Electronic Equipment

H MIL–HDBK–63038–1A Military Standard Technical Manual Writing

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