CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
9-1
Diagrams
This section describes the electrical operation of the instrument and modules
using the major circuit blocks or modules. Figure 9--1 on page 9--2 shows the
instrument module interconnections.
Symbols
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 S ymbols 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
Handbook
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