Tektronix TDS7054, Service Manual

Page: 239 / 254

TDS7104 & TDS7054 Service Manual
9- 1
Diagrams
This section describes the electrical operation of the TDS7000 Digital Oscillo-
scope and modules using the major circuit blocks or modules. Figure 9--1 on
page 9--2 shows the oscilloscope 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 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
Handbook