Figure 4-3.-Precise-access blocked diagram.

Figure 4-3.-Precise-access blocked diagram.

Figure 4-4.-Functional circuit symbols used on precise-access block diagrams.

Notice that concise text, suitable to the component being

code is realized on high-level diagrams where much

described, replaces the circuit elements in the respective

information must be confined to a small space.

blue-shaded area. Paragraph numbers, references to

illustrations, complete sentence structures, and formal

PRECISE-ACCESS BLOCKED DIAGRAM

grammatical rules are not necessary to impart all needed

information. The use of facing pages, similar block

A precise-access blocked diagram is the next higher

arrangements of text and components being described,

level diagram (fig. 4-3). It emphasizes levels of physical

enables a rapid association between text and blocks, text

containment (units, assemblies, and so on) of the

and circuit detail, and circuit detail and blocks. Like the

components with respect to their enclosures. Four basic

blocked schematic, each blue-shaded area includes a

shapes are used as symbols on this diagram to show the

circuit-identifier code for identification of the

kind of circuit through which the signal is being

components being described. The greatest value of this

processed. These symbols are shown in figure 4-4.

4-4