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Page Title:
Test Point Identification Symbols. |
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|  MIL-M-81260A(AS)
Detail Parts Identification. - Detail parts shall be iden-
3.2.3.2.2.2.4
tified by reference designations when such designations are applicable. Desig-
nations shall agree with those used in related engineering drawings.
Electrical Characteristics. - For each detail part, the
3.2.3.2.2.2.5
principal electrical characteristics expressed in actual values (ohms, micro-
farads, microhenrys, etc) may be tabulated on the apron and indexed by reference
designations to applicable points on the diagram when sufficient space is not
available on the diagram itself. Values shall normally be expressed as numbers,
omitting the unit of measurement (such as ohms). However, a general note shall
state which units are used.
3.2.3.2.2.2.6
Wave Forms and Voltages. - Wave shapes, duration, and
amplitude of voltages at significant test points throughout the circuit and at in-
terconnecting points within the equipment or systems, under normal operating
conditions and other specified conditions, shall be indicated on the schematic
diagram of the component.
3.2.3.2.2.2.7
Simplified Schematic Diagram. - Simplified schematic
diagrams may be used in the preparation of material required by 3.2.3.2.2.1.
Power and Control Diagrams. - Separate diagrams shall
3.2.3.2.2.3
be prepared to show power and control circuits when it is impracticable to show
such information on overall diagrams. Each power circuit and each control
circuit with its relationship to signal circuits, using a combination of functional
and schematic diagrams as required, shall be included.
Test Point Identification Symbols. - A system of test
3.2.3.3
point identification by symbol shall be incorporated where appropriate on sche-
matics, tables, charts, and illustrations. Test point identification symbols shall
be assigned consecutively within a system or within a component.
Major Test Points. - A star-encircled test point numeral
3.2.3.3.1
(see figure 9) shall be used to identify and designate test points used in checking
overall functions of, and localizing trouble to, individual components, assemblies
(such as IF strips, oscillator circuits, or amplifier stages) and groups of com-
ponents. Major test points will always be identified on schematics, wiring dia-
grams, tables, charts, and illustrations by use of the test point numeral
1,2,3, etc, enclosed in a star, but will be referred to in the text as test point 1,
test point 2, etc. Typical examples of major test points are input terminals for
supply source voltage, high voltage output terminals of the equipment's power
system, signal input terminals of equipment, signal output terminals of the equip-
ment, input and output points of IF or A F amplifiers, oscillator circuits, and
major points of power or voltage distribution within the equipment.
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