MIL-HDBK-115B(ARMY)
5.23.3 Complete documentation. Level 3 drawings may be formulated on like items when the documentation has been validated.
5.23.4 Incomplete documentation. If documentation on the candidate is incomplete or not available, the following approach may need to be taken:
a. Input/out parameters may need to be determined using data from the next higher assembly,
b. Circuit paths may need to be documented,
c. Circuit components may need to be identified and function characteristics ascertained,
d. A determination may need to be made that substitute items can be used without changing circuit parameters, and
e. An equivalent circuit design may need to be made for the candidate under consideration,
5.23.5 Design validation. Design validation of the reverse engineered circuitry may consist of one or both of the two major electronic circuit disciplines, analog and/or digital. Documentation should include the classical engineering tools and definitions.
a. Analog circuit designs should be checked for: (1) Circuit stability,
(2) Step response,
(3) Frequency response,
(4) Gain and phase linearity, (5) Slow rate,
(6) Non-linear characteristics, (7) Thermal characteristics, (8) Ripple and noise,
(9) Input/output parameter and impedances,
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