MIL-STD-2121A, MILITARY STANDARD: DETERMINATION OF ELECTRONIC TEST EQUIPMENT PARAMETERS (09 JUN 1992) [SUPERSEDING DOD-STD-2121] [NO S/S DOCUMENT]., This standard establishes: a, The terms to be utilized for documenting the test parameters of a weapons systems. b, A link between the parameters and the Electronic Test Equipment (ETE) required to support the weapons systems at each maintenance level. c, The functional capability required of ETE to be procured, or for comparison to know available ETE within the DOD.