ECA 213
ECA 213 1958-JAN-01 Test Pont Locatons for Prnted Wrng Assembles
All test points shall be compatible in ali respects with the latest issue of EIA Standard RS-188, Standard Dimensional System for Automation Requirements.
All test points shall be brought out to any three edges of the printed wiring board whenever possible.
There are two preferred test-point location systems, A and B. A third system, C, can be usedwhen it is impractical to bring the test points to the edge of the board.