Development Test II of Time Division Digital Multiplexer TD-1069( )/G.

摘要

The US Army Electronic Proving Ground conducted a DT II of Time Division Digital Multiplexer TD-1069to determine to what extent it meets requirements of the development specification EL-CP0138-0001A and to evaluate safety,reliability,availability,and maintainability. Findings revealed that the technical performance of the TD-1069is unsatisfactory due to power supply failures during humidity cycling,lack of a tool to remove connector hex nuts,difficulty in using repair parts list,and marginal susceptibility to humidity, salf-fog,and fungus. The test item was safe to operate and maintain except for sharp corners and edges,exposed voltages in power supply module,and lack of warning labels on printed circuit boards. Human factors characteristics were satisfactory except for improper color on display panel,difficulty in installing/removing cables in shelter-mounted configuration,and inaccessibility of the channel assignment switch. The reliability,availability,and maintainability characteristics of the test item were satisfactory. Recommend the deficiencies and as many shortcomings as feasible be corrected. (Author)