Instrumentation configurations for the performance of HEMP test procedures

The test procedures of MIL-STD-188-125, which are used to demonstrate HEMP (high-altitude electromagnetic pulse) hardness of fixed ground-based communications sites, are considered. Currently existing as a draft, the standard establishes a minimum specification for the design, engineering, fabrication, installation, and testing of ground-based facilities which perform critical, time-urgent command, control, communications, computer, and intelligence (C/sup 4/I) missions. Three categories of testing, shielding effectiveness, pulsed current injection, and low-level continuous wave (CW) immersion, are integrated in the standard's HEMP hardness evaluation process. Prototype test equipment, used to perform current injection and CW immersion procedures, was deployed in Europe to support a NATO test program which established hardness maintenance baselines for ground based C/sup 3/I facilities. The details of these tests and performance data for the mobile, integrated test equipment are presented.<<ETX>>