MIL-STD-188-125-2: High-Altitude Electromagnetic Pulse (HEMP) Protection For Ground-Based C4I Facilities Performing Critical, Time-Urgent Missions (Transportable Systems)

The MIL-STD-188-125-2 standard creates the requirements and objectives for design regarding a systems ability to comply with high-altitude electromagnetic pulse (abbr. HEMP) hardening (resistive) of transportable ground-based systems with features of time-urgent command, control, communications, computer, and intelligence (abbr. C4I) missions. Specifically, this is a series with a companion specification of MIL-STD-188-125-1, with the only difference that for this specification, this addresses only transportable systems, whereas MIL-STD-188-125-1 addresses fixed facilities. In other words, this addresses the minimum requirements for showing a predetermined performance has been achieved and for verifying installed protection measures provide operationally required HEMP for the completed system.

System examples include, and are not limited to, subscriber terminals and data processing centers, transmitting and receiving communications stations, and relay systems under the assumption that long-haul communications paths, fiber optic links, or other hardened interconnects between systems are provided as required as such in the field. These are specifically itemized out in the specification under Section 5: Detailed Requirements. These relate to transportable systems such electrical shielding enclosures or fixed rooms in buildings (or the building itself), as long as the unit fulfills the sole purpose of the specification: the owner will determine if the observed event is mission aborting (passing criteria).

The test setup is the same as other shielding effectiveness, with the determination of the dynamic range and the actual measurement of the signal for the sample in question. If the system involves a weapon enclosure, all internal components need removed such that only the enclosure is being tested.

Keystone Compliance has the capabilities to test any size of enclosure to MIL-STD-188-125-2. We have tested large items such as entire on-site installation buildings and small items that can be easily transported to our lab.

Are you ready to partner with Keystone Compliance to determine the shielding effectiveness of your product when tested to the requirements of MIL-STD 188-125-2? Let’s get started!