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Standard Overview Products Used in Testing Related Compliance Standards

Standard Overview

Related MIL Standards

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MIL-STD-188-125-2: HEMP Protection for Ground-Based C41 Facilities Performing Critical Missions...
MIL-STD-188-125-2 establishes minimum requirements and design objectives for high-altitude electromagnetic pulse (HEMP) hardening of transportable ground-based systems that perform critical, time-urgent command, control, communications, computer, and intelligence (C4I) missions.  MIL-STD-188-125-2 prescribes minimum performance requirements for low-risk protection from mission-aborting damage or upset due to HEMP threat environments defined in MIL-STD-2169. The standard also addresses minimum testing requirements for demonstrating that prescribed performance has been achieved and for verifying that the installed protection measures provide the operationally required HEMP hardness for the completed system. If the prescribed testing results in any hardware damage or functional upsets, the operational authority for the system will make the determination whether the observed event is mission aborting. MIL-STD-188-125-2 defines the design and testing criteria for specifically designated transportable ground-based systems in HEMP-hardened, critical, time-urgent C4I networks. Such systems include subscriber terminals and data processing centers, transmitting and receiving communications stations, and relay systems. The standard applies to both new systems and modifications of existing systems. Although only local portions of system interconnects are addressed, it is assumed that survivable long-haul communications paths, fiberoptic links, or other hardened interconnects between systems will be provided as required for mission accomplishment. Survivable C4I capabilities are essential to a credible military deterrent. This standard supports nuclear survivability objectives by providing a standardized, low-risk protection approach for transportable ground-based systems in HEMP-hardened C4I networks. These uniform requirements ensure balanced HEMP hardening for all critical systems and facilities in the
MIL-STD-461F: Electromagnetic Interference Characteristics of Equipment
MIL-STD-461F dictates the requirements for the electromagnetic compatibility (EMC) of devices and systems created for and used by the United States Department of Defense (DoD). MIL-STD-461F consists of an array of test procedures designed to help manufacturers and operators of electrical devices ensure the devices are not susceptible to electromagnetic interference (EMI) and do not create EMI themselves. The test procedures are broken up into four groups: radiated emissions (RE), conducted emissions (CE), radiated susceptibility (RS) and conducted susceptibility (CS). Procedures are named with one of the two-letter abbreviations followed by a code; for example, RE103, a radiation emissions test procedure specific to antenna spurious and harmonic outputs.        The EMC of military equipment is vital for the DoD; in military environments both at home and on the battlefield. Everything from smartphones to helicopter navigation systems produces an electromagnetic field and has the potential to compromise the safety, efficiency or secrecy of defense operations. The DoD created an Electromagnetic Compatibility Program in 1960 to address the growing concern that EMI was affecting military operations to integrate electromagnetic compatibility into defense industry R&D. The first version of MIL-STD-461 was then produced in 1967 by a joint committee of the three military branches to implement interference reduction throughout the entire DoD. Since its inception, MIL-STD-461 has been revised and expanded by the collaborative efforts of the army, navy and air force, with the most recent edition being MIL-STD-461G. The changes made between MIL-STD-461F and MIL-STD-461G can be seen below. Major differences include the removal of CS106 and the addition of CS117 and CS118. View MIL-STD-461G   Differences between MIL-STD-461F and
MIL-STD-461G: Electromagnetic Interference Characteristics of Equipment
MIL-STD-461G is the military test standard that establishes requirements for the electromagnetic compatibility (EMC) of devices and systems created for and used by the United States Department of Defense (DoD). In the pages of MIL-STD-461G, a comprehensive set of test procedures are defined to fulfill the DoD’s electromagnetic emissions and susceptibility regulations. The test procedures are broken up into four groups: radiated emissions (RE), conducted emissions (CE), radiated susceptibility (RS) and conducted susceptibility (CS). Procedures are named with one of the two-letter abbreviations followed by a code; for example, RE103, a radiation emissions test procedure specific to antenna spurious and harmonic outputs.  Detecting rogue signals and electromagnetic interference is crucial to the military, as everything from a cellphone to a navigation component on a stealth jet produces an electromagnetic field and can potentially threaten safety, efficiency or secret communications. The DoD created an Electromagnetic Compatibility Program to address the growing concern that EMI was affecting military operations with the goal of integrating electromagnetic compatibility into defense industry R&D. Ever since, the three branches of the military have collaborated to produce updated and expanded versions, culmunating in the most recent edition of the standard: MIL-STD-461G. The changes made between MIL-STD-461F and MIL-STD-461G can be seen below. Major differences include the removal of CS106 and the addition of CS117 and CS118. View the differences between MIL-STD-461F and MIL-STD-461G.   Requirement Matrix Equipment CE101 CE102 CE106 CS101 CS103 CS104 CS105 CS109 CS114 Surface Ships A A L A S L S L A Submarines A A L A S L S L A Aircraft,
MIL-STD-461G CE101, CE102: Conducted Emissions, Audio Frequency Currents and Radio Frequency...
MIL-STD-461G CE101 and MIL-STD-461G CE102 are military test standards that pertain to audio frequency currents and radiofrequency potentials for conducted emissions testing, respectively.   MIL-STD-461G CE101 MIL-STD-461G CE101 applies from 30 Hz to 10 kHz for power leads, including returns, that obtain power from other sources not part of the EUT for surface ships, submarines, Army aircraft (including flight line) and Navy aircraft. For equipment intended to be installed on Navy aircraft, this requirement is applicable only if the platform contains Anti-Submarine Warfare (ASW) equipment, which operates between 30 Hz and 10 kHz, such as Acoustic (Sonobuoy) Receivers or Magnetic Anomaly Detectors (MAD). For AC applications, MIL-STD-461G CE101 is applicable starting at the second harmonic of the EUT power frequency. This test procedure is used to verify that electromagnetic emissions from the EUT do not exceed the specified requirements for power input leads including returns.   Test Equipment The test equipment shall be as follows: Measurement receivers Current probes Signal generator Data recording device Oscilloscope Resistor (R) LISNs   Procedures The test procedures shall be as follows: a. Turn on the measurement equipment and allow sufficient time for stabilization. b. Measurement system integrity check. Evaluate the overall measurement system from the current probe to the data output device. (1) Apply a calibrated signal level, which is at least 6 dB below the applicable limit at 1.1 kHz, 3 kHz, and 9.9 kHz, to the current probe. (2) Verify the current level, using the oscilloscope and load resistor; also, verify that the current waveform is sinusoidal. (3) Scan the measurement receiver for each frequency in the same manner as a normal data scan. Verify that the data recording device indicates a level within ±3 dB of the injected level. (4) If readings are obtained which deviate by