Term
| 012-1. What activity must occur to produce an EMP? |
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Definition
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Term
| 012-2. Which two elements produce the EMP effects? |
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Definition
(1) Gamma rays.
(2) Secondary neutron radiation. |
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Term
| 012-3. What are the electromagnetic pulse forms produced by the derived environment? |
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Definition
(1) HEMP.
(2) SGEMP.
(3) SREMP. |
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Term
| 012-4. Why is high-altitude EMP environment protection important for critical, time urgent mission systems? |
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Definition
| It can affect many systems simultaneously. |
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Term
| 012-5. Why is system-generated EMP a problem for satellites and reentry vehicles? |
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Definition
| They are directly exposed to the nuclear radiation from a high-altitude burst |
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Term
| 012-6. What are the two distinct regions of importance for SREMP? |
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Definition
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Term
| 012-7. What effects on communications are there after a nuclear detonation? |
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Definition
| Scintillation and blackout. |
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Term
| 012-8. What capabilities can be employed by Milstar to mitigate communications loss within a contaminated area? |
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Definition
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Term
| 013-1. Describe the difference between long-line and local effect of EMP on facilities? |
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Definition
| Long-line effects are the currents and voltages induced on long power lines, communication cable links, or even other conductors, such as pipelines. Some of these EMP effects may be induced far away and guided to the facility along the conductor. Local effects are the currents and voltages induced directly on the facility shield, building structure, wiring, equipment cabinets, and so forth. |
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Term
| 013-2. How can a facility be survivable against EMP? |
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Definition
| To create an EMP survivability facility, it should be shielded as much as possible. Furthermore, all openings to the facility need to be filtered and protected. The facility also needs to be isolated from any external electric EM propagation in the earth. |
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Term
| 013-3. What happens in an EMP induced event? |
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Definition
| Can cause a magnetic or electric field to be induced in an electrical circuit that can cause an error in the response of the circuit. |
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Term
| 013-4. Why is bonding important in EMP protection? |
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Definition
| To ensure a mechanically strong, low impedance interconnection between metal objects. |
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Term
| 013-5. Where should all metallic penetrations entering the protected area be located? |
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Definition
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Term
| 013-6. To reduce coupling into susceptible circuits, what element is installed on both signal and power lines? |
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Definition
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Term
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Definition
| It is any electromagnetic disturbance that interrupts, obstructs, or otherwise degrades or limits the effective performance of electronics/electrical equipment. |
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Term
| 014-2. How do you differentiate an unintentional interference from jamming signal? |
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Definition
| Unintentional interference normally travels only a short distance; a search of the immediate area may reveal the source of this type of interference. Moving the receiving antenna for short distances may cause noticeable variations in the strength of the interfering signal. These variations normally indicate unintentional interference. Conversely little or no variation normally indicates enemy jamming. |
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Term
| 014-3. What type of EMI occurs when an unwanted carrier frequency follows the normal signal path through the effected receiver? |
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Definition
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Term
| 014-4. How can you eliminate broadband transmitter noise? |
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Definition
| By using a band pass filter. |
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Term
| 014-5. What type of equipment often generates many spurious emissions? |
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Definition
| Receiver responding to off frequency signals. |
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Term
014-6. What type of equipment often generates many spurious emissions? |
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Definition
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Term
| 014-7. What intermodulation frequency components can cause EMI in the receiver/transmitter? |
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Definition
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Term
| 014-8. What type of intermodulation can have a very large bandwidth and cause more severe interference problems than intermodulation products created in either transmitters or receivers? |
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Definition
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Term
| 014-9. What type of EMI occurs when high level radiated signals penetrate and induce a radio frequency voltage in the internal circuits of a system or equipment? |
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Definition
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Term
| 014-10. What AM receivers are particularly susceptible to power line noise? |
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Definition
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Term
| 014-11. Relays may cause interference inside receivers because of broadband radiated noise originating from what? |
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Definition
| The opening and closing of the contacts |
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Term
| 014-12. How would you normally eliminate electromagnetic interference caused by sodium and mercury vapor lights? |
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Definition
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Term
| 015-1. What is the purpose of the AFSIR program? |
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Definition
| Document and resolve spectrum interference problems |
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Term
| 015-2. Under the AFSIR program, what organizational level must begin an investigation to identify the source of EMI? |
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Definition
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Term
| 015-3. Why must you ensure maintenance personnel responsible for the affected equipment check it before submitting an EMI report? |
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Definition
| To ensure the equipment is not causing the problem |
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Term
| 015-4. How do you confirm an EMI problem? |
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Definition
| Check with other users of the same frequency and determine whether they receive the EMI |
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Term
| 015-5. If your EMI sounds like noise, what are the possible sources of these interferences? |
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Definition
| The source may be power lines, welding equipment, and so forth. |
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Term
| 015-6. Who is responsible for recording specific information concerning EMI? |
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Definition
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Term
| 015-7. What types of EMIs are exempt from AFSIR reporting? |
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Definition
| USAF units under the operational control of a combatant command, transient EMI from natural sources, suspected or confirmed cause of interference from space weather, interference is only experienced aboard ISR aircraft aloft and is localized when mission equipment or payload equipment is turned on/off or used, and If EMI is only affecting frequencies assigned on a noninterference basis for training purposes. |
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Term
| 015-8. How should an AFSIR report be submitted? |
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Definition
| All reports are submitted through their chain of command, through MAJCOM, and to the AFFMA. |
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Term
| 015-9. What document contains guidelines for classifying EMI reports? |
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Definition
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Term
| 015-10. What service provided by the 85 EIS analyzes and recommends corrective actions for reported EMI problems? |
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Definition
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Term
| 015-11. What is the objective of the JSIR program? |
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Definition
| Report and assist with the resolution of EW and recurring EMI |
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Term
| 015-12. Who maintains a central database of EMI cases, resolutions, and lessons-learned for all DOD EMI? |
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Definition
| JSC Joint Spectrum Center |
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