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| 61. (221) Any military action involving the use of the electromagnetic (EM) spectrum to include directed energy to attack an enemy is called a. electronic support (ES). b. electronic warfare (EW). c. electromagnetic pulse (EP). d. electromagnetic interference (EI). |
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| 62. (221) Which is not an example of electronic protection (EP)? a. Frequency agility in a radio. b. Communications intelligence. c. Electronic and material shielding for systems. d. Process to counter meaconing, interference, jamming, and intrusion. |
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| 63. (221) Which electronic warfare (EW) component responds to taskings to search for, intercept, identify, and locate intentional and unintentional sources of radiated energy? a. Electronic attack (EA). b. Electronic control (EC). c. Electronic support (ES). d. Electronic protection (EP). |
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| 64. (222) Electromagnetic (EM) deception as it applies to electronic warfare (EW) is a. controlling the information an enemy receives. b. the elimination of some or all of an adversary’s electronic defenses. c. the deliberate radiation of EM energy intended to convey misleading information to an enemy. d. degrading or interfering with the enemy’s use of the EM spectrum to limit the enemy’s combat capabilities. |
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| 65. (223) What is the process of unscrambling encrypted information so that it is intelligible? a. Decryption. b. Encryption. c. Cryptography. d. Cryptanalysis. |
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| 66. (224) How many selectable traffic key slots does the KG–84A have? a. 1. b. 2. c. 4. d. 8. |
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| 67. (224) Which switch on the KY–57 VINSON zeroizes channels one through five? a. Fill. b. Mode. c. Power. d. Volume. |
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| 68. (225) The common name for the method of changing the encryption keys over the radio channel in a two-way radio system is called a. over-the-air-rekeying (OTAR). b. Asymmetric. c. symmetric. d. off-line. |
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| 69. (225) Centralized control of encryption keys will not reduce a. procedural problems. b. operational problems. c. security problems. d. safety problems. |
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| 70. (226) In frequency hopping (FH) operation, the interval at which each transmitter remains on a given frequency for a specific time is known as the a. dwell time. b. hopping rate. c. frequency offset. d. transmitter velocity. |
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| 71. (227) Which RT–1523 SINCGARS subassembly removes synchronization and frequency hopping information that is embedded in a receive signal? a. The interleaver. b. The modulator. c. The demodulator. d. The exciter/power amplifier module. |
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| 72. (227) The RT–1523 SINCGARS radio’s time sync and correlator module manipulates control signal outputs during the frequency hopping (FH) mode to a. stop frequency shifts during receive operations. b. shut down reception only during frequency shifts. c. shut down transmission only during frequency shifts. d. shut down reception and transmission during frequency shifts. |
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| 73. (228) Concerning HAVE QUICK II communications (MWOD), how long can each word of day (WOD) be used? a. Each WOD is used until it is manually changed. b. For a total of 3 days. c. For 48 hours. d. For 24 hours. |
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| 74. (229) Which one of the following statement is not a characteristic of the AN/GRC–171B(V)4 transceiver? a. It operates from 116 MHz to 149.975 megahertz (MHz). b. It provides antijam communications in amplitude modulation (AM) and frequency modulation (FM). c. It contains both HAVE QUICK and HAVE QUICK II. d. It can communicate on any one of 7,000 available channels. |
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| 75. (229) What does the low-pass filter of the AN/GRC–171B(V)4 transceiver perform? a. Image frequency rejection in receive and harmonic attenuation in transmit. b. Image frequency rejection in transmit and harmonic attenuation in receive. c. RF decoupling in transmit and harmonic suppression in receive. d. RF decoupling in receive and harmonic suppression in transmit. |
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| 76. (229) The output power of the AN/GRC–171B(V)4 transceiver is a. 25 Watts in both amplitude modulation (AM) and frequency modulation (FM). b. 20 Watts in AM, 50 Watts in FM. c. 20 Watts in AM, 20 Watts in FM. d. 50 Watts in narrowband, 25 Watts in wideband. |
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| 77. (230) The Joint Tactical Information Distribution System (JTIDS) is commonly referred to as a. Link 4A. b. Link 11. c. Link 16. d. Link 22. |
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| 78. (231) Which service uses the Enhanced Position Location Reporting System (EPLRS) to locate and track amphibious assault craft? a. Army. b. Navy. c. Marines. d. Air Force. |
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| 79. (231) What type of network radio does the Air Force use for close air support? a. Single Channel Ground and Airborne Radio System (SCGARS). b. Enhanced Position Location Reporting System (EPLRS). c. Joint Tactical Information Distribution System (JTIDS). d. Situation Awareness Data Link (SADL). |
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| 80. (232) How many programmable devices can the multiband inter/intra team radio hold? a. 3. b. 5. c. 7. d. 10. |
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