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38 Cards in this Set
- Front
- Back
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What is the range for the frequencies
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LF 30-300 kHz
HF 3-30 MHz VHF 30-300 MHz UHF 300 MHz-3 GHz SHF 3-30 GHz EHF 30-300 GHz |
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Where do you use LF
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long range directgion finding
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Where do you use HF
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mobile and maritime units
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Where do you use VHF
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aeronautical radio navigation and comms, radar, mobile comm
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Where do you use UHF
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line of sight comm short range
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Where do you use SHF
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SATCOMM
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Where do you use EHF
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SATCOMM with anti jam
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What is the AN/URT-23-D
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HF Transmitter
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What is the R-2368-URR
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HF receiver
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What is the SA-2112
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Red patch panel
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What is the SB-983
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Black patch panel
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What is duplex communication
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Able to transmit and receive simultaneously
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What is simplex communication
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Provides a single channel of frequency
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What does the UHF/HF relay method permit?
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Long range uninterrupted communication during periods of HERO
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Describe OTAT
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Transmitting key varible over secure comm channel for use by crypto other than device that recieved transfer crypton
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Describe OTAR
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Transmitting key varible over a secure comm channel for use only by the receiving crypto device
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What is the international worldwide SAR voice distress frequency
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123.1 MHz
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What is the international CW/MCW distress freq
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500 kHz
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What is the international voice distress freq
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2182 Khz
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What is the AN/SSQ-88
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Quality Monitoring set that contains equipmetn for measuring and analyzing signals sampled by sensors installed in each communications circuit interface
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What are the 3 types of satellites used in the Navy
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GAPFILLER
FLTSATCOM LEASAT |
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What is an active satellite
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Acts as a repeater and amplifies the signal
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What is a passive satellite
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Reflects the signals back to earth
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What is the AN/WSC-3
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UHF SATCOM transceiver
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T or F
NAVMACS serves as an automated shipboard terminal for interfacing with CUDIXS (shore-based) and the FBS |
True
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Why was DAMA developed
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To mulitplex serveral subsystems or users on one satellite channel
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What is reciprocity
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Ability of an antenna to both transmit and receive electromagnetic energy
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What is the directivity of an antenna
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Width of the readiation beam pattern
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What is omnidirectional
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When an antenna radiate and receive equally well in all directions except off the ends
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What is bidirectional
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When an antenna radiate or receive efficiently in only two directions
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What is a dummy load
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Used to tune a transmitter without causing unwanted radiation
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What is another name for a half wave antenna
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Dipole
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What is another name for a quarter wave antenna
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Marconi antenna which is omnidirectional
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What is the most common length of the whip antenna that is used
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35 foot
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What type of antenna is the AT-150/SRC
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UHF antenna
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What is the offical name of the egg beater antenna
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AS-2815/SSR 1 (used for SATCOMM)
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What are the SRA 56-57-58 and what are they used for
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Antenna couplers are used to comment one antenna to a transmitter or receiver and electronically tunes the signal to the antenna.
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What is the OA-9133
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Antenna multicoupler
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