Deck 10 Flashcards
Get That MONEY!!!
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- What is a megahertz (MHz)?
A unit of frequency equal to 1,000,000 hertz.
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- What is MF (MEDIUM FREQUENCY)?
The band of frequencies from 300 kHz to 3 MHZ.
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- What is a mirror image?
That part of the radiated signal of a quarter-wave antenna (Marconi antenna) appearing to come from an underground image of the real antenna. This image is also called ground reflection.
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- What is a modulated wave?
The wave that results after the information from the modulating signal is impressed onto the carrier signal. The wave that is transmitted.
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- What is modulation?
The process of adding, or superimposing, information on an RF carrier wave.
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- What is MUF (MAXIMUM USABLE FIHZQUENCYY?
The highest operating frequency that can be used at a specific time for successful radio communications between two points,
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- What is an omnidirectional antenna?
An antenna that radiates or receives equally well in all directions, except directly off the ends.
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- What is an oscillator?
An electrical circuit that generates alternating current at a particular frequency.
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- What is a parabolic antenna?
An antenna that radiates its signal back into a large reflecting surface (called the disk) for radiation.
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- What is a period (of a wave)?
The time required to complete one cycle of a waveform.
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- What is polarization (of antennas)?
The plane (horizontal or vertical) of the electric field as radiated from a transmitting antenna.
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- What is radhaz (RADIATION HAZARD)?
Electromagnetic radiation hazard generated from electronic equipment.
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- What is a radiation field?
The electromagnetic field that radiates from an antenna and travels through space.
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- What is radiation resistance?
The resistance that, if inserted in place of an antenna, would consume the same amount of power that is radiated by the antenna.
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- What is red?
Plain text or unencrypted information.
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- What is a reflected wave?
An electromagnetic wave that travels back toward the transmitter from the antenna because of mismatch in impedance between the two.
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- What is reflection?
Occurs when a radio wave strikes the Earth?s surface at some distance from the transmitting antenna and is returned upward toward the atmosphere.
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- What is RF (RADIO FREQUENCY)?
A frequency in the range within which radio waves can be transmitted. Frequencies used for radio communication fall between 3 kHz and 300 Ghz.
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- What is RF energy?
Radio frequency energy. Energy produced at the output of a transmitter.
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- What is satellite communication (SATCOM)?
A type of worldwide, reliable, high-capacity, secure, and cost-effective telecommunications system using satellites.
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- What is SHF (SUPER HIGH FREQUENCY)?
The band of frequencies from 3 Ghz to 30 Ghz.
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- What is a signal?
Detectable transmitted energy that can be used to carry information.
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- What are standing waves?
The stationary waves that build up along an antenna during radiation.
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- What is a switchboard?
Device that connects receiver outputs to numerous pieces of equipment.
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- What is SWR (STANDING-WAVE RATIO)?
A term used to express the degree of resonance attained between the antenna and the transmission line when being tuned for transmission.
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- What is a transmission line?
A device designed to guide electrical or electromagnetic energy from one point to another.
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- What is UHF (ULTRA HIGH FREQUENCY)?
The band of frequencies from 300 MHZ to 3 Ghz.
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- What is a unidirectional antenna?
An antenna that radiates in only one direction.
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- What is VHF (VERY HIGH FREQUENCY)?
The band of frequencies from 30 MHZ to 300 MHZ.
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- What is VLF (VERY LOW FREQUENCY)?
The band of frequencies from 3 kHz to 30 kHz.
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- What is a waveform?
The shape of an electromagnetic wave.
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- What is a wavelength?
The distance traveled, in feet or meters, by a radio wave in the time required for one cycle.
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- What is authentication?
A security measure designed to protect a communications or command system against fraudulent transmissions or simulation.
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- What is automatic digital network (AUTODIN)?
A worldwide automatic communications system that provides automatic data service.
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- What is beadwindow?
A term describing a real-time procedure used to alert circuit operators that an unauthorized disclosure has occurred.
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- What is a carrier?
The unmodulated signal originally produced in the oscillator section of a transmitter.
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- What is confidential?
Information the unauthorized disclosure of which could reasonably be expected to cause damage to the national security.
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- What is a cryptosystem?
Information encompassing all the associated items of crypto material that are used together to provide a single means of encryption or decryption.
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- What is the defense switched network (DSN)?
A nonsecure telecommunications telephone interconnected network among military and other government installations (formerly AUTOVON).
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- What is a directed net?
A net in which member stations must obtain permission from the net control station (NECOS) prior to communicating with other stations on the net.
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- What is emission control (EMCON)?
General or specific restrictions placed on electromagnetic radiations for a particular area or areas.
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1842.What is a free net?
A communications net of which member stations need not obtain permission of the net control station (NECOS) to transmit.
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1843.What is gateguard?
A security subsystem that allows commands to interface directly with the AUTODIN system as pan ‘ of the NSTA program.
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1844.What is a local holder?
A command or activity whose COMSEC material needs are met by drawing the material from a single CMS account.
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1845.What is the Manual Relay Center Modernization Program (MARCEMP)?
An automation support system for all aspects of HF message relay operation in the Fleet Center.
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1846.What are prosigns?
Letters, or combinations of letters, that convey frequently sent orders or instructions in a simple, standard format.
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1847.What are prowords?
The phonetic equivalent of prosigns.
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1848.What is meant by Secret?
Information the unauthorized disclosure of which could reasonably be expected to cause serious damage to the national security.
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1849.What is the secure telephone unit third generation (STU-III)?
Desktop phone unit that provides users with both clear and secure voice and data transmissions.
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1850.What is a seed key?
Special keying material used for the initial electronic set-up of the STU-III terminal.
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1851.What is a service message?
A short, concise message between communication personnel requiring prompt attention.
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1852.What is the basic objective of the Ships? 3-M System?
To provide for managing maintenance and maintenance support to help achieve maximum equipment operational readiness.
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1853.What are the 6 objective categories within the Ships? 3-M System?
Standardization, Efficiency, Documentation, Analysis, Configuration, and Scheduling.
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1854.What system provides a standardized method of planning, scheduling, and accomplishing preventive maintenance?
The Planned Maintenance System (PMS).
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1855.Where can you find ordering information for PMS Schedule Holders, Schedules, MRC Card Holders, and various 3-M OPNAV Forms?
Appendix E of COMNAVAIRFORINST 4790.2, Ships? Maintenance and Material Management (3 -M) Manual.
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1856.Who has the overall responsibility for ensuring ship maintenance is accomplished following 3-M System procedures within the command?
The Commanding Officer (CO).
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1857.Who is the Ships? 3-M System manager responsible to the CO for the overall management of the Ships? 3-M System program?
The Executive Officer (XO).
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1858.Who acts as the final review officer for maintenance responsibility shifts between departments?
The Executive Officer (XO).
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1859.Who is the functional manager of the 3-M System responsible to the X0 for the coordination and direct supervision of all administrative facets of the Ships? 3-M System program?
The 3-M System Coordinator.
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1860.What is the title of the Officer or Petty Officer assigned to provide help with the coordination and supervision of the department?s 3-M program?
The Departmental 3-M Assistant.
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1861.Who supervises maintenance scheduling within the department (such as reviewing and approving cycle and quarterly schedules) and other departmental 3-M functions?
The Department Head.
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1862.Who is responsible to the Department Head and assists in managing the maintenance required for the equipment within division responsibility?
The Division Officer.
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1863.What are Group Supervisors?
Chief Petty Officers who are responsible for two or more work centers.
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1864.Who is the senior person in a work center that is responsible for the effective operation of the 3-M System within the work center?
The Work Center Supervisor.
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1865.Where can you find a complete listing of the tools allowed (shop and technician tool kits) for each class of ship?
In the Allowance Equipage Lists (AELS) located in the Coordinated Shipboard Allowance List (COSAL).
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1866.What is the objective of the Preventive Maintenance System (PMS)?
To maintain equipment within specifications through preventive maintenance, identifying and correcting potential problems before the equipment or system becomes inoperable.
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1867.At what level is maintenance performed under the Planned Maintenance System (PMS)?
At the Organizational (O) or Intermediate (I) level.
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1868.Who reviews and approves the weekly schedules to ensure they follow the quarterly schedule?
The Division Officer.
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1869.Who ensures that the quarterly schedules are updated weekly?
The Division Officer.
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1870.Who are responsible to their work center supervisor to perform assigned scheduled maintenance requirements using MRCS, TGLs, and EGLs as indicated by the weekly schedule?
Maintenance personnel.
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1871.Which directive prevails when a difference exists between the requirements of PMS and other technical publications?
PMS requirements will prevail.
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1872.How must equipment not supported by PMS be maintained?
In accordance with existing procedures from the manufacturers, SYSCOM or BUMED technical manuals.
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1873.What are the 6 things PMS provides for?
1) Comprehensive procedures for planned maintenance of systems and equipment. 2) Minimum requirements for planned maintenance. 3) Scheduling and control of the performance of tasks. 4) Description of the methods, materials, tools, and personnel needed for maintenance. 5) Prevention or detection of hidden failures or malfunctions. 6) Test procedures to determine material readiness.
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1874.Which safety precaution category on a MRC will be listed prior to applicable step that if not followed correctly might result in death or injury?
Warning.
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1875.Which safety precaution category on a MRC will be listed prior to applicable step that if not followed correctly might result in damage to equipment?
Caution.
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1876.What basic PMS reference document is issued for each installed system for which PMS support is established?
Maintenance Index Page (MIP).
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1877.What function does each MIP serve as?
They serve as a MRC card index for the applicable system.
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1878.What number is used to identify each MRC listed on a MIP?
The SYSCOM MRC Control Number.
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1879.What does the underlining of the first 2 digits of the SYSCOM MRC Control Number indicate?
It is used to indicate new or revised MRCS.
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1880.What is the purpose of the periodicity code?
It delineates how frequently the maintenance requirement must be performed.