Description : What are the disadvantages of radiotelephone communications?
Last Answer : Static, enemy interference or a high local noise level.
Description : What are the three fundamental requirements of a military communications system?
Last Answer : Reliability, security, and speed.
Description : Is anyone really surprised that the US has been spying on Israeli military communications for decades?
Last Answer : answer:Oh puhleeze . Everyone is spying on everyone else. Israel makes fantastic equipment to do the job and have been monitoring us as well! No big deal. China has one of the best and most ... and is [redacted] the father. That leak would have disastrous consequences on [redacted] and [redacted]..
Description : Which of the following is the most common application of satellite? A. Surveillance B. Military application C. Communications D. Newscasting
Last Answer : C. Communications
Description : Why is detector saturation not generally a problem in fiber optic communications systems?
Last Answer : Because fiber optic communications systems operate at low optical power levels.
Description : What are the two limitations to an active satellite communications system?
Last Answer : Satellite down-link transmitter power and up-link receiver sensitivity.
Description : What was the major operational limitation of early communications satellites?
Last Answer : The lack of suitable power sources.
Description : A typical satellite communications operational link consists of a satellite and what two other components?
Last Answer : Earth terminals.
Description : What are the two types of communications satellites?
Last Answer : Passive and active.
Description : What four switched networks are part of the defense communications system?
Last Answer : AUTOVON, AUTOSEVOCOM, AUTODIN, and DSSCS.
Description : What are the five most prominent communications modes of operation?
Last Answer : Simplex, half-duplex, semiduplex, duplex, and broadcast.
Description : The naval communications system is made up of what two groups of communications?
Last Answer : Strategic and tactical.
Description : What is the main advantage of radiotelegraph communications?
Last Answer : Reliability.
Description : What are the two types of electrical communications?
Last Answer : Radio and wire.
Description : What are the four general types of communications services in the hf band?
Last Answer : Point-to-point, ship-to-shore, ground-to-air, and fleet broadcast.
Description : The transmission of still images over an electrical communications system is known as what?
Last Answer : Facsimile.
Description : What type of modulation do most analog fiber optic communications systems use?
Last Answer : Intensity modulation.
Description : A _________ sine wave is not useful in data communications; we need to send a _______signal. A) composite; single-frequency B) single-frequency; composite C) single-frequency;double-frequency D) none of the above
Last Answer : single-frequency; composite
Description : Which one is a true statement relating to project communications? a. A project sponsor is responsible for all communication methods and media. b. Different stakeholders typically have different communication needs ... project. d. Email is the only way to communicate with large numbers of people.
Last Answer : b. Different stakeholders typically have different communication needs.
Description : Which one is a true statement relating to project communications? A. A project sponsor is responsible for all communication methods and media. B.Different stakeholders typically have different communication ... project. D. Email is the only way to communicate with large numbers of people
Last Answer : B.Different stakeholders typically have different communication needs
Description : Which one is a true statement relating to project communications? a. A project sponsor is responsible for all communication methods and media. b. Different stakeholders typically have different communication ... project. d. Email is the only way to communicate with large numbers of people.
Description : What system is currently used by all branches of the military to identify test equipment?
Last Answer : Joint Electronics Type Designation System (JETDS).
Description : What is the most common type of integrated circuit packaging found in military equipment?
Last Answer : DIPs (dual inline packages).
Description : In what publication would you find guidelines for performance of military electronic parts?
Last Answer : Military Standards.
Description : What problems were evident about military electronic systems during World War II?
Last Answer : Size, weight, and power consumption.
Description : What is the new military designation for a fuse with the old military designation F05A20ROB?
Last Answer : F05B32V20A.
Description : Ferrite devices are useful in microwave applications because they possess what properties?
Last Answer : Magnetic properties and high resistance
Description : What is the filter called in which the low frequencies do not produce a useful voltage?
Last Answer : High-pass filter, low-frequency discriminator, or low-frequency attenuator.
Description : The varactor displays what useful electrical property?
Last Answer : Variable capacitance.
Description : What type of diagram would be most useful for wiring a relay into a circuit?
Last Answer : . Terminal diagram.
Description : What type of diagram is the most useful in learning the overall operation of a system?
Last Answer : A schematic diagram.
Description : What type coupling would be most useful for an audio amplifier between the first and second stages?
Last Answer : RC coupling.
Description : Energy can be inserted or removed from a cavity by what three methods?
Last Answer : Probes, loops, and slots.
Description : What two methods are used to compensate for the problems that cause low gain in an rf amplifier?
Last Answer : . RF transformers are used and the transistor is neutralized.
Description : Besides eliminating the emitter-base battery, what other advantages can different biasing methods offer?
Last Answer : Compensation for slight variations in transistor characteristics and changes in transistor conduction because of temperature variations.
Description : What are the two basic methods of scanning?
Last Answer : Mechanical and electronic.
Description : What are the two methods used for feedback coupling?
Last Answer : Inductive and capacitive.
Description : What are the two methods used by fiber manufacturers to fabricate multimode and single mode glass fibers?
Last Answer : Vapor phase oxidation and direct-melt process.
Description : When, if at all, should the heat-and-shake or the heat-and pull methods of solder removal be used?
Last Answer : These methods should not be used.
Description : What three methods are used to remove protective material?
Last Answer : Chemical, mechanical, and thermal.
Description : What two methods are used to couple energy into and out of magnetrons?
Last Answer : Loops and slots.
Description : What methods are used to prevent unwanted component interaction?
Last Answer : Ground planes, shielding, and component placement.
Description : Name the three methods of interconnecting components in multilayer printed circuit boards.
Last Answer : Clearance hole, plated-through hole, and layer build-up
Description : What are the three most common methods of interconnections?
Last Answer : Conventional printed circuit boards, multilayer printed circuit boards and modular assemblies.
Description : What two methods of manufacture are being used to eliminate bonding wires?
Last Answer : Flip-chip, beam lead
Description : What methods are used to deposit thin-film components on a substrate?
Last Answer : . Evaporation and cathode sputtering.
Description : Name the six methods of producing a voltage
Last Answer : Friction, pressure, heat, light, chemical action, and magnetism.
Description : What are the three most popular methods for encoding digital data onto magnetic disks?
Last Answer : a. Frequency modulation (FM). b. Modified frequency modulation (MFM). c. Run length limited (RLL).
Description : What are the two emi transmission methods?
Last Answer : . Conduction and radiation.
Description : Two methods describe how light propagates along an optical fiber. These methods define two theories of light propagation. What do we call these two theories?
Last Answer : The ray theory and the mode theory.