Description : List five common fiber optic transmitter packages.
Last Answer : TO can, DIP, butterfly lead microcircuits, circuit cards, and stand-alone optical fiber converters.
Description : What are the three parts of a fiber optic transmitter?
Last Answer : Interface circuit, source drive circuit, and an optical source.
Description : Which type of fiber optic connector (butt-jointed or expanded beam) brings the prepared ends of two optical fibers into close contact?
Last Answer : Butt-jointed connectors.
Description : Which types of LEDs are the preferred optical sources for short-distance, low-data-rate fiber optic systems?
Last Answer : SLEDs and ELEDs.
Description : List the two principal optical detectors used in fiber optic systems.
Last Answer : The semiconductor positive-intrinsic-negative (PIN) photodiode and avalanche photodiode (APD).
Description : What effect does noise have on the fiber optic signal?
Last Answer : Noise obscures or reduces the quality of the signal.
Description : Delay differences between the source wavelengths occur as the optical signal propagates along the fiber. What is this called?
Last Answer : Differential group delay t(l).
Description : Which type of optical fiber (multimode or single mode) tends to have lower loss and produces less signal distortion?
Last Answer : Single mode fiber.
Description : What mechanisms in the fiber waveguides weaken and distort the optical signal?
Last Answer : Scattering, absorption, and dispersion.
Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned
Last Answer : d. all of the mentioned
Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Last Answer : D. all of the mentioned
Description : What specifications does physical layer provides __________. A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned
Last Answer : d) all of the mentioned
Description : List the types of fiber optic components considered part of a fiber optic cable plant.
Last Answer : Optical fiber cables, connectors, splices, mounting panels, jumper cables, and other passive components.
Description : What is the device used in fiber optic communication which consist of a receiver transmitter use to clean up and amplify digital data moving in one direction and another in the opposite direction? A. Optic compressors B. Optic retarders C. Optic isolator D. Optic regenerators
Last Answer : D. Optic regenerators
Description : Calculate the total rise time for a fiber-optic system if the transmitter, receiver, and cable each have a rise time of 50 nanoseconds.
Last Answer : 86.6 nanoseconds
Description : Fiber-optic cable cannot be used: a. in an explosive environment b. to connect a transmitter to an antenna c. to isolate a medical patient from a shock hazard d. none of the above
Last Answer : b. to connect a transmitter to an antenna
Description : The device which converts sound energy into electrical enemy is called – (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter
Last Answer : (3) Microphone Explanation: A microphone converts sound energy to electrical energy this energy level is used as an output using same energy level, amplified or it could be used to record those ... coil within a strong magnetic field. The induced current duplicates the frequency of the sound wave.
Description : The device which converts sound energy into electrical energy is called (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter
Last Answer : Microphone
Description : SONET stands for ∙ a. System Optical Network ∙ b. Synchronous Optical Network ∙ c. Silica Optic Network ∙ d. System Optical Fiber Net
Last Answer : ∙ b. Synchronous Optical Network
Description : Which of the following is used as an optical transmitter on the Fiber Optical Communications? a. APD b. LSA diode c. PIN diode d. LED
Last Answer : d. LED
Description : The different angles of entry of light into an optical fiber when the diameter of the core is many times the wavelength of the light transmitter is known as ________. A. refraction B. sensor C. mode D. emitter
Last Answer : C. mode
Description : Which of the following is used as an optical transmitter on the Fiber Optical Communications? ∙ a. APD ∙ b. LSA diode ∙ c. PIN diode ∙ d. LED
Description : Microphone converts sound energy into ------? A. Microwaves B. Electrical signals (Answer) C. Optical Signals D. Heat energy
Last Answer : B. Electrical signals (Answer)
Description : An increase in light intensity produces fast optic switching due to ∙ a. Increase in index of glass ∙ b. Amplification of optical signal ∙ c. High gain ∙ d. Photoconductivity
Last Answer : b. Amplification of optical signal
Description : What is the difference between passive and active fiber optic couplers?
Last Answer : Passive couplers redistribute optical signals without optical-to electrical conversion.
Description : The Navy classifies fiber optic connectors in what two ways?
Last Answer : Light-duty and heavy-duty connectors.
Description : Fiber optic connectors can reduce system performance by increasing what two types of noise?
Last Answer : Modal and reflection.
Description : What connection properties result in fiber optic connector coupling loss?
Last Answer : Poor fiber alignment and end preparation, fiber mismatches, and Fresnel reflection.
Description : Define a fiber optic splice.
Last Answer : A permanent fiber joint whose purpose is to establish an optical connection between two individual optical fibers.
Description : Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?
Last Answer : Splice.
Description : What are the two types of output interfaces for fiber optic transmitters?
Last Answer : Optical connectors and optical fiber pigtails.
Description : What are the two basic types of preamplifiers used in fiber optic receivers?
Last Answer : The high-impedance amplifier and the transimpedance amplifier.
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 is a fiber optic receiver?
Last Answer : An electro-optic device that accepts optical signals from an optical fiber and converts them into electrical signals
Description : List five precautions to take when installing fiber optic systems on board naval ships.
Last Answer : a. Never bend an optical fiber or cable at a radius of curvature less than the minimum bend radius. b. Never pull fiber optic cables tight or fasten them over or through sharp corners or ... the hardware. e. Allow only trained, authorized personnel to install or repair fiber optic systems.
Description : Why is it generally only necessary to refer to point-to-point data links when discussing the process of fiber optic system design?
Last Answer : Because fiber optic systems that incorporate complex architectures can be simplified into a collection of point-to-point data links before beginning the design process.
Description : What type of modulation do most analog fiber optic communications systems use?
Last Answer : Intensity modulation.
Description : List four system topologies that can be constructed using point-to-point fiber optic links.
Last Answer : Linear bus, ring, star, and tree topologies.
Description : What is the main disadvantage of using fiber-optic cables?
Last Answer : High attenuation.
Description : In fiber optic systems, designers consider what trade-offs?
Last Answer : Trade-offs in fiber properties, types of connections, optical sources, and detector types in military and subscriber-loop applications.
Description : List the three parts of a fiber optic data link
Last Answer : Transmitter, optical fiber, and receiver.
Description : Describe the basic functions of a fiber optic data link
Last Answer : The basic functions of a fiber optic data link are to convert an electrical input signal to an optical signal, send the optical signal over an optical fiber, and convert the optical signal back to an electrical signal.
Description : In a fiber-optic cable, the signal is propagatedalong theinner core by _______. A) reflection B) refraction C) modulation D) none of the above
Last Answer : reflection
Description : Band loss is ∙ a. A reduction in transmitter power caused by earth’s surface curvature ∙ b. A reduction in strength of the signal caused by folded dipole bends ∙ c. An attenuation increase caused by bends radiating from the side of the fiber ∙ d. All of these
Last Answer : c. An attenuation increase caused by bends radiating from the side of the fiber
Description : Which of the following is not a major benefit of fiber-optic cable? a. Immunity from interference b. No electrical safety problems c. Excellent data security d. Lower cost
Last Answer : b. No electrical safety problems
Description : Which of the following is not a major benefit of a fiber-optic cable? ∙ A. immunity from interference ∙ B. no electrical safety problems ∙ C. excellent data security ∙ D. lower cost
Last Answer : ∙ D. lower cost
Description : Which of the following is not a major benefit of fiber-optic cable? ∙ a. Immunity from interference ∙ b. No electrical safety problems ∙ c. Excellent data security ∙ d. Lower cost
Description : A step transmitter is a modification of what electrical device?
Last Answer : Rotary switch.
Description : Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?
Last Answer : T-coupler