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 : 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 : 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 : 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 : List the three parts of a fiber optic data link
Last Answer : Transmitter, optical fiber, and receiver.
Description : Which part of a fiber optic transmitter converts the processed electrical signal to an optical signal?
Last Answer : The optical source.
Description : Fiber optic connectors can reduce system performance by increasing what two types of noise?
Last Answer : Modal and reflection.
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 : 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 : List the three types of cable designs being considered by the Navy.
Last Answer : Optical fiber cable component (OFCC), stranded, and ribbon cables designs.
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 : 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 : 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 three parts of a fiber optic transmitter?
Last Answer : Interface circuit, source drive circuit, and an optical source.
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 : 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 : 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 : What effect does noise have on the fiber optic signal?
Last Answer : Noise obscures or reduces the quality of the signal.
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 : When will fiber optic cable be cheaper?
Last Answer : Prices on my optic cable since update have stayed the same BUT the speed is six or seven times as faster.
Description : Why Fiber Optic Cable is Safe in Data Transport ?
Last Answer : Optical fiber cable is safe for data transfer. It is a coating made of plastic or other materials , which protects the fiber from moisture , abrasion , sprains and other natural disasters. With ... Due to the high electrical resistance, this cable can be used with high voltage electrical equipment.
Description : What are the insulators used to make fiber optic cable ?
Last Answer : The insulators used to make fiber optic cable are Silicon Dioxide and Muli Component Glass (Soda Boro Silicet , NaOH Silicet etc.).
Description : Can fiber optic cable be used for transmitting light from a source to another point around the opaque object?
Last Answer : Fiber Optic is normally used for carrying data as light; I doubt it'd be useful for actually transmitting coherent light.
Description : Where can I buy fiber optic cable?
Last Answer : I recommend Stonewall Cable Inc. I bought some there and have been happy with it. Check out Cables Plus USA, they have great prices and fast shipping.
Description : Which type of fiber-optic cable is the best for very high speed data? a. Single-mode step-index b. Multimode step-index c. Single-mode graded-index d. Multimode graded-index
Last Answer : a. Single-mode step-index
Description : Which type of fiber optic cable is most widely used? a. Single-mode step-index b. Multimode step-index c. Single-mode graded-index d. Multimode graded-index
Description : A popular light wavelength in fiber-optic cable is a. 0.7 um b. 1.3 um c. 1.5 um d. 1.8 um
Last Answer : b. 1.3 um
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 : The core of a fiber optic cable is made of a. Air b. Glass c. Diamond d. Quartz
Last Answer : b. Glass
Description : Which of the following is not a common type of fiber-optic cable? a. Single-mode step-index b. Multimode graded-index c. Single-mode graded-index d. Multimode step-index
Last Answer : c. Single-mode graded-index
Description : The operation of the fiber-optic cable is based on the principle of a. Refraction b. Reflection c. Dispersion d. Absorption
Last Answer : b. Reflection
Description : Which of the following is not a common application of fiber-optic cable? a. Computer networks b. Long-distance telephone systems c. Closed circuit TV d. Consumer TV
Last Answer : d. Consumer TV
Description : What medium is used by IBM token ring network that operates at either 4 Mbps or 16 Mbps? A. Twisted pair B. Coaxial cable C. Fiber-optic D. Parallel-wire line
Last Answer : A. Twisted pair
Description : Ho w many times bigger does the bandwidth of a fiber optic multimode have over a cable? A. 50 times bigger B. 100 times bigger C. 10 times bigger D. 5 times bigger
Last Answer : B. 100 times bigger
Description : If a fiber optic system has a rise time of 38.55 ns, the source rise time is 12 ns and the detector rise time is 12 ns, what is the cable rise time? A. 34.61 ns B. 14.55 ns C. 52.55 ns D. 26.25 ns
Last Answer : A. 34.61 ns
Description : Fiber optic cable operates near _______ frequencies. A. 800 THz B. 20 MHz C. 200 MHz D. 2 GHz
Last Answer : A. 800 THz
Description : If a fiber optic system has a rise time of 16 ns, the source rise time is 1.5 ns and the detector rise time is 2 ns, what is the cable rise time? A. 14 ns B. 6 ns C. 9 ns D. 12.5 ns
Last Answer : A. 14 ns
Description : ECE Board Exam March 1996 It is a spacecraft placed in orbit around the earth carrying onboard microwave receiver and transmitting equipments. A. Fiber optic equipment B. Communications satellite C. Wireless radio system D. Coaxial cable syste
Last Answer : B. Communications satellite
Description : _____uses fiber-optic cable. A) 10Base5 B) 10Base2 C) 10Base-T D) 10Base-F
Last Answer : 10Base-F
Description : The HFC network uses _______ cable. A) twisted-pair B) coaxial C) fiber-optic D) acombination of (b) and (c)
Last Answer : fiber-optic
Description : The traditional cable TV system used ________cable endto end. A) twisted-pair B) coaxial C) fiber-optic D) none of the above
Last Answer : coaxial
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 : ___ cable can carry signals ofhigher frequency ranges than_____ cable. A) Twisted-pair; fiber-optic B) Coaxial; fiber-optic C) Coaxial; twisted-pair D) none of the abov
Last Answer : Coaxial; twisted-pair