What is a coupler signal ?

What is a coupler signal ?
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coupler signal K.
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A component that samples the microwave signal travelling in one direction down to the transmission line A. Isolator B. Combiner C. Directional coupler D. Attenuator

Description : A component that samples the microwave signal travelling in one direction down to the transmission line A. Isolator B. Combiner C. Directional coupler D. Attenuator

Last Answer : C. Directional coupler

Which one is an antenna coupling unit? A. Coupler B. Diplexer C. Lecher wire D. Duplexer

Description : Which one is an antenna coupling unit? A. Coupler B. Diplexer C. Lecher wire D. Duplexer

Last Answer : B. Diplexer

Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Description : Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Last Answer : D. To prevent re-radiation of the local oscillator

Best choice of transmission line component to couple a coaxial line to a parallel-wire line A. Shorting B. Balun C. Slotted line D. Directional coupler

Description : Best choice of transmission line component to couple a coaxial line to a parallel-wire line A. Shorting B. Balun C. Slotted line D. Directional coupler

Last Answer : B. Balun

Referred to as a ferrite device that can be used in lieu of a duplexer to isolate a microwave transmitter and receiver when both are connected to the same antenna. A. Isolator B. Circulator C. Coupler D. Diode.

Description : Referred to as a ferrite device that can be used in lieu of a duplexer to isolate a microwave transmitter and receiver when both are connected to the same antenna. A. Isolator B. Circulator C. Coupler D. Diode.

Last Answer : B. Circulator

A device that connects two dissimilar networks and performs the protocol conversion. A. Gateway B. Coupler C. Transformer D. Converter

Description : A device that connects two dissimilar networks and performs the protocol conversion. A. Gateway B. Coupler C. Transformer D. Converter

Last Answer : A. Gateway

To couple a coaxial line to parallel line, it is better to use a ______. A. Slotted line B. Quarter-wave transformer C. Directional Coupler D. Balun

Description : To couple a coaxial line to parallel line, it is better to use a ______. A. Slotted line B. Quarter-wave transformer C. Directional Coupler D. Balun

Last Answer : D. Balun

To connect coaxial line to a parallel-wire _________ is the best to use. A. directional coupler B. quarter-wave transformer C. balun D. slotted line

Description : To connect coaxial line to a parallel-wire _________ is the best to use. A. directional coupler B. quarter-wave transformer C. balun D. slotted line

Last Answer : C. balun

What is an opto-coupler IC?

Description : What is an opto-coupler IC?

Last Answer : Opto-coupler IC is a combined package of a photo-emitting device and a photosensing device.Examples for opto-coupler circuit : LED and a photo diode, LED and photo transistor, LED and Darlington. Examples for opto-coupler IC : MCT 2F , MCT 2E .

When a coupler nut is subjected to crushing stress, crushing failure can be avoided if _____ a. crushing stress induced is more than permissible crushing stress in the nut b. permissible crushing stress is more than crushing stress induced in the threads c. crushing stress induced is equal to permissible crushing stress d. all of the above

Description : When a coupler nut is subjected to crushing stress, crushing failure can be avoided if _____ a. crushing stress induced is more than permissible crushing stress in the nut b. permissible crushing ... threads c. crushing stress induced is equal to permissible crushing stress d. all of the above

Last Answer : b. permissible crushing stress is more than crushing stress induced in the threads

Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides

Description : Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides

Last Answer : d) Waveguides

Bus coupler is very essential in arrangement (a) single bus (b) double bus, double breaker (c) main and transfer bus (d) all of the above

Description : Bus coupler is very essential in arrangement (a) single bus (b) double bus, double breaker (c) main and transfer bus (d) all of the above

Last Answer : (c) main and transfer bus

What happens to reflected energy that enters a directional coupler that is designed to sample incident energy?

Description : What happens to reflected energy that enters a directional coupler that is designed to sample incident energy?

Last Answer : . The reflected energy adds at the absorbent material and is absorbed.

in a directional coupler that is designed to sample the incident energy, what happens to the two portions of the wavefront when they arrive at the pickup probe?

Description : in a directional coupler that is designed to sample the incident energy, what happens to the two portions of the wavefront when they arrive at the pickup probe?

Last Answer : The wavefront portions add.

What is the purpose of the absorbent material in a directional coupler?

Description : What is the purpose of the absorbent material in a directional coupler?

Last Answer : Absorb the energy not directed at the pick-up probe and a portion of the overall energy

How far apart are the two holes in a simple directional coupler?

Description : How far apart are the two holes in a simple directional coupler?

Last Answer : 1/4 wavelength.

What is the primary purpose of a directional coupler?

Description : What is the primary purpose of a directional coupler?

Last Answer : Sampling energy within a waveguide.

Describe a directional coupler.

Description : Describe a directional coupler.

Last Answer : A fiber optic coupler that prevents the transfer of power between input fibers.

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?

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

Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?

Description : Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?

Last Answer : Splice.

Why is the coupler pressurized with nitrogen?

Description : Why is the coupler pressurized with nitrogen?

Last Answer : To aid in heat transfer and prevent corona and arcing

What is the purpose of an antenna coupler

Description : What is the purpose of an antenna coupler

Last Answer : It matches the impedance of an antenna to that of a transmission line at any desired frequency.

What are the tuning modes for the coupler group discussed?

Description : What are the tuning modes for the coupler group discussed?

Last Answer : Automatic, semiautomatic, and manual.

To measure incident power, you must rotate the coupler detector of the wattmeter so that the arrow indicating power flow points toward which end of the transmission line?

Description : To measure incident power, you must rotate the coupler detector of the wattmeter so that the arrow indicating power flow points toward which end of the transmission line?

Last Answer : Load.

When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Description : When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Last Answer : D. detector sensitivity

A coupler which consists of a series of lenses and a partly reflective surface ∙ a. Beam-splitting coupler ∙ b. Reflective star coupler ∙ c. Fused coupler ∙ d. None of these

Description : A coupler which consists of a series of lenses and a partly reflective surface ∙ a. Beam-splitting coupler ∙ b. Reflective star coupler ∙ c. Fused coupler ∙ d. None of these

Last Answer : ∙ a. Beam-splitting coupler

In SONET, OC-1 stands for: a. Optical Carrier level one b. Optical Coupler unidirectional c. Optical Channel one d. Optical Cable type 1

Description : In SONET, OC-1 stands for: a. Optical Carrier level one b. Optical Coupler unidirectional c. Optical Channel one d. Optical Cable type 1

Last Answer : a. Optical Carrier level one

One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

Description : One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

Last Answer : d. To prevent reradiation of the local oscillator

To couple a coaxialline toa parallel-wire line,itisbesttouse a a. slotted line b.balun c. directional coupler d. quarter-wave transformer

Description : To couple a coaxialline toa parallel-wire line,itisbesttouse a a. slotted line b.balun c. directional coupler d. quarter-wave transformer

Last Answer : b.balun

Fortransmission-line loadmatchingover a range offrequencies,itisbesttouse a a. balun b. broadband directional coupler c. double stub d. single stub of adjustable position

Description : Fortransmission-line loadmatchingover a range offrequencies,itisbesttouse a a. balun b. broadband directional coupler c. double stub d. single stub of adjustable position

Last Answer : c. double stub

What maximum load would you place on a right angle coupler?

Description : What maximum load would you place on a right angle coupler?

Last Answer : 630kg (or 630kgf or 6.25kN)

What is the height of the base lift (kicker lift) on a typical tube and coupler scaffold? a. 225mm (9 inches) b. 300mm (12 inches) c. 150mm (6 inches) d. 100mm (4 inches)

Description : What is the height of the base lift (kicker lift) on a typical tube and coupler scaffold? a. 225mm (9 inches) b. 300mm (12 inches) c. 150mm (6 inches) d. 100mm (4 inches)

Last Answer : c. 150mm (6 inches

P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Description : P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Last Answer : (A) a rectifier.

Describe the working of directional coupler with neat diagram.

Description : Describe the working of directional coupler with neat diagram. 

Last Answer : Directional couplers are devices that will pass signal across one path while passing a much smaller signal along another path.  One of the most common uses of the directional coupler is to ... . The frequency determines the separation of the two holes as a fraction of the wavelength.  

Draw a neat sketch of ‘Locomotive coupler’ mechanism. Explain its working in brief.

Description : Draw a neat sketch of ‘Locomotive coupler’ mechanism. Explain its working in brief.

Last Answer : Figure: Coupler Rod of Locomotive  (Link AD = Link BC = Crank Link CD = Coupling Rod Link AB = Fixed Link = Frame) Working of Coupler Rod of Locomotive: It is an ... center distance between them. This mechanism is meant for transmitting rotary motion from one wheel to the other wheel.

Explain triggering of SCR using opto-coupler. State its advantages.

Description : Explain triggering of SCR using opto-coupler. State its advantages. 

Last Answer : Triggering of SCR using opto-coupler:  A simple opto-coupler based triggering circuit for SCR is shown in the figure. An optocoupler or opto-isolator is a combination of light source ... is small size and light weight device. iii)Interfacing with logic circuits is easily possible.

Why is a shaft coupler used between turbine and generator ?

Description : Why is a shaft coupler used between turbine and generator ?

Last Answer : For easy transmission torque or rotation angle and can also use for the protection of the safety devices shaft cannot be separated from the shaft during motion coupling will be damaged first so as avoid to the damaged of motor or other transmission parts.

Write working of opto coupler as an isolator.

Description : Write working of opto coupler as an isolator.

Last Answer : Optocoupler is as shown in fig. it consist of LED as an light source and phototransistor act as light detector.  When input pulse is applied LED turns ON.Light emitted by LED focused on CB ... starts flowing.As input pulse reduces to zero LED turns OFF collector current becomes zero. 

In a directional coupler:

Description : In a directional coupler:  (1) Isolation (dB) equals coupling plus directivity (2) Coupling (dB) equals isolation plus directivity (3) Directivity (dB) equals isolation plus coupling (4) Isolation (dB) equals (coupling) (directivity)

Last Answer : In a directional coupler: Isolation (dB) equals coupling plus directivity.