What are the tuning modes for the coupler group discussed?

1 Answer

Answer :

Automatic, semiautomatic, and manual.

Related questions

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.

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.

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

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

Last Answer : 1/4 wavelength.

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

Last Answer : Sampling energy within a waveguide.

Description : Describe a directional coupler.

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

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

Last Answer : Splice.

Description : Why is the coupler pressurized with nitrogen?

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

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.

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.

Description : Inductive tuning of a resonant cavity is accomplished by placing a nonmagnetic slug in what area?

Last Answer : The area of maximum H lines.

Description : What is the primary measurement application for tuning forks?

Last Answer : They are used to monitor fixed motor speeds.

Description : Capacitive tuning by inserting a ring into the cavity slot of a magnetron is accomplished by what type of tuning mechanism?

Last Answer : . A cookie-cutter tuner

Description : Magnetron tuning by altering the surface-to-volume ratio of the hole portion of a hole-and-slot cavity is what type of tuning?

Last Answer : Inductive.

Description : The cavities of a multicavity klystron are tuned to slightly different frequencies in what method of tuning?

Last Answer : Stagger tuning.

Description : In a multicavity klystron, tuning all the cavities to the same frequency has what effect on the bandwidth of the tube?

Last Answer : The bandwidth decreases.

Description : What limits the tuning range around the center frequency of a reflex klystron in a particular mode of operation?

Last Answer : The half-power points of the mode.

Description : What type of tuning does the receiver use?

Last Answer : Digital

Description : Which of the splices discussed is NOT a butted splice? for noninsulated splices and terminal lugs?

Last Answer : Spaghetti or heat-shrinkable tubing.

Description : In the basic transistor amplifier discussed earlier, what is the relationship between the polarity of the input and output signals?

Last Answer : The signals are opposite in polarity or 180 degrees out of phase with each other.

Description : Name the two types of monolithic IC construction discussed.

Last Answer : Diffusion; epitaxial growth

Description : If the rf amplifier discussed has an 80 milliwatt input, what would be the maximum output?

Last Answer : 800 watts.

Description : What are the three examples of metallic armor cable that were discussed?

Last Answer : Wire braid, steel tape, and wire armor

Description : What electrical property is used by all the meter movements discussed so far?

Last Answer : Current.

Description : The field arrangements in waveguides are divided into what two categories to describe the various modes of operation?

Last Answer : Transverse electric (TE) and transverse magnetic (TM).

Description : What four fiber properties determine the number of modes propagating in a multimode gradedindex fiber?

Last Answer : Numerical aperture (NA), relative refractive index difference ( D), profile parameter (α), and normalized frequency (V).

Description : Debunching of the electron bunches in the higher modes of a reflex klystron has what effect on output power?

Last Answer : Power is reduced.

Description : What are the five most prominent communications modes of operation?

Last Answer : Simplex, half-duplex, semiduplex, duplex, and broadcast.

Description : What are the transmitter operating modes?

Last Answer : Lsb, usb, isb, AM, cw, fsk.

Description : What are the two teletypewriter modes of operation?

Last Answer : Synchronous and nonsynchronous

Description : A mode filter is a device that attenuates specific modes propagating in the core of an optical fiber. What mode propagating along single mode fibers do mode filters eliminate?

Last Answer : Second-order mode.

Description : Does underfilling a multimode optical fiber excite mainly high-order or low-order modes?

Last Answer : Low-order modes.

Description : Modes of a light pulse that enter the fiber at one time exit the fiber at different times. This condition causes the light pulse to spread. What is this condition called?

Last Answer : Modal dispersion.

Description : The number of modes propagated in a multimode fiber depends on core size and numerical aperture (NA). If the core size and the NA decrease, will the number of modes propagated increase or decrease?

Last Answer : Decrease.

Description : The fiber's normalized frequency (V) determines how many modes a fiber can support. As the value of V increases, will the number of modes supported by the fiber increase or decrease?

Last Answer : Increase.

Description : As the core and cladding modes travel along the fiber, mode coupling occurs. What is mode coupling?

Last Answer : Mode coupling is the exchange of power between two modes.

Description : Modes that are bound at one wavelength may not exist at longer wavelengths. What is the wavelength at which a mode ceases to be bound called?

Last Answer : Cutoff wavelength

Description : Low-order and high-order modes propagate along an optical fiber. How are modes determined to be low-order or high order modes?

Last Answer : Depends on the bending caused by the velocity difference of the wave traveling through different mediums

Description : Reena's father works with a company that builds dams. Once he took her to the site where a dam was being built. Reena saw a group of people sitting there and shouting slogans against the ... the peaceful resolution of the conflict proved to boon for many citizens of the country. How? -Biology

Last Answer : (i) Because she convinced the people by explaining them the advantage of constructing dam and come with a solution of rehabilitation of displaced peoples. So the contribution to the peaceful resolution of ... (c) Low cost of production of electricity gives monetary gain which is a boon to citizens.

Description : What is a coupler signal ?

Last Answer : coupler signal K.

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

Last Answer : B. Diplexer

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

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

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

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

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

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

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

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 .