Name three advantages of cw transmission

Name three advantages of cw transmission
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1 Answer

Answer :

A high degree of clarity even under severe noise conditions,  long-range operation, and narrow bandwidth.
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Related questions

What are the three requirements for cw transmission?

Description : What are the three requirements for cw transmission?

Last Answer : A method of generating oscillations, a method of turning the oscillations on and off (keying), and an antenna to radiate the energy.

What transmission method uses a stable cw reference oscillator, which is locked in phase with the transmitter frequency?

Description : What transmission method uses a stable cw reference oscillator, which is locked in phase with the transmitter frequency?

Last Answer : Pulse-Doppler.

What is the function of the oscillator in a cw transmitter?

Description : What is the function of the oscillator in a cw transmitter?

Last Answer : It generates an rf carrier at a given frequency within required limits.

How does heterodyning distinguish between cw signals?

Description : How does heterodyning distinguish between cw signals?

Last Answer : By giving a different beat frequency for each signal.

What principle is used to help distinguish between two cw signals that are close in frequency?

Description : What principle is used to help distinguish between two cw signals that are close in frequency?

Last Answer : Heterodyning.

What are the essential components of a cw receiver system?

Description : What are the essential components of a cw receiver system?

Last Answer : An antenna, tank circuit for tuning, rectifier for detection, filter to give constant output, and an indicator device

Name a disadvantage of a single-stage cw transmitter.Name a disadvantage of a single-stage cw transmitter.

Last Answer : Antenna-to-ground capacitance can cause the oscillator frequency to vary.

State the method used to increase the speed of keying in a cw transmitter.

Description : State the method used to increase the speed of keying in a cw transmitter.

Last Answer : Machine keying.

What are two advantages of ssb transmission?

Description : What are two advantages of ssb transmission?

Last Answer : It saves power and frequency bandwidth.

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what channel is cw on

Description : what channel is cw on

Last Answer : Try this: http://cwtv.com/thecw/stations

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Description : What is the 'CW'?

Last Answer : The newly named channel, the CW, used to be called the WB. It is on the same channel as the WGN news. In Chicago, that would be channel 9. In Florida it would be channel 6. and in Colorado it is on channel 26.

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What is emission F3F? A. Facsimile B. Modulated CW C. RTTY D. Television

Description : What is emission F3F? A. Facsimile B. Modulated CW C. RTTY D. Television

Last Answer : D. Television

With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Description : With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Last Answer : B. FM

Which one of the following statements for a dc machine which is provided with inter pole winding (IW) as well as compensating winding (CW) is correct a) Both IW and CW are connected in series with Armature winding b) Both IW and CW are connected in parallel with Armature winding c) IW connected in series but CW is connected in parallel with Armature winding d) CW connected in series but IW is connected in parallel with Armature winding

Description : Which one of the following statements for a dc machine which is provided with inter pole winding (IW) as well as compensating winding (CW) is correct a) Both IW and CW are connected in ... parallel with Armature winding d) CW connected in series but IW is connected in parallel with Armature winding

Last Answer : Ans: Both IW and CW are connected in series with Armature winding

What are three ways of controlling radiated emi during transmission?

Description : What are three ways of controlling radiated emi during transmission?

Last Answer : a) physical separation of the antenna (b) limiting bandwidth of the antenna (c) use of directional antennas

What three factors must be considered in the transmission of a surface wave to reduce attenuation?

Description : What three factors must be considered in the transmission of a surface wave to reduce attenuation?

Last Answer : (a) electrical properties of the terrain (b) frequency (c) polarization of the antenna

. What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?

Description : . What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?

Last Answer : (1) Type of line used, (2) dielectric in the line, and (3) length of line.

What are the three types of line losses associated with transmission lines?

Description : What are the three types of line losses associated with transmission lines?

Last Answer : Copper, dielectric, and radiation.

What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

Description : What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

Last Answer : a. Reproduces a stronger output signal. b. Greatly improves the SNR. c. Greatly reduces the natural tape hiss.

. Why are coaxial lines more efficient at microwave frequencies than two-wire transmission lines?

Description : . Why are coaxial lines more efficient at microwave frequencies than two-wire transmission lines?

Last Answer : The electromagnetic fields are completely confined

What two components make up a simple synchro transmission system?

Description : What two components make up a simple synchro transmission system?

Last Answer : A synchro transmitter and a synchro receiver.

How does temperature inversion affect radio transmission?

Description : How does temperature inversion affect radio transmission?

Last Answer : It can cause vhf and uhf transmission to be propagated far beyond normal line-of-sight distances.

What is the best type of surface or terrain to use for radio wave transmission?

Description : What is the best type of surface or terrain to use for radio wave transmission?

Last Answer : Radio horizon is about 1/3 farther.

What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?

Description : What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?

Last Answer : Pulse width

The actions of the tr and atr circuits depend on the impedance characteristics of what length of transmission line?

Description : The actions of the tr and atr circuits depend on the impedance characteristics of what length of transmission line?

Last Answer : Quarter-wavelength section

What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?

Description : What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?

Last Answer : Pulse width.

Radar altimeters use what type of transmission signal?

Description : Radar altimeters use what type of transmission signal?

Last Answer : Frequency modulated (fm).

What transmission method does NOT depend on relative frequency or target motion?

Description : What transmission method does NOT depend on relative frequency or target motion?

Last Answer : Pulse modulation.

Is it possible for a transmission line to operate improperly at certain frequencies and properly at others?

Description : Is it possible for a transmission line to operate improperly at certain frequencies and properly at others?

Last Answer : Yes, it is quite common.

What are the two common causes of transmission-line deterioration?

Description : What are the two common causes of transmission-line deterioration?

Last Answer : Corrosive effects of salt water and weather extremes.

At what points along a transmission line will a neon lamp glow the brightest?

Description : At what points along a transmission line will a neon lamp glow the brightest?

Last Answer : At standing-wave voltage peaks.

What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?

Description : What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?

Last Answer : High vswr, which equates to poor reception or a loss of power output.

On an open-ended transmission line, the voltage is always zero at what distance from each end of the line?

Description : On an open-ended transmission line, the voltage is always zero at what distance from each end of the line?

Last Answer : One-fourth the distance from each end of the line.

Two types of waves are formed on a transmission line. What names are given to these waves?

Description : Two types of waves are formed on a transmission line. What names are given to these waves?

Last Answer : Incident waves from generator to load. Reflected waves from load back to generator.

All the power sent down a transmission line from a transmitter can be transferred to an antenna under what optimum conditions?

Description : All the power sent down a transmission line from a transmitter can be transferred to an antenna under what optimum conditions?

Last Answer : When the characteristic impedance of the transmission line and the load impedance are equal.

Describe the leakage current in a transmission line and in what unit it is expressed.

Description : Describe the leakage current in a transmission line and in what unit it is expressed.

Last Answer : The small amount of current that flows through the dielectric between two wires of a transmission line and is expressed in micro ohms per unit length.

A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?

Description : A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?

Last Answer : Inductance is expressed in micro henrys per unit length, capacitance is expressed in picofarads per unit length, and resistance is expressed in ohms per unit length.

What must the physical length of a transmission line be if it will be operated at 15,000,000 Hz?

Description : What must the physical length of a transmission line be if it will be operated at 15,000,000 Hz?

Last Answer : . λ = 20 meters

What type of transmission line is often used to connect a television set to its antenna?

Description : What type of transmission line is often used to connect a television set to its antenna?

Last Answer : Twin lead.

List the five types of transmission lines in use today.

Description : List the five types of transmission lines in use today.

Last Answer : Parallel two-wire, twisted pair, shielded pair, coaxial line and waveguide.

What term is used for the end of the transmission line that is connected to an antenna?

Description : What term is used for the end of the transmission line that is connected to an antenna?

Last Answer : Output end, receiving end, load end and sink.

What term is used for the end of the transmission line that is connected to a transmitter?

Description : What term is used for the end of the transmission line that is connected to a transmitter?

Last Answer : Input end, generator end, transmitter end, sending end, and source.

In swept-frequency testing the impedance of a transmission line, what electrical characteristic is actually being measured?

Description : In swept-frequency testing the impedance of a transmission line, what electrical characteristic is actually being measured?

Last Answer : Swr on the transmission line.

What is the main advantage of using a time-domain reflectometer (tdr) to test a transmission line?

Description : What is the main advantage of using a time-domain reflectometer (tdr) to test a transmission line?

Last Answer : Tdr will indicate the nature of and the distance to or location of any faults.

What is the advantage of single-sideband (ssb) transmission over AM transmission?

Description : What is the advantage of single-sideband (ssb) transmission over AM transmission?

Last Answer : The same amount of intelligence can be transmitted with one sixth of the output power with less than one-half the bandwidth.

On the diagram below, name the elements of the vacuum tube and their potentials relative to dc ground. time is an example of what type of transmission?

Description : On the diagram below, name the elements of the vacuum tube and their potentials relative to dc ground. time is an example of what type of transmission?

Last Answer : a. Plate, positive. b. Suppressor grid, negative.

Compare the power sources of synchros and step transmission systems.

Description : Compare the power sources of synchros and step transmission systems.

Last Answer : Synchros use ac; step transmission uses dc.