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The question is troubling, and the "fact" it appears to assume is unclear.
-- The power level used for transmission without modulation is irrelevant, since
the transmission without modulation has no application or purpose other than
scientific experiment, and it makes no difference how far away it can or can't be
heard.
-- Modulated in the form of intermittent CW (as in Morse Code, pulse-width
modulation etc.), the instantaneous power level doesn't change, but its duty-
cycle changes, as it's turned on and off as a means of conveying information.
-- When amplitude modulated (AM), the power level of the carrier is constant,
the power of the AM modulation stages is added to the transmission, and goes
into creating the sidebands.
-- When frequency- or phase-modulated, the total power is constant, but fractions
of the carrier power are constantly being shifted into the sidebands.
Regardless of the power used with or without modulation, quite satisfactory
communication is possible, over quite large distances. We still don't quite get
the point, the assumption, or the misunderstanding that the question seems
to imply.
What else can I help you with?
In what stage modulation is done on high power amplitude modulation transmission?
In high power AM transmission, modulation is done at
What do you think is a carrier's maximum modulation index without over-modulation?
The maximum modulation index for a carrier signal without resulting in over-modulation typically depends on the modulation scheme being used. For standard amplitude modulation (AM), the maximum modulation index is generally 1, meaning the peak envelope power of the modulated signal should not exceed the carrier power. In frequency modulation (FM), the modulation index can be higher, but it should still be kept within limits defined by the system to avoid distortion. Ultimately, the precise value can vary based on specific application requirements and the desired quality of the transmitted signal.
AM power content of the carrier is maximum when modulation index is?
The AM power content of the carrier is maximum when the modulation index is zero. At this point, there is no modulation applied to the carrier signal, meaning the entire power is concentrated in the carrier frequency itself. As the modulation index increases, the power is distributed between the carrier and the sidebands, resulting in a decrease in the carrier's power content. Thus, maximum carrier power occurs at zero modulation.
How does DSB SC modulation reduce power?
DSB SC (Double Sideband Suppressed Carrier) modulation reduces power consumption by eliminating the carrier wave from the transmitted signal, which typically requires a significant portion of the total power. In this method, only the sidebands, which contain the actual information, are transmitted, leading to more efficient use of power. This results in a lower average power requirement for signal transmission, making DSB SC modulation particularly advantageous for power-sensitive applications.
Why is AM modulation not an efficient way of modulation?
-- The power output stage in the transmitter must be operated either class A or class B. Whereas in FM the power output stage in the transmitter can operate class C which uses much less power per watt delivered to the antenna. -- For full modulation, audio power is required equal to 1/2 of the RF power of the transmitter output stage. -- At full modulation, 2/3 of the total power arriving at the receiver is at the carrier frequency, which conveys none of the information. -- A receiver designed for AM reception is susceptible to a wide variety of natural and man-made noise.
What is the digital pulse modulation?
There are 3 main types of digital pulse modulation:Pulse time modulation (PTM), somewhat similar to analog phase modulation.Pulse width modulation (PWM), the width of the pulse represents the signal.Pulse code modulation (PCM), serial transmission of binary bits forming numeric or character codes that represent the signal.All of these can be modulated on an RF carrier using any of the standard modulation techniques: AM, FM, Phase Modulation, etc. One advantage with AM digital pulse modulation techniques over AM analog is that the carrier can be 100% modulated, which cannot be done with analog, thereby allowing significant reductions in transmitter power without loss of coverage range. Sometimes FM digital pulse modulation techniques are referred to as Frequency Shift Keying (FSK). A very complex method of combining Phase Modulation and AM to increase the bit density of digital pulse modulation on an RF carrier is called Quadrature Amplitude Modulation (QAM).
What is the Digital modulation?
There are 3 main types of digital pulse modulation:Pulse time modulation (PTM), somewhat similar to analog phase modulation.Pulse width modulation (PWM), the width of the pulse represents the signal.Pulse code modulation (PCM), serial transmission of binary bits forming numeric or character codes that represent the signal.All of these can be modulated on an RF carrier using any of the standard modulation techniques: AM, FM, Phase Modulation, etc. One advantage with AM digital pulse modulation techniques over AM analog is that the carrier can be 100% modulated, which cannot be done with analog, thereby allowing significant reductions in transmitter power without loss of coverage range. Sometimes FM digital pulse modulation techniques are referred to as Frequency Shift Keying (FSK). A very complex method of combining Phase Modulation and AM to increase the bit density of digital pulse modulation on an RF carrier is called Quadrature Amplitude Modulation (QAM).
In electrical power transmission the line must have reactance to flow of the power without the reactance the power cannot flow please answer for this if required give mathematical expression thanx?
Electrical transmission lines do have reactance, but it is not necessary for power to flow. In fact, the smaller the reactance, the higher the efficiency of the transmission system. Reactive power is not delivered to the load, it does no useful work, it just costs money to generate and causes heating of the conductors.
How transmitted power is related to modulation index in am?
In amplitude modulation (AM), the modulation index (m) represents the ratio of the peak amplitude of the modulating signal to the peak amplitude of the carrier signal. The transmitted power in an AM signal increases with the modulation index, as higher modulation indices lead to greater variations in the carrier's amplitude. Specifically, the total transmitted power can be expressed as a function of the carrier power and the modulation index, with more power being allocated to sidebands as m increases. However, beyond a certain point, further increasing the modulation index can lead to distortion, as the signal may exceed the linear range of the amplifier.
Why amplitude modulation is called as collector modulation?
amplitude modulation using collector modulator gives:More symmetrical envelope• Higher power efficiency• Higher output power• Need higher amplitude modulatingsignal
What are the advantages frequency modulation amplitude modulation?
Frequency modulation have some advantages over amplitude modulation, FM is not sensitive to the amplitude noise, and have high efficient use of transmitted power
Which analog modulation scheme requires minimum transmitted power and minimum channel bandwidth?
ssb modulation scheme
