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In what stage modulation is done on high power amplitude modulation transmission?
In high power AM transmission, modulation is done at
How can measure the gain of an antenna?
ratio of transmitted power and received power
IF transmitted power is increased by 16 than range is increased by a?
R is proportional to 1/4th power of transmitted power so answer is 2
What are the drawbacks of using amplitude modulation?
1)Lower frequencies, shorter range, smaller bandwidth. 2)More power required because, in amplitude modulation we are transmitting 3 frequencies i.e, carrier, lower side band and higher side band. the carrier have no any information but it required 2/3rd power. 3)The two side bands have same information so there is no need of transmitting the two side bands.
What are the advantages and disadvantages of double sideband suppressed carrier modulation?
Amplitude modulation of a carrier results in a transmitted signal consisting of the carrier, plus an 'upper sideband' and a 'lower sideband', spaced above and below the carrier frequency by the frequency of the modulation.The bandwidth of the whole signal is double the modulation frequency. Also, the power in the carrier is constant, and power must be added in order to radiate the sidebands.All the receiver needs in order to extract the information from the signal is one complete sideband, and knowledge of the frequency and phase of the carrier. Economically speaking, the carrier is wasted power, and the other sideband is wasted power andwasted spectrum.If you can filter away one of the sidebands before transmission, then you save half of the occupied spectrum, and the receiver has everything it needs to decode the signal. If you can also filter away the carrier ... or at least knock it way down ... before transmission, you can save a lot of power and use it for the remaining sideband, which extends your range for a given amount of power. The receiver still has everything it needs, as long as it can pick up a sniff of carrier ... enough to derive the carrier frequency and phase.This mode is known as "Single Sideband Suppressed Carrier". It's exactly how the video portion of standard NTSC analog TV was transmitted, throughout all of human history until June 2009.
What transmmited power when modulation index 0 to 1?
It can be anything at all, from yoctowatts to terawatts. You must state the power output at some modulation index before I can calculate it for some other modulation index. By the way . . . the answer also depends on the method of modulation, which you have not mentioned. For example, with pure FM, the transmitted power doesn't change, regardless of the mod-index.
Which analog modulation scheme requires minimum transmitted power and minimum channel bandwidth?
ssb modulation scheme
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
What is percentage power saving if AM transmitter with modulation index m equals 0.5 is replaced by SSBSC transmitter with same modulation index?
Pt=Pc+2Psf, m=0.5 ,Psf=0.0625, saving in power is 100-6.25 % = 94.75%
How output power vary with modulation index of am signal?
P'=P(1+m^2/2)
The total power content of an AM signal is 1000W Determine the power being transmitted at the carrier frequency and at each of the sidebands when the percent modulation is 100 percent?
In Double Sideband AM (DSB-AM) modulation, two thirds of the power is consumed by the carrier, so 667W would be transmitted at the carrier frequency. The remaining 333W is split equally between the two sidebands, each being mirror images of each other.
In what stage modulation is done on high power amplitude modulation transmission?
In high power AM transmission, modulation is done at
Why is it desirable to have the modulation index of an AM signal as large as possible without overmodulating?
It uses the maximum power available to the transmitter and makes the signal more readable at a greater distance.
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
Why negative modulation is used in tv?
Negative modulation means for maximum luminance zero carrier power is transmitted. This helped in reducing impulsive noise which produced spots on screen and also synchronizing pulse has maximum carrier power so its is relatively easy for AGC (Automatic Gain Control) to pick it up and provide constant voltage output to drive rest of the TV circuits.
In what stage modulation is done in high power AM transmissions?
RF Power stage
What is high level AM modulation?
High level AM modulation is a type of modulation using class c (90 percent) amplifiers. The system uses medium power tubes or transistors and is bulky.
