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What is the purpose of a VoIP gateway?
for a good purpose
What is special purpose machinery?
Special Purpose Machinery
What is the purpose of using monitoring systems?
The purpose of using monitoring systems is to capture data. Another purpose of using monitoring systems is to monitor the environment for security purpose.
What is general purpose resistor?
General purpose resistor is used to resist the current flow.the common resister is general purpose resister.
Are All technology is designed for a purpose?
Yeah! Everything has a purpose.
Why you are suppressing the 2 sidebands of dsbsc?
The sidebands are not suppressed in DSB-SC ... that's where the information is !.The carrier is suppressed, and only the sidebands are transmitted. The mainadvantage of doing that is the fact that the RF power that would otherwise beused for the carrier is then available for the sidebands. This swap typicallyresults in increased range of communication with the same amount of power.
How many sidebands does an FM signal generate?
2, 4, 6, 8, 10 it depends on the amount of modulation. 100%1 on each side, 200% 2 sidebands on each side.
What are three disadvantages of standard am?
1. In the spectrum of AM wave there are two sidebands and carrier. Most of the transmitted power is in the carrier. This power is wasted because the carrier contains no power, only the sidebands contain the information . 2. The standard AM systems utilize twice as much bandwidth as needed with single -sideband systems. 3. The sidebands and carrier must have precise amplitude and phase relationships. These relationships are difficult to maintain under some conditions.
A modulated waveform that contains a carrier plus two sidebands for each modulation frequency is a description of?
Both AM and narrow-band-FM.
Is modulated voice signal a baseband or broadband?
Neither.baseband refers to the original voice signal itselfbroadband refers to a form of wide bandwidth data transmission (e.g. internet traffic)the modulated voice signal consists of a carrier frequency and two sidebands, the bandwidth of the sidebands varies depending on the form of modulation used as well as the bandwidth of the original baseband signal, to reduce transmission power it is possible to eliminate the carrier frequency and to reduce overall bandwidth one of the sidebands may be partially suppressed or eliminated completely (but one sideband must always be fully retained)
What is the meaning of suppressed carrier in am?
radio an amplitude-modulated wave in which only the sidebands are transmitted, the carrier being removedhttp://dictionary.reference.com/browse/suppressed+carrier+modulation
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.
How does the frequency change in a FM transmitter?
-- the modulation index varies -- the instantaneous deviation varies -- the amplitude of the carrier component varies -- the spectrum of sidebands varies -- the total occupied bandwidth varies
How does double sideband differ from standard AM?
Standard AM already has double sideband. When you talk about double sideband, however, often the meaning is usually "double sideband, suppressed carrier". By suppressing the carrier, you can impute more power into the sidebands, because you are not providing power to the carrier, which accounts for a significant percentage of the total power. Since the sidebands actually contain the signal, you can boost the signal to noise ratio by suppressing the carrier. This comes at a cost, however, in complexity, because you need to regenerate the carrier in order to demodulate the signal. In fact, many systems use single sideband, suppressed carrier, doubling the available power to the sideband containing the signal over double sideband suppressed carrier. This works, again at the cost of receiver and transmitter complexity, because the two sidebands contain the same information.
What are the advantage and disadvantage of SSB sc modulating signal?
The advantages of DSB-SC are that power consumption is nominal, the power from the signal can be contained in four sidebands, and the bandwidth is double the amount in the signal.
What are the Applications of double side suppressed carrier modulation?
Each of the two sidebands can be modulated independently to give two simultaneous communication channels. There would be no point in radiating the carrier, as it carries no information, and would waste transmitter power.
What is the difference between am and dsb-sc?
In normal a.m. the sum of the power in the two sidebands can't exceed half the power of the carrier. For example, a 100W carrier when 100% modulated will have 25W in each sideband. Since both sidebands have identical information, one of them can be considered redundant. So we are transmitting 150W and making use of only 25W. In suppressed carrier d.s.b. we can achieve better efficiency since, with high suppression, we have 50% of the total power in each sideband. So a 150W transmitter, at 100% modulation, will radiate 75W in each sideband.
