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What will happen if frequency raises to 500Hz or lowered to 5Hz?
Sankarmohankumar
if we take the signal as voice of any people the changing in frecuncy mean the voice will change .. on other hand when we speek about low frecuncy that men we speek about DC when we speek about hi frecuny we speek about AC . the difrent in the rang of frecuny change the circuit analysis method .. ..
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∙ 12y ago
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How would you find a period of a wave if the wave frequency is 500Hz?
Period = 1/frequency = 1/500 = 0.002 second = 2 milliseconds
What is the bandwidth of a signal composed of frequencies from 50 Hz to 500 Hz?
The bandwidth of a signal is the width of frequencies between the highest and the lowest frequency. So 500Hz - 50Hz = 450Hz bandwidth. AE7HD
Calculate the wavelength of a 500Hz pure tone?
.69m/s
What happen if a transformer designed for 50 HZ and you operate it 500HZ?
If no other parameter will change then there will by only slight increase in core loss. However if frequency is increased 10 times transformer will be capable to accept 10 times higher voltage under same load conditions without saturating. This defectively increases transformer power capacity and cores loss will also increase in same degree.
Do you have to have 100 percent hearing to be a pilot?
You don't need 100% hearing. You must be able to clearly hear with both ears and your back turned towards the source, a regular conversational voice in a quiet room from a distance of 6ft.If your medical examiner decides to perform an audiometric speech discrimination test you must pass with scores better than:Your better ear at sound levels 500Hz, 1000Hz, 2000Hz, 3000Hz with 35dB, 30dB, 30dB, 40dB respectively.Your worst ear at sounds levels 500Hz, 1000Hz, 2000Hz, 3000Hz with 35dB, 50dB, 50dB, 60dB respectively.
How can IC 74190 will give output freq as 50Hz?
The 74190 is an up/down decade counter. Counters use frequency division to achieve a counting sequence. To answer your question, it depends on the input frequency. The Qa output will divide the clock input by 2 so if the input is 100Hz, Qa's output is 50Hz. Since this is a decade (0 to 9, or truncated sequence) counter and not a binary (0 to 15, or full sequence) counter, the outputs Qb, Qc and Qd divide the input but their outputs are not symmetrical (equal time high and time low). Qb and Qc produce 2 pulses for every 10 input pulses, therefore divide the input clock by 5. Qd produces one output pulse for every 10 input pulses, therefore divides the input by 10. The easiest way to visualize this is to write out the binary count in column format, starting at 0000 and ending at 1001, and looking at each of the output patterns. To produce the 50Hz output, assuming you are not concerned over symmetry: -input clock 100Hz for 50 Hz on Qa -input clock 250Hz for Qb or Qc output of 50Hz -input clock 500Hz for Qd output of 50Hz
What is concept of multiplexing in telephone system?
MultiplexingMultiplexing is a form of data transmission in which one communication channel carries several transmissions at the same time. The telephone lines that carry our daily conversations can carry thousands or even more of conversations at a time using multiplexing concept. The exact number of simultaneous transmission depends on the type of communication channel and the data transmission rate.Economics of scale play an important role in the telephone system. It costs essentially the same amount of money to install and maintain a high-bandwidth trunk as low-bandwidth trunk between two switching officers. Consequently, telephone companies have developed elaborate schemes for multiplexing many conversations over a single physical trunk.Accordingly, the communication channel is shared in such a way as to maximum the utilization of the channel capacity. Thus the method of dividing a single channel into many channels so that a number of independent signals may be transmitted on it is known as Multiplexing.Multiplexing schemes can be divided into two basic categories:Frequency Division Multiplexing FDMTime Division Multiplexing TDMFrequency division multiplexing ( FDM) is the technique used to divide the bandwidth available in a physical medium into a number of smaller independent logical channels with each channel having a small bandwidth. The method of using a number of carrier frequencies each of which is modulated by an independent speech signal is in fact frequency division multiplexing.The following figure depict how three voice-grade telephone channels are multiplexing using FDM. When many channels are multiplexed together, 400Hz is allocated to each channel to keep them well separated. First the voice channels are raised in frequency, each by a different amount. Then they can be combined, because no two channels how occupy the same portion of the spectrum. Notice that even though there are gaps(guard bands) between the channels, there is some overlap between adjacent channels, because the filters do not have sharp edges. This overlap means that a strong spike at the edge of one channel will be felt in the adjacent one as non-thermal noise.Frequency-division multiplexing works best with low-speed devices. The frequency division multiplexing schemes used around the world are to some degree standardized. A wide spread standard is 12 400-Hz each voice channels ( 300Hz for user, plus two guard bands of 500Hz each) multiplexed into the 60 to 108 KHz band. Many carriers offer a 48 to 56 kbps leased line service to customers, based on the group. Other standards upto 230000 voice channels also exist.Example:The allocated spectrum is about IMHz, roughly 500 to 1500 KHz. Different (stations, each operating in a portion of the spectrum. With the interchannel separation great enough to prevent interference. This system is an example of frequency division multiplexing.Advantages of FDMHere user can be added to the system by simply adding another pair of transmitter modulator and receiver domodulators.FDM system support full duplex information flow which is required by most of application.Noise problem for analog communication has lesser effect.Disadvantages of FDMIn FDM system, the initial cost is high. This may include the cable between the two ends and the associated connectors for the cable.In FDM system, a problem for one user can sometimes affect others.In FDM system, each user requires a precise carrier frequency.Time Division Multiplexing ( TDM) is another popular method of utilizing the capacity of a physical channel effectively. Each user of the channel is allotted a small time interval during which is may transmit a message. Thus the total time available in the channel is divided and each user is allocated a time slice. In TDM, user send message sequentially one after another. Each user can, however, use the full channel bandwidth during the period he has control over the channel. The channel capacity is fully utilized in TDM by interleaving a number of messages belonging to different users into one long message. This message sent through the physical channel must be separated at the receiving end. Individual chunks of message sent by each user should be reassembled into a full message as shownUnfortunately, TDM can only be used for digital data multiplexing. Since local loops produce analog signals, a conversion is needed from analog to digital in the end office. Where all the individual local loops come together to be combined onto outgoing trucks.Example:In some countries, the individual stations have two logical sub channels : music and advertising. These two alternate in time on the same frequency first a burst of music, then a burst of advertising, then more music and so on. This situation is time division multiplexing.Advantages of TDMIt uses a single linksIt does not require precise carrier matching at both end of the links.Use of capacity is high.Each to expand the number of users on a system at a low cost.There is no need to include identification of the traffic stream on each packet.Disadvantages of TDMThe sensitivity to other user problem is highInitial cost is highTechnical complexity is moreThe noise problem for analog communication has greater effect.
