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What are the Advantages of digital transmission over analog?
Hi,1) Digital signals do not get corrupted by noise etc. You are sending a series of numbers that represent the signal of interest (i.e. audio, video etc.)2) Digital signals typically use less bandwidth. This is just another way to say you can cram more information (audio, video) into the same space.3) Digital can be encrypted so that only the intended receiver can decode it (like pay per view video, secure telephone etc.)There are others, but this is three of the biggies.Hi!Following are the Advantages of Digital Transmission over analog transmission.1. The signal is exact. For example, Digital formats like PCM (Pulse Code Modulation) can hold the exact digital format of sounds.2. Digital signals can checked for errors. Generally, all digital transmission methods use 'head labels' to provide better checking facilities. Head label may contain how many packets may need to complete the transmission, what is the sequence number of each packet of data, acknowledgment labels etc.3. A variety of services can afford over one line. For example, IpTV connection can used to watch cable TV channels while browsing the Internet through a PC using same line. This line can also used to make a phone call at the same time.4. Digital data can be compressed and therefore possible to pass over higher bandwidths. Any digital data; data, image, video, voice can be compressed.5. More secure. Digital data can be encrypt using an encryption method. Only the dedicated receiver can decode the message.6. Supports data integrity. Simple to integrate voice, video and data. Digital transmission provides easier way to integrate different digital formats.7. Digital transmission provides higher maximum transmission rates via medium such as optical fibers. Typically, digital transmissions use less bandwidth.Hope this will help you!(H.W Thushara Indika from Bandarawela - Sri Lanka)
What was The first medium to use digital communication?
The first digital media in the world was the digital watch. This item gained strongly on the market in those years and is still used by many. Casio is probably the most famous company that produces digital watches.
Why digital multimeter fails to read low resistance values?
They read low resistance values very well. I measured several dead shorts today accurately with a digital voltmeter. However, when attempting to measure LARGE amount of resistance, the current generator in a standard digital voltmeter may fail to effectively penetrate the medium being measured. It is for this reason that Meggers (Mega-Ohmmeters) are used to measure high amounts of resistance. They usually employ a hand crank to develop the current needed to effectively flow through the medium being measured. Sometimes digital voltmeters can be very inaccurate if they are measuring something that matches the impedance of the meter (loading effects of the voltmeter), but that is another story.
What is charging current in transmission lines?
Any two conductors separated by an insulating medium constitutes a condenser or capacitor.In case of overhead transmission lines, two conductors form the two plates of the capacitor and the air between the conductors behaves as dielectric medium. Thus an overhead transmission line can be assumed to have capacitance between the conductors throughout the length of the line. The capacitance is uniformly distributed over the length of the line and may be considered as uniform series of condensers connected between the conductors.When an alternating voltage is applied across the transmission line it draws the leading current even when supplying no load. This leading current will be in quadrature with the applied voltage and is termed as charging current. It must be noted that charging current is due to the capacitive effect between the conductors of the line and does not depend on the load. The strength of the charging currents depends on the voltage of transmission, the capacitance of the line and frequency of the ac supply. It is given by the expressionSignificance of Charging currents:Capacitance effect (responsible for charging currents) of the short transmission lines are negligible. However they are significant in medium and long distance transmission lines.In long distance transmission lines, during light loaded conditions receiving end voltage will be higher than sending end voltage. This is because of the charging currents and capacitive effect of the line
Is an electronic engineer the same as an electrical engineer?
It depends on country, school/education, etc. In some contexts, the two terms are synonyms. In others they have different meanings. In general:Electrical Engineers deal mostly with big machines, motors, power lines and power transmission, where the electricity is used to convey large amounts of energy.Electronics engineers prefer to be among low-power diodes, circuit boards, electronic chips, etc., where the electricity is used to convey analog or digital information.Though both Electronics and Electrical Engineers can do the same job in industry they are not same.Firstly their education is different as an Electronics Engineer will have more of Electronics papers and lesser Electrical Papers than the Electrical Engineer.Secondly there is a stark difference between Electrical and Electronics that needs to be addressed. Electrical science normally deals with current in medium that readily allow current to flow through them (conductors).On the other hand Electronics is a branch of science that deals with current in a medium that is reluctant to let current through them or only allow current through them under certain circumstances (semiconductors).
What is transmission in the context of science waves?
Transmission in the context of science waves refers to the process of waves passing through a medium, such as air or water, without being absorbed or reflected. This allows the wave to continue propagating through the medium.
Define transmission medium?
the substance that energy is transfered through. For example when you hear a sound the transmission medium is air.
Is medium required to transmit light waves?
No. light waves required no medium for transmission.
What is transmission in science terms?
In science, transmission refers to the process by which a signal, energy, or a substance passes through a medium or object without being absorbed or reflected. It is commonly used to describe the passage of light, sound, electricity, or other forms of energy through a material or medium.
What typeof waves may travel without a medium?
Electromagnetic waves, such as light and radio waves, can travel through a vacuum without a medium because they consist of oscillating electric and magnetic fields. These waves are able to propagate through space due to their unique nature and do not require a material medium for transmission.
What can travel through space without a(n) medium?
Electromagnetic waves can travel through space without a medium.
Mechanical waves require a medium for transmission?
Yes, mechanical waves require a medium, such as a solid, liquid, or gas, for transmission. This is because the energy of a mechanical wave is carried through the oscillations of particles in the medium. Without a medium, such as in a vacuum, mechanical waves cannot propagate.
Whats light transmission?
Light transmission is the ability of light to travel through a medium without being scattered or absorbed. When the light reaches a surface of material, this can absorb the entire portions of the light.
What can transfer energy without a medium?
Electromagnetic waves, however, in fact the medium for the transmission of electromagnet waves is space, so there really is a medium.
How does a packet travel across the Internet from A to B?
through transmission medium
Transmission of energy through space or any medium is called?
radiation
Which wave requires a medium for transmission light radio infrared or sound?
Sound waves require a medium, such as air, water, or solids, for transmission. Light, radio, and infrared waves can travel through a vacuum and do not require a medium for transmission.
