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What method of signal transmission uses radio waves to carry signals?
Wiki User
∙ 9y ago
The analog method of signal transmission uses radio waves to carry signals. Digital transmission involves the use of satellites to transmit signals.
Wiki User
∙ 9y ago
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What is Analog carrier system used in telephony?
Analog Carrier System is a transmission system that uses repeaters that compensate for analog medium impairments, and produce output signals that are linear-scaled versions of input signals. Analog carrier systems can carry speech, data, video and supervisory signals although they are best suited for speech signals.
What is the purpose and advantages of shielded cable?
Shielded cable is commonly used for routing of audio, video, and rf signals. The grounded shield surrounds one or more inner conductors that carry the often low level signals and prevents spurrious external electromagnetic events from inducing an unwanted additional signal into the center conductor(s). Idealy, the signal cables should all be commonly grounded only at one location. Otherwise, a condition known as ground loop can occur which can actually degrade the signal and possibly even damage connected devices. In some cases where even more noise protection is needed, a two wire plus shield method known as balanced wire is used. The signal is applied across the two center conductors and at the recieving end applied to a balanced transformer with its center tap connected to ground and the shield. Therefore, any induced noise will (presumably) be equal in both signal conductors and will cancel itself at the transformer while the out of phase signal passes right through.
What is the purpose of line trap?
A line trap is a set of physically-large inductors often seen hanging from transmission towers at the end of a high-voltage transmission line, where the line terminates at a substation. As transmission lines often carry data signals, which operate at frequencies very much higher than the 50-Hz (or 60-Hz) power frequency, the high inductive reactance* of the line traps act to prevent these signals from continuing beyond the end of that section of transmission line, while having an insignificant effect on the power-frequency load current.(*Inductive reactance is directly proportional to frequency)
What is Transmission Line Frequency Response?
A specialized cable that is designed to carry alternating current of radio frequency is known as a transmission line frequency.The Transmission line frequency response in connecting radio transmitters and receivers with their antennas, distributing cable television signals,trunklines routing calls between telephone switching centers, computer network connections, and high speed computer data buses.
What is the purpose of a feedthrough?
A feedthrough is a conductor used to carry a signal through a circuit board. They have two main catagories which are power and instrumentation. Power feedthroughs are used to carry a high pwer or high voltage. Instrumentation are used to carry a low voltage electric signal.
Which method of signal transmission uses radio waves to carry signals?
Wireless
What is digital signal?
There are many forms of digital signals PWM, PAM, and more Basically is a signal that carry information to be extracted to its original form.
What type of neurone carry electrical signal to the brain?
Afferent neurons (also called sensory neurons) carry signals to the central nervous system and the brain. Efferent neurons (also called motor neurons) carry signals from the brain.
What nerves carry signals to and from the eyes and ears?
The oculomotor nerve or the third cranial nerve, trochlear or forth cranial nerve and abducent or the sixth cranial nerve carry signal to your eye. The optic nerve carry the signal from the eye to the brain. Vestibulocochlear or the eighth cranial nerve carry the signal from your ear to the brain.
What carries information in the form of electrical sighals?
Signal curcuits are used for many different purposes. Wires carry electrical signals.
Does an S Video cable also carry audio?
S-video is a two part video signal carrying luma and chroma signals (Brightness and color signals). There is no audio signal in an S-video connection so the audio will need a separate connection to operate.
What is signal bandwidth?
Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth. The signals ranging within the upper limit & lower limit are called bandwidth signals.
How do electromagnetic waves carry sound as electrical signals?
The electromagnetic wave is "modulated" (changed) to represent the signal. For example, in AM (amplitude modulation), the strength (amplitude) of the wave is increased or decreased, according to the signal.
What converts analogue signals to digital signals for transmission over telephone lines?
Actually you have this backwards, the telephone lines can only carry analogue signals (voice band, 20Hz to 3KHz) not digital signals.The device that converts digital signals to analogue signals for transmission over telephone lines is called a phone MoDem(this stands for phone modulator demodulator). At the opposite end of the line it of course converts the telephone analogue signals back to digital signals.
What is a signal transduction pathway?
A signal transduction pathway is a group of proteins that carry out transducing signals (which means it converts signals from outside the cell to a different signal inside the cell). A good example can be viewed when a hormone binds to the receptor in the plasma membrane (outside the cell), the receptor which has now been activated can now interact with intercellular proteins which produce new signals inside the cell.
How do waves carry signals?
Waves can be varied (modulated) by either changing amplitude (amplitude modulation AM) or changing frequency (wavelength) (frequency modulation FM). The modulations are used to carry the information signal.
What is coposite video signal?
A composite video signal is a color video signal carried on a single cable. Color video signals have three separate components plus synchronization signals. They would normally require three separate cables to carry a brightness signal (with synchronization signals) and two color signals. Composite signals combine the brightness (luminance) signal with the two color (chrominance) within a single signal. The color encoding follows certain standards - PAL in UK and most of EUrope, NTSC in North America. Composite signals were developed prior to color television broadcasting with the main aim of allowing black and white televisions to receive a color signal. The encoding technique was patented in 1938, almost a decade before commercial color broadcasts began. In the early days of color television broadcasts, most televisions were black and white and it was not practical to build a completely new transmission infra-structure for the limited number of color televisions. Since the 1950s color television has been broadcast in composite format and has not changed since. It is only in the 21st century that HD television is introducing a new signal format. Today, composite is considered to be the lowest quality available. S-video, component, RGB and HDMI all offer higher quality signals. Despite the alternatives, composite signals have remained in common use because the difference is quality is not great and they provide a simple convenient method to connect equipment.
