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What similarities between analog and digital signals?
ANALOG:continuous,rate of transmission is slow,less reliable 2 transmit,more noise,interference is more DIGITAL:non continuous,rate of transmission is fast,more reliable 2 transmit,less noise,interference is less
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 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 function of amplitude modulation?
Amplitude modulation (AM) is a method used in telecommunications to vary the strength (amplitude) of a carrier signal in proportion to the waveform being sent. This modulation technique allows the transmission of audio or data signals through changes in the amplitude of the carrier signal. AM is commonly used in broadcast radio to carry audio signals.
How does light carry data and what are the implications of this method of data transmission?
Light carries data through the use of optical fibers, which are thin strands of glass or plastic that transmit light signals. These signals can represent binary data in the form of on/off pulses of light. The implications of using light for data transmission include faster speeds, higher bandwidth, and lower susceptibility to electromagnetic interference compared to traditional copper wire communication. This method also allows for longer distance transmission without signal degradation, making it ideal for long-distance communication networks.
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 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 was originally developed to carry a large number of high-speed video transmissions at one time?
Multiplexing was originally developed to carry a large number of high-speed video transmissions at one time by combining multiple signals into a single signal for transmission over a shared medium.
What type of waves carry optical fibre signals?
Light waves carry optical fiber signals. These waves are typically in the infrared range and are able to travel long distances through the fiber without losing signal strength.
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 carries information in the form of electrical sighals?
Signal curcuits are used for many different purposes. Wires carry electrical signals.
What does an XLR cable do and how does it contribute to audio signal transmission?
An XLR cable is a type of cable used to transmit audio signals between devices like microphones and speakers. It has three pins that carry balanced audio signals, reducing interference and improving sound quality. The XLR cable's design helps maintain signal integrity over long distances, making it a reliable choice for professional audio applications.
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.
