Discuss the wavelength, frequency, and energy of this type of wave. For fiber optics with glass fibers, we use light in the infrared region which has wavelengths longer than visible light, typically around 850, 1300 and 1550 nm. Why do we use the infrared? Because the attenuation of the fiber is much less at those wavelengths. The attenuation of glass optical fiber is caused by two factors, absorption and scattering.
Fiber Optic cabling is the other type of cabling solution we talked about. Fiber optics uses a glass or plastic core to transmit light between each connection. Because we are using light instead of an electrical current, fiber is immune electromagnetic to interference. Fiber is also able to send data at faster speeds and longer distances than copper cabling. Fiber is harder to work with and usually needs a specialized technician to install the connections.
75uS is the time constant used for a high-pass filter to enhance the high frequency audio before transmission to help reduce noise upon reception. The PLL is the portion of the IC which locks your chosen transmission frequency to the crystal reference X1. The PLL portion also contains an oscillator circuit which works in conjunction with the external parts of D5 and the STUB (that weird trace on the back of the board). D5 is called a varactor diode, and is a special variety of diode that is connected backwards. As a reverse DC voltage is applied across the diode, its capacitance varies.
Which of the following is the most likely reason why EMI from one wire does not affect the electrical behavior of another wire inside the same cable? b 7. Which of the following facts are in common between both of the Ethernet standards discussed in this chapter, 10BASE-T and 100BASE-T? (Choose two answers.) a,b 8.
Definition The origin of the word ‘Antenna’ is feelers of insects. As feelers are used for detecting invisible signals, the antenna also has similar purpose and function. Antenna is an electrical device that converts the electric signal which is represented by voltage and current to the electromagnetic wave, or reversely converts the electromagnetic wave to the electric signal like figure 2. The electric signal is conveyed by the potential difference and the movement of electrons, so it can’t be delivered through free space. On the other hand, the electromagnetic wave can’t pass the conductor, but rather pass through non-conducted materials.
A numerical aperture (NA) mismatch occurs when the NA of one optical fiber is different from the NA of the other optical fiber. If the NA of the transmitting fiber is larger than the NA of the receiving optical fiber, a loss may occur. However, a loss will not occur if the NA of the transmitting optical fiber is less than the NA receiving optical fiber. NA mismatch loss is typically only a concern with multimode optical fiber. To avoid this mismatch make sure you are using the proper lengths of cable, accounting for the
Oliver Lodge successfully demonstrated, in an experiment, in 1887 radio transmission of an electromagnetic wave from one location to another (Laidler, 1998, p.186). Hertz, however, is credited with furthering Maxwell’s theory by creating a continuous electrical wave, using wire and brass knobs as a receiver and an oscillator, which created electromagnetic waves (Rubin, 2009). Similarly, Samuel Morse, demonstrated Joseph Henry’s theories of the electric telegraph in 1835 by creating signals of pulsing current that could be sent via wire (The Hutchinson Encyclopedia of Science , 2004 p. 3191). These technological milestones helped lead to the development of radio. Gregory Benford explains how, Marconi’s interest in developing the radio was sparked somewhat by accident, in his article Scientist Heroes: Fantasy & Science.
School of Engineering and Physical Sciences Electrical and Electronic Engineering Praxis Electronic Design B37VA Assignment 1 Ohm’s Law Name: Ruqayyah Merchant Student Id: Lecturer, Electrical and Electronic Engineering: Dr Mutasim Nour Ohm’s Law Abstract: The dynamism of Ohm’s Law for a simple resistor circuit is examined and verified. The equivalent current and equivalent voltage data across the circuit is accumulated and compared to the theoretical values calculated using Ohm’s Law equation. Eventually the deliberate results are presented in scatter plots. Introduction: A close logical examination of Ohm's experimental work reveals a conceptual structure quite different from that of the electrical science of his time. As a result of this analysis, it is claimed that the conceptual shift in Ohm's experimental work was the basis for the reaction of his contemporaries.
This is designed to keep all links active, enabling highly efficient, high bandwidth connectivity throughout the switching plane. The third major difference is in their prospective bandwidths. HP has high bandwidth connectivity due to IRF’s loop-free, non-blocking architecture. This is designed to keep all links active, enabling highly efficient, high bandwidth connectivity throughout the switching plane. 2.
This is designed to keep all links active, enabling highly efficient, high bandwidth connectivity throughout the switching plane. The third major difference is in their prospective bandwidths. HP has high bandwidth connectivity due to IRF’s loop-free, non-blocking architecture. This is designed to keep all links active, enabling highly efficient, high bandwidth connectivity throughout the switching plane. 2.