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.
The electromagnetic spectrum is composed of visible and Near infrared light like that transmitted by fiber, and all other wavelengths used to transmit signals such as AM and FM radio and television. The electromagnetic spectrum. Only a very small part of it is perceived by the human eye as light. 2. Discuss the wavelength, frequency, and energy of this type of wave.
It has been replaced with classless addressing where a netmask can be assigned to any IP address range. Class A IP Address Class A IP addresses were used for networks that had a large number of hosts on the network. The class permitted up to 126 networks by using the first octet of the address for the network identification. The first bit in this octet was always fixed or set to be zero. The following seven bits in the octet were then set to one which would complete the network identification.
Measuring the position Radio signals and codes Each GPS satellite transmits two radio signals, L1 (1575.42 MHz) and L2 (1227.60 MHz). The L1 signal is modulated with two pseudo-random noise (PRN) ranging codes, P-code and C/A code. The Precision or P-code can be encrypted for military use. The Coarse/Acquisition or C/A code is not encrypted. The L2 signal is modulated with the P-code only.
To identify where wireless devices such as APs should be placed in the network you should do what kind of test? Site Survey What does the WiFi Alliance do? Promotes Wi-Fi technology and certifies Wi-Fi products if they conform to certain standards. A company installs an 802.11g AP to rive its employee's wireless access from their cubicles. Carl's cubicle is 40 feet from the AP, Paul's is 20 feet, and Mark's is 100 feet.
(Choose two answers.) a,c 4. A PC NIC and a switch port create one electrical circuit to use when sending data from the PC to the switch. The transmitter uses a simple encoding scheme that uses a higher amplitude to encode 1 and a lower amplitude to encode 0, sending 1 bit in each bit time. The bit rate is 2000 bits per second (2000 bps).
It was designed to provide 3,000Hz bandwidth, perfectly adequate for a voice signal. Copper has a maximum distance of 90 meters if you exceed the 90m meter limit you will start getting attenuation problems which means you will start losing signal strengths. Fiber optic cable has many more advantages than copper cabling. It is much more secure and has complete immunity to electromagnetic interference. With this type of cabling there are
This IC is a great little part, and contains a lot of circuitry that helps us get on the air with minimal fuss, and great sound. This IC not only contains a stereo multiplexer, but also a phase locked loop (PLL), audio filters, and equalization capabilities. The audio filter portion adds a little more low-pass filtering to increase audio quality beyond what the external low pass filter can accomplish. The equalization portion enhances the high frequencies for the radio standard of 75uS in the US. 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.
First, the wave, like all sound, is a longitudinal pressure wave. In a longitudinal wave, movement of the points in the wave is parallel to the direction the wave travels. It is the kind of motion if it pushed and pulled one end of a stretched Slinky. Most illustrations, though, depict sound as a transverse wave, which is what would see if it rapidly moved one end of the Slinky up and down. This is simply because transverse waves are easier to visualize than longitudinal waves.
Antenna Project DongGee Rho Dr. Seung Kim Advanced Electromagnetic Field and Waves November 01, 2014 Contents Definition 3 Principles 3 2.1 Modulation & Demodulation 4 2.2 Beams of Antenna 5 2.3 Reciprocity of Antenna 5 2.4 Principles of wireless communication 5 3. Terminology 6 3.1 Radiation Pattern (Beam Pattern) 6 3.1.1 Antenna Gaine 8 3.2 Resonance 9 3.2.1 Bandwidth 9 3.3 Antenna Impedance 9 3.3.1 Impedance matching 10 3.3.2 VSWR 10 3.4 Antenna Efficiency 10 3.5 Polarization 10 3.6 Frequency Bands 11 4. Models of Antenna 12 4.1 Wire Antennas 12 4.1.1 Dipole Antenna 12 4.1.2 Monopole Antenna 13 4.1.3 Folded Dipole Antenna 14 4.2 Travelling Wave Antennas 14 4.2.1 Yagi-Uda Antenna 14 4.2.2 Helical Antenna 14 4.3 Parabolic Antenna 15 4.4 Patch Antenna 15 5. Design of Yagi-Uda Antenna 16 5.1 Transmitter 16 5.2 Receiver 17 5.3 Designing Antenna 18 5.3.1 Parameters of Yagi-Uda Antenna 19 5.3.2 Theoretical Demonstration 21 5.4 Construction of Antenna System 22 5.5 Experiment & Result 23 References 24 Using Components 25 1. Definition The origin of the word ‘Antenna’ is feelers of insects.