Transmissionmedia ccn

Editor's Notes

• #18: Crosstalk is a disturbance caused by the electric or magnetic fields of one telecommunication signal affecting a signal in an adjacent circuit. In an telephone circuit, crosstalk can result in your hearing part of a voice conversation from another circuit.
• #25: A baseband coaxial cable transmits a single signal at a time at very high speed. A broadband coaxial cable can transmit many simultaneous signals using different frequencies. A baseband cable is mainly used for LANs. 
• #30: Both types provide a maximum data transfer rate of 100Mbps. The advantages of using coax cabling can be found in the maximum data transmission range. Thinnet has a maximum data transmission range of 185m, while thicknet has a maximum data transmission range of 500m.
• #38: The angle of reflection of a ray or beam is the anglemeasured from the reflected ray to the surface normal. From the law of reflection, , where is theangle of incidence. is measured between the ray and a line normal to the surface that intersects the surface at the same point as the ray. Refraction of Light: as it passes from more dense to less dense mediums. The bending of light as it passes from one medium to another is called refraction. The angle and wavelength at which the light enters a substance and the density of that substance determine how much the light is refracted.
• #56: To receive DTV signals from all stations in the area, your antenna needs to be able to receive both VHF channels (channels 2-13) and UHF channels (channels 14-51). Some antennas only provide good reception of VHF or UHF channels, but not both. Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter. ... Lower frequency signals fall into the VHF (very high frequency) or lower bands. An omnidirectional antenna is a wireless transmitting or receiving antenna that radiates or intercepts radio-frequency (RF) electromagnetic fields equally well in all horizontal directions in a flat, two-dimensional (2D) geometric plane.  FM radio waves do not travel far beyond the visual horizon, so receptiondistances for FM stations are usually limited to 30—40 miles (48.3—64.4 km) They can also be blocked by hills. This is less than the range of AM radio waves, which because of their lower frequency can 
• #57: AM broadcasting is a radio broadcasting technology, which employs amplitude modulation (AM) transmissions. It was the first method developed for making audio radiotransmissions, and is still used worldwide, primarily for medium wave transmissions, but also on the AM broadcasting is a radio broadcasting technology, which employs amplitude modulation (AM) transmissions. It was the first method developed for making audio radiotransmissions, and is still used worldwide, primarily for medium wave transmissions, but also on th
• #59: A Unicast transmission/stream sends IP packets to a single recipient on a network. A Multicast transmission sends IP packets to a group of hosts on a network. ... Since Multicasting is a relatively new technology, some legacy devices that are part of your network might not support Multicasting.
• #60: This means that they stay in a fixed position over the Earth's surface. Geostationary satellites have uses such as: communications - including satellite TV. globalpositioning or GPS - which is used for sat navs (satellite navigation systems)