Community antenna television

This paper discusses the latest advances in manufacturing Community Antenna Television (CATV) cables via the gas injection process. Developments in polymer technology are discussed which have led to the production, by gas injection, of highly expanded, ultra low dielectric loss PE cable insulation for CATV and data transmission 3 refs. 

In 1948, John and Margaret Walson, who sold televisions and other appliances in the mountains of Pennsylvania, used cables to connect a mountain antenna to their shop and some customers homes, creating the first community antenna television, or cable television, as it is now called. 

The electro-optic phenomenon, as the name implies, involves the interaction of electrical (DC-200 GHz frequency) and optical (2-4 X lO Hz frequency) fields within a material characterized by large hyperpolarizability (molecular second-order optical nonlinearity). Applications of this phenomenon focus on either the transduction of electrical signals into optical signals (e.g., as in the transduction of television signals onto fiber optic transmissions as in the community antenna television (CATV) industry) or the switching of an optical signal (e.g., as effected in local nodes of a local area network, LAN) between different transmission lines. 

Interactive video, video conferencing, or educational video typically requires two fibers. Broadcast or community antenna television (CATV) video is rapidly changing from the traditional one-fiber, source broadcast to receiver station interaction and, thus, utilizes two fibers. As this last form of video communication services expands, existing and future video systems will require at least two fibers. 

Used in the furtherance of repairing, maintaining, or operating any structures or any other physical facilities necessary for the delivery of pubhc utility services, including the furnishing of electric, gas, water, sanitaiy sewer, telephone, and television cable or community antenna service ... 

Wavelength and Antennae. Wireless communications transmit data using sinusoidal waves. The different types of waves can be characterized by their amplitude (the height of half a sine wave), their frequency, how many complete sine waves are in a fixed length, and their phase (the beginning zero point of a sine wave). A popular measure of wireless waves is their hertz (Hz), the number of cycles per second of the wireless wave. For example, radio and television... 

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