Designated with an RG (radio grade) prefix such as RG-6, cables are also rated for signal loss (attenuation in dBs per 100 feet). Following are common types; however, there are many more in use. See RCA connector and F connector.
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Attenuation values for cabling media are expressed in units of decibels per 1000 feet, which express the amount of attenuation in decibels for a standard 1000-foot length of cabling composed of that media.
http://www.thenetworkencyclopedia.com/entry/attenuation/
attenuation. The loss of signal strength with long distances when signals travel along cabling. Attenuation values for actual cables are measured in units of decibels (dB) a standard measurement value used in communication for expressing the ratio of two values of voltage, power, or some other signal-related quantity.
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Part of the Data transmission glossary: Reprinted with permission from the e-book, Network Cabling HelpBelow are of some of the terms used in high performance cable testing, and a description of what they mean. ACR The first thing to understand about testing data cables is the ACR. This stands for attenuation to crosstalk ratio.
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Definition of:coaxial cable. A strong, flexible, high-capacity cable widely used in audio, video and data applications. Commonly called coax (pronounced  co-axe), the cable comprises a solid or stranded wire in the center, surrounded by insulation. The insulation is wrapped with a metallic foil or braided wire that serves as the ground line and interference shield.
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Coaxial Adapter: A device used to change one connector type to another or one gender to another (ex. BNC to SMA Adapter). Coaxial Cable: A two conductor cylindrical transmission line typically comprised of a center conductor, an insulating dielectric material and an outer conductor (shielding).
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The inner and outer coaxial diameter ratios and the dielectric constant in the cable define the parameters involved in determining characteristic impedance. Insertion Loss: A measurement of attenuation determined by the system output before and after the connection of a cable and/or device.
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Attenuation is caused by signal absorption, connector loss, and coupling loss. To minimize attenuation, use high-grade cabling such as enhanced category 5 cabling.
http://www.thenetworkencyclopedia.com/entry/attenuation/
Due to the twists in the cable, the measured length will be greater than the physical length, so if a run looks like it might be over 80m it would be wise to check it before it is tied up and terminated. attenuation This is the decrease in signal strength (expressed as negative dB) from one end of a cable to the other.
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Shielding Effectiveness is the relative ability of a shield to screen out undesirable interference. In the case of a coaxial cable, the outer conductor provides a shield to keep interfering signals from getting in and to keep signal from leaking out to become undesirable interference for nearby devices. Shielding Effectiveness is measured in dB with higher values indicating better shielding properties.
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cable attenuation definition
The cable attenuation is defined as loss of signal strength with long distances when signals travel along cabling. Cable attenuation is the loss of signal strength with long distances when signals travel along cabling.