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The dBm is also dimensionless, [1] [2] but since it compares to a fixed reference value, the dBm rating is an absolute one. The dBm is not a part of the International System of Units (SI) and therefore is discouraged from use in documents or systems that adhere to SI units.
A power level of 0 dBm corresponds to one milliwatt, and 1 dBm is one decibel greater (about 1.259 mW). In professional audio specifications, a popular unit is the dBu. This is relative to the root mean square voltage which delivers 1 mW (0 dBm) into a 600-ohm resistor, or √ 1 mW × 600 Ω ≈ 0.775 V RMS.
sdbm ("small dbm"), a public domain rewrite of dbm. It is a part of the standard distribution for Perl and is available as an external library for Ruby. [6] [7] qdbm ("Quick Database Manager"), a higher-performance dbm employing many of the same techniques as Tokyo/Kyoto Cabinet. Written by the same author before they moved on to the cabinets.
This is an alphabetical list of notable technology terms. It includes terms with notable applications in computing, networking, and other technological fields. Contents
High Definition Television, any television system with more than 625 scan lines. headphone An audio transducer or pair of transducers arranged to be worn on (or in) the ear. heat transfer The study of the flow of heat energy; heat transfer concerns dictate major design features of most electrical and electronic systems. heatsink
The abbreviation dBm0 stands for the power in dBm measured at a zero transmission level point. The TLP is thus characterized by the relation: [1] TLP = dBm — dBm0. The term TLP is commonly used as if it were a unit, [2] preceded by the nominal level for the test point. For example, the expression 0 TLP refers to a 0 dBm TLP. If for instance a ...
The term represented a contrast with the tape-based systems of the past, allowing shared interactive use rather than daily batch processing. The Oxford English Dictionary cites a 1962 report by the System Development Corporation of California as the first to use the term "data-base" in a specific technical sense. [10]
When the power is expressed in dBm the larger the absolute value of the negative number, the better the receive sensitivity. For example, a receiver sensitivity of −98 dBm is better than a receive sensitivity of −95 dBm by 3 dB, or a factor of two. In other words, at a specified data rate, a receiver with a −98 dBm sensitivity can hear ...