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Digital mobile radio (DMR) is a digital radio standard for voice and data transmission in non-public radio networks.It was created by the European Telecommunications Standards Institute (ETSI), [1] and is designed to be low-cost and easy to use.
The VOR allows the receiver to measure its bearing to or from the beacon, while the DME provides the slant distance between the receiver and the station. Together, the two measurements allow the receiver to compute a position fix. [2] The VOR system was first introduced in the 1930s, but did not enter significant commercial use until the early ...
DMR is an initialism that may refer to: Biology ... Dwarf mistletoe rating system, a scale for rating the severity of a dwarf mistletoe infection; Government
A Device Master Record (DMR) is a compilation of all the instructions, drawings and other records that must be used to produce a product. The term is used in Quality Management Systems that cover product design and production.
A Discharge Monitoring Report (DMR) is a United States regulatory term for a periodic water pollution report prepared by industries, municipalities and other facilities discharging to surface waters. [ 1 ] : 8–14 The facilities collect wastewater samples, conduct chemical and/or biological tests of the samples, and submit reports to a state ...
Informally, EVM is a measure of how far the points are from the ideal locations. Noise, distortion, spurious signals, and phase noise all degrade EVM, and therefore EVM provides a comprehensive measure of the quality of the radio receiver or transmitter for use in digital communications.
PMR systems are based on such standards as MPT-1327, TETRA, APCO 25, and DMR which are designed for dedicated use by specific organizations, or standards such as NXDN intended for general commercial use. These systems are used by police, fire, ambulance, and emergency services, and by commercial firms such as taxis and delivery services.
In reliability engineering, dual modular redundancy (DMR) is when components of a system are duplicated, providing redundancy in case one should fail. It is particularly applied to systems where the duplicated components work in parallel, particularly in fault-tolerant computer systems. A typical example is a complex computer system which has ...