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 This list contains Acronyms and definitions related to Land Mobile Radio, 911, Boradband. 



700 MHz764-776 and 794-806 MHz
800 MHz794-815 and 839-860 MHz
AmplificationThe process of increasing the strength of a radio signal.
ARMERAllied Radio Matrix for Emergency Response.  The Minnesota statewide radio system.
BackboneStatewide ARMER public safety  radio communication system that consists of a shared infrastructure, the elements of which are identified in the State Public Safety Radio Communications Plan
Backward CompatibilityAbility of new units to operate within an "old" system infrastructure or to directly intercommunicate with an "old" unit. [8]
Band Pass FilterA filter that allows a certain range of frequencies to pass but which will reject frequencies below and above the desired range.
Band PlanA plan to allocate different frequencies within a range for specific purposes and users.
BandpassThe frequency range that a receiver is currently tuning or that a filter permits to pass through it.
BandwidthThe difference between the limiting frequencies of a continuous frequency band. Typically measured in kilohertz. May be considered the amount in kilohertz required for a single communications channel.
Call SignA group of letters and numbers used to identify a station and the country authorizing its operation.
Calling FrequencyAn agreed-upon frequency where stations attempt to contact each other; once contact is made, stations move to a working frequency.
CarrierThe unmodulated output of a radio transmitter.
Car-to-carTo communicate with another station without using a repeater. To transmit and receive on the same frequency. Also referred to as direct or simplex.
CEBCentral Electronics Bank
ChannelThe frequency on which a radio transmission takes place, or the input and output frequency pair used by a repeater station.
Channel IntegratorA fairly new and sophisticated, process/device or system which takes several inbound radio signals from a variety of bands and electronically interconnects them on the "outbound side" to one or more other otherwise incompatible radio channels. Examples: J
Co-channel InterferenceInterference from stations on frequencies adjacent to the desired signal.
Console  PatchButtons or icons in the dispatcher's radio console that (when properly selected) permit the ability to "patch" or connect two dissimilar regular radio channels or "trunked radio talkgroup" together for a specific conversation. (Example: Patching the VHF F
Control PointThe physical location from which a radio station's functions (setting frequency, turning the station off and on, etc.) are controlled.
CPSCustomer programming software
Cross Band RepeaterA single device which receives inbound radio traffic on one channel in one band (say MINSEF on VHF @ 155.475 MHz) and rebroadcasts it out on another channel in another band (say NPSPAC InterOp Channel 1 at 866.0125 MHz) and vice-versa
CSISCross Spectrum Interoperability System --  A Minnesota-based interoperability concept (see Standard 3.16.3)
Dead ZoneA region where a radio signal cannot be received due to propagation difficulties.
DecibelThe ratio between two power levels on a logarithmic scale. A 3 decibel increase is a doubling of power; a 20 decibel increase is a power increase of 100 times.
Digital & AnalogThe methods of modulating a radio signal as it travels through the air. Example: Digital signals are the speaker's words turned into a series of 1's and 0's, which are then transmitted through the air, received at the other end and then reconstituted back
DirectTo communicate with another station without using a repeater. To transmit and receive on the same frequency. Also referred to as simplex; or car to car.
DIUDigital interface unit
DTMFDual tone multiple frequency
DuplexTo transmit on one frequency while listening for replies on another.
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