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Multi Rolle Radio (English: Multi Role Radio) is a modular radio set which supports high speed
frequency hopping Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many distinct frequencies occupying a large spectral band. The changes are controlled by a code known to both tra ...
and strong
encryption In cryptography, encryption is the process of encoding information. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Ideally, only authorized parties can dec ...
. It was ordered in early 1993 and first put to operative use in mid-1995. It operates on standard military
VHF Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VH ...
frequencies ranging from 30.000 to 87.975 MHz. The system was developed in
Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...
, mainly by Kongsberg Defence Communication and
Thales Group Thales Group () is a French multinational company that designs, develops and manufactures electrical systems as well as devices and equipment for the aerospace, defence, transportation and security sectors. The company is headquartered in Paris ...
Norway, with support from the
Norwegian Defence Research Establishment The Norwegian Defence Research Establishment (''Forsvarets forskningsinstitutt'' – ''FFI'') is a research institute that conducts research and development on behalf of the Norwegian Armed Forces and provides expert advice to political and mi ...
. It has been exported to Hungary. The radio is modular, and can be configured both as portable (PRC) and vehicle-mounted (VRC). The VRC can be fitted with two receive/transmit modules in a single mounting, for use as a
relay A relay Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off A relay is an electrically operated swit ...
. Although most transmit specifications are classified, it is known that the radio uses Gaussian Minimum Shift Keying and M-ary encoding. It can also be used in an analog FM mode, in which it is compatible with other radios like AN/PRC-77 and civilian radios. It has several features besides being a traditional radio set, amongst them message relaying of digital messages, cell area mobile capabilities and Digital
Tadkom TADKOM / TAktisk Digital KOMunikasjon (English: TADCOM / TActical Digital COMmunication) is an encrypted network used as a carrier for most of the communication for all four branches of the Norwegian military. Most nodes operate on a speed of 2m ...
access. The lighter, more mobile set for the Norwegian military is Lett Feltradio (Light multi role radio). This is fully interoperable with MRR both in plain and encrypted mode. Military radio systems Norwegian Defence Research Establishment {{tech-stub