Multi Rolle Radio is a modular radio set which supports high speed frequency hopping and strong encryption

Encryption

In cryptography, encryption is the process of transforming information using an algorithm to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. The result of the process is encrypted information...

. It was ordered in early 1993 and first put to operative use in mid-1995.

It operates on standard military VHF frequencies ranging from 30,000 to 87,975 MHz.

The system was developed in Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

, mainly by Kongsberg Defence Communication

Kongsberg Defence & Aerospace

Kongsberg Defence & Aerospace , one of two operating companies of Kongsberg Gruppen of Norway, is a supplier of defence and space related systems and products, mainly anti-ship missiles, military communications, and command and weapons control systems for naval vessels and air-defence applications...

 and Thales Group

Thales Group

The Thales Group is a French electronics company delivering information systems and services for the aerospace, defense, transportation and security markets...

 Norway, with support from the Norwegian Defence Research Establishment

Norwegian Defence Research Establishment

The Norwegian Defence Research Establishment is a research institute that conducts research and development on behalf of the Norwegian Armed Forces and provides expert advice to political and military defence leaders...

. 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

Relay

A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal , or where several circuits must be controlled...

.

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

FM broadcasting

FM broadcasting is a broadcasting technology pioneered by Edwin Howard Armstrong which uses frequency modulation to provide high-fidelity sound over broadcast radio. The term "FM band" describes the "frequency band in which FM is used for broadcasting"...

 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

TADKOM / TAktisk Digital KOMunikasjon 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 2mbit and above. TADKOM is also used to carry signals such as Link-11, Link-11B, Link-16 and Link-22...

 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.

Technical Characteristics
Data	Portable	Vehicle
Frequency Range:	30.00 to 79.95 MHz	30.00 to 79.95 MHz
Planning Range:	classified	classified
Power Output:	10 mW to 5 W	10 mW to 50 W
Power Source:	BB-500N rechargeable NiCd BB-5500N single use Li-SO2 BB-2500N rechargeable	24 VDC
Antenna:	AS-3010N flexible tape AS-3012N multisection	AS-3030N roof mounted 3,3m AS-102 mast mounted
Weight:	Approximately 10 kg	Approximately 20 kg