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R-181-5NU is a multimode radio with software defined radio (SDR) architecture which is designed to build up a radio subsystem for tactic control level as well as to exchange analog and digital information in all weather conditions. It provides for open and technically masked out radio channel in electromagnetic suppression conditions featuring increased noise immunity and security of operation (pseudorandom operational frequency readjustment, PROFR) with radio sets compatible in frequency range, modulation formats and operating modes.

Operating types:

  • analog voice reception and transmission with frequency and amplitude modulation;
  • digital voice reception and transmission;
  • data streaming and batch transmission with ARQ at rate from 9.6 to 19.2 kbps.

Operating modes:

  • single-frequency and double-frequency simplex;
  • voice information and data reception and transmission in pseudorandom operational frequency readjustment (PROFR) mode;
  • operation with a noise suppressor;
  • noiseless coding;
  • technical masking out;
  • automated radio data recording;
  • scan reception at 8 preset frequencies;
  • subscriber, group and circular type of the users’ addressing;
  • external PC control;
  • saving (standby) reception;
  • tone call transmission and reception.
General performance characteristics
Parameter Value
Operating frequency range, MHz: 30–512
Number of channels: 100
Frequency spectrum pitch, kHz: 12.5/25
Transmitter output power, W: 5–8
PROFR rate, jumps/s: min 200
Receiver sensitivity, µV: 0.35–0.5
Operating temperature range, °C: – 40…+ 55
Transceiver weight with a battery, kg NMT 6.5
Overall dimensions with a battery, mm: 230 х 340 х 90
Continuous operation time with battery, hours: min 8

  • connection to unified encryption protection module (guaranteed encryption);
  • external device remote control via USB 2.0, RS-232 interfaces;
  • transmitter power level flexible change;
  • emergency radio data cancellation;
  • built-in software health monitoring diagnostics;
  • detachable control panel;
  • display and keypad have variable brightness illumination;
  • automatic and manual keypad lock;
  • flexible and functional software aided parameter setting;
  • transceiver is made in sealed high impact aluminum alloy housing.
Completed units. Basic scope of delivery
  • Transceiver PP-U 
  • Control panel 
  • Helmet headset 
  • Handset
  • Battery unit
  • Antenna set
  • Cover for control panel
  • Backpack 
Optional accessory
  • Battery charger ZU1-R-181 
  • Solar array battery charger 
  • Battery charger – hand generator

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