Modernization of early-warning VHF radar 5N84A (5N84, 44Zh6 or P-14) offers the best (in terms of efficiency/cost ratio) alternative to restoration or repair of legacy prototypes.
  As a result of modernization the radar’s detection performance is efficiently improved. Modernized radar features automatic tracking capability as well as data receiving from other radar sensors. Data can be exchanged over a variety of communication channels.


  Radar’s equipment cabin has been fully modernized. Metric band is preserved, however the number of working frequencies has been sufficiently increased from 4 to 200, the capability of instantaneous electronic frequency agility has been added as well. The radar transmitter and receiver feature solid-state components only. Transmitter has a modular design which provides ‘soft-failure’ redundancy: failure of individual module leads to partial performance degradation.
Antenna-mast assembly is equipped with the new asynchronous motor drives controlled by frequency inverters.
  Modernized 5N84AMA radar remains a two-dimensional system and it is used to find azimuth and range.
Altitude can be obtained by interfacing modernized height-finding radars. Parameters of the transmitted signal as well as parameters of the signal processing after reception can be set at the operator workstation, while secondary processing and tracking are performed at remote workstation. Both workstations are installed in the equipment cabin.
  As an option, ground interrogator can be controlled in auto- and semiautomatic modes with assigning aircraft state identification status. All air situation is automatically recorded with playback capability in passive and interactive modes.
  Modernized 5N84AMA radar features efficient protection against pulse interference and active jamming. Level of interference is continuously monitored and graphically represented to operator. Jamming protection is achieved through expansion of the dynamic range of the signal processor and capability of electronic frequency agility. Passive interference is rejected through digital adaptive MTI and generation of clutter map.
  Equipment of 5N84AMA can be installed on a semitrailer or in two standard sea containers mounted stationary or on a vehicle.



Range of working frequencies, MHz 170-190 160-200
Frequency agility:
  method for frequency agility; electromechanical electronic
  discreet steps; 4 fixed frequencies 200 kHz
  frequency setting accuracy. n/a ±10 kHz
Types of transmitted probing pulses:
  short pulse; 10 µs 10 µs
phase shift keyed signals:
  13-bit 13 10 µs
  28-88 bit (28 – 88) 10 µs
Transmitter pulse power 700 kW 30 kW
Capability of instant probing signal power
and structure changes
Not implemented Implemented
Detection range for a target with RCS of 2.5m2, Р=0.5:
  min range - 2,7 km
  at altitude of Н=100 m 30 km 37 km
  at altitude of Н=500 m 85 km 105 km
  at altitude of Н=1000 m 110 km 130 km
  at altitude of Н=3000 m 185 km 220 km
  at altitude of Н=10000 m 290 km 340 km
Detection accuracy:
  range 1000 m 270 m
  azimuth 0.80 0.40
  range 3500 m 1600 m
  azimuth 80 80
Range of adaptive MTI - 0-500 km
Clutter suppression ratio - > 40 dB
Dynamic range of receiver and digital signal processor - > 100 dB
Automatic control of modernized height-finders - Implemented
Number of controlled height-finders - up to 4
Start-up time 8 min 3 min
Power consumption 60 kW up to 40 kW