EW, ELINT, AND COMMUNICATIONS SYSTEMS
SPN-2 Powerful Noise Jamming System
Mission The SPN-2 (1RL248-2) noise jamming system is designed to deny enemy reconnaissance and observation of area and smallsize ground objects by airborne side-looking radars, air-to-surface guided weapons control radars, as well as na vigation and low-altitude flight control radars. The SPN-2 system can suppress two sidelooking radars, or two low-altitude flight control radars, or up to six weapons control radars in two directio ns simulta n eousl y. Suppression can be carried out depending on the antenna beam width: within a 10x45-deg sector (narrow beam mode) or a 45x45-deg sector (wide beam mode).
Composition • antenna vehicle with antenna-fee der s yste m and associated equipment • com bat control vehicle fitted wit h communications, data transmission, testing and recording s ystems • electric power supply system including a 60 kW diesel generator and industrial electric converter Types of jam ming signals: • quasi-continuous noise/masking jam ming of either selective (6 to 19 MHz) or barrage (260 to 270 MHz) type; • repeater noise jamming, if the hostile radar being suppressed operates in the pulse-topulse freque nc y agility mode. All components of the SPN-2 jamming system are mounted on a self-propelled highmobility wheeled chassis, and are operated by a crew of five.
Operating frequency band, MHz Total power output, W Receiver sensitivity, dB/W Detection/suppression range, km: air-launched weapon control radars side-looking radars low-altitude flight control radars
13,333-17,544 1,100 -90
not less than 130-150 at least 60 (one radar) at least 40 (two radars) at least 50 (one radar) at least 30 (two radars)
Angular coverage limits, deg: azimuth elevation
0 - 360 -2.5…+45
Instant coverage sector, deg: Angular coordinates measurement accuracy, deg: in azimuth in elevation Number of beams in instant coverage sector Paraxial beam width, deg: in azimuth in elevation Repeater jamming signal delay (after receiving signal of the hostile frequency-hopping radar), microsec Max continuous operation time, hrs AC power supply, V: 400 Hz 50 Hz Power consumption, kW
45 10 24 7.5 2.5
not more than 15 24 220 380 50
75