Description of the radar set, tactical-technical characteristics
|frequency:||150 - 170 MHz
|pulse repetition time (PRT):||2.77 milliseconds|
|pulse repetition frequency (PRF):||345 Hz ±10%|
|pulsewidth (τ):||6 µs|
|receiving time:||2.4 milliseconds|
|dead time:||377 µs|
|peak power:||160 to 250 kW|
|average power:||up to 540 watts|
|instrumented range:||200 NM|
|range resolution:||½ NM|
|hits per scan:||> 15|
|antenna rotation:||6 … 30 seconds|
(0 … 10 rpm.)
The P-12 (Russian designation: 1RL14, NATO designation: „Spoon Rest B“) is a rapidly deployable radar family in the VHF range. The basic version was included in the armament of the Soviet Army since 1958.
The different versions are:
- P-12M “Yenisei” (Cyrillic: «Енисей-М»), version on two “ZiL 157”;
- P-12MP “Sdvig-K” (“Displacement”, Cyrillic: «Сдвиг-К»; NATO designation: “Spoon Rest”);
- P-12MA “Sura” (name of a river in the Amur, Cyrillic: «Сура»; NATO designation: “Spoon Rest A”);
- P-12NP “Irtysh” (Cyrillic: «Иртыш»; NATO designation: “Spoon Rest B”), hanger version with coupling apparatus;
- P-12NA “Irtysh” (Cyrillic: «Иртыш»; NATO designation: “Spoon Rest C”), version with coupling apparatus on two Ural 375s with gasoline engines;
- P-12NM “Dessert” (Cyrillic: «Десерт»), version on two Ural-4320s with diesel engines.
The station could be synchronized with another radar using a coupling apparatus and display the echoes of both radars. The rotation of the P-12 was synchronized to the other radar via a multi-channel servo system. The transmitter then used the extraneous trigger pulse. The echo signals were fed directly into a second video channel in the display unit.
The P-12 had an effective jamming protection system with two potential storage tubes. The interference protection system could be configured differently in near range than in far range. The switching was done with a strobe-pulse, which was generated by a phantastron and could be controlled in the distance. The potential storage tubes were thus either connected in series for more effective suppression of clutter or they operated independently, one to select moving targets (SBZ) at close range, the second to suppress nonsynchronous interference pulses (UNS) over the entire range.