Aircraft Radar Transponder

ITEM 380

NSN in the process of being assigned

ТУ У 26.5-33.2-22362867-052:2019

The Item 380 is a modification of the aircraft transponder of the general military radar identification system “Password”, which is designed to operate in the identification lines “ground-aircraft”, “aircraft-aircraft”, “ship-aircraft”.

The Item has high shock and vibration resistance and is adapted to work in harsh operating environment.

The Item 380 is a compact aircraft radar transponder of the general military state identification system “Password”, operating in the VII or VII and IIa wave bands, depending on the modification.

Features

The Item, depending on the modification, consists of one or two receiving and transmitting units, a computing unit, operational and auxiliary control panels, the encoder-decoder, communication lines and antennas
The Item 380 can be manufactured in a number of modifications:
- Item modifications 380.1, 380.1A (single-set). Designed for placement on small-sized aircraft and helicopters of civil and military aviation, operates in VII w.b. ensuring a directional response mode, i.e. issuing a response signal to the antenna from which the request signal with a larger amplitude was received
- Item modifications 380.21, 380.22, 380.21A, 380.22A (single-set). Designed for use on light small-sized aircraft and helicopters of civil and military aviation, operates in the VII w.b. The response signal is output simultaneously to both antennas using an output signal power divider in a 1:1 ratio (modifications 380.21A, 380.21B) or 1:2 ratio (modifications 380.22A, 380.22B)
- Item modifications 380.31, 380.31А, 380.32, 380.32А (two-set). Designed for use on large aircraft and helicopters of civil and military aviation, operates in the VII w.b. with an option of directional response. To obtain maximum response signal power, both transceiver units can be placed as close as possible to the corresponding antennas (separate placement option) or as a mono-rack
- Item modifications 380.41, 380.42 (two-set). Designed for use on military fighter aircraft, operates in transmission mode in the VII w.b. and in reception mode in the VII and IIa w.b. with an option of directional response. Ensures rapid shutdown of non-simulation-resistant identification modes in combat conditions

Application

The Item 380 receives and processes request signals, encodes and emits response signals. As a component of the identification system, the Item 380 performs the following tasks:
- Mode І − general unencrypted identification under the “friend-or-foe” principle
- Mode ІІ − general encrypted simulation-resistant identification under the “friend-or-foe” principle (if additional decrypting equipment is available)
- Mode ІІІ − individual identification under the “where are you?” principle
- Mode ІV − individual identification under the “who are you?” principle (aircraft ID transmission)
- Mode ІVВ − individual identification of naval helicopters
- Mode VІ – issuance of flight information (altitude, remaining fuel)
- Aiming mode − issuance of special information from fighter-interceptors operating in the target aiming system
- “Alarm”, “Disaster” mode − issuing signals about the emergency state of the aircraft
- An option to disable Mode II in the absence of the encoder-decoder
- An option of rapid disabling non-simulation-resistant modes in combat conditions

Main specifications

The frequency values of the request and response signals, the structure of the request signals and response codes are provided by the design of the Item 380 and correspond to those adopted in the “Password” identification system
The Item 380 works in conjunction with air traffic control equipment of CO-69 (CO-96), A-511 type
The energy parameters of the Item 380 for all destabilizing factors are given in Table 1

Delivery kit

compact Aircraft Radar Transponder (Item 380)
operating Manual
logbook
installation kit
packaging

Specifications

Table 1: Energy parameters of the Item 380

Pulse power at the outputs of the receiving-transmitting unit of the item of 380.1 modification

minimum 600 W not maximum 1 350 W

Total pulse power at the two outputs of the receiving-transmitting unit of the Item of 380.2 modification (with a power ratio between the outputs of 1:1 or 2:1), not less

900 W

Pulse power at the output of the receiving-transmitting unit of the two-set modification of the Item 380.3, 380.4 W

minimum 600
maximum 1 600

Sensitivity of receiving devices (upon triggering of transmitting devices) in all modes from the inputs of the receiving-transmitting units, minus dB/W

minimum 100
maximum 114

Minimum gain (G) of the antenna in the horizontal plane, taking into account the object impact

0.5

Minimum G of the antenna, taking into account the object impact and the angle relative to:

vertical-longitudinal plane

0.5 / ±30°

vertical-transverse plane

0.5 / ±30°

The Item 380 is equipped with an automated transponder built-in test system (TBT system), with the issuance of the test result to the on-board recorder and a light indication of failure, which allows searching for a faulty unit (sub-unit).

There is no emission of test signals during operation of the TBT system.

The warranty period of storage the Item 380 in the manufacturer’s packaging is 5 years from its manufacture date.

The warranty period of operation (warranty hours) of the Item 380 is calculated from the moment it is put into operation within the warranty storage period and is stated in the product passport.

Dimensions of the Item 380:

380.1, 380.2, 380.42

336 × 313 × 145 mm, weight - no more than 14.5 kg

380.3, 380.41

336 × 280 × 205 mm, weight - no more than 20.5 kg