Block 1P / IZH2.022.006-02

Block 1P receiver-exciter for R-863 radio station

Block 1P / IZH2.022.006-02 is a receiver-exciter unit used as part of the R-863 onboard command VHF/UHF aircraft radio station. It may also be associated with R-862 radio station configurations where applicable by documentation. The unit is one of the main functional blocks of the radio station and participates in reception, frequency generation and preparation of the radio-frequency signal for transmission through the transmitter section.

Function of Block 1P in the R-863 system

Within the R-863 radio station, Block 1P performs receiver and exciter functions. In receive mode, it processes incoming radio signals from the selected operating channel and supports demodulation of received communication signals. In transmit mode, the block works as an exciter, generating the required high-frequency signal for further amplification by the transmitter / power amplifier section. The unit is therefore directly connected with both the receiving and transmitting paths of the radio station.

Frequency formation and operating ranges

Block 1P supports operation of the R-863 radio station in the VHF and UHF ranges. The unit is involved in forming the operating frequency grid used by the radio station. According to the R-863 system data, the radio station operates in the 100.000–149.975 MHz VHF range and 220.000–399.975 MHz UHF range with 25 kHz channel spacing. The total number of fixed communication channels is divided between the VHF and UHF ranges according to the radio station configuration.

Internal structure of Block 1P

The unit is built as a complex modular chassis containing functional subassemblies for frequency reference, frequency control, receiver high-frequency circuits, exciter functions, intermediate-frequency amplification and low-frequency amplification. Depending on modification, the unit may also include an emergency receiver subassembly for standby reception on emergency frequencies. Exact internal subblock configuration should be confirmed by the technical description, repair documentation and the specific unit passport.

Installation of Block 1P on aircraft and helicopters

The R-863 radio station is remotely controlled, so the receiver-exciter and other radio blocks are installed separately from the cockpit control panel. Block 1P is installed inside the main radio equipment assembly or transceiver structure and is mounted on the aircraft radio equipment rack or shock-mounted frame according to aircraft documentation. Typical application may include Mi-8, Mi-17, Mi-24 and other Mi-family helicopters, as well as transport and military aircraft equipped with compatible R-863 / R-862 command radio stations.

Identification and ordering of Block 1P

The product may be referenced as Block 1P, Блок 1П, IZH2.022.006-02, ИЖ2.022.006-02 or ЯДИЖ2.022.006-02. These designations refer to the receiver-exciter unit used in the R-863 radio station system. For correct supply, it is useful to specify the required radio station version, aircraft type, unit modification, connector configuration, condition, documentation requirements and whether the block is required as a standalone spare part or as part of a complete R-863 radio station set.

Product Type: Receiver-exciter unit
Designation: Block 1P / IZH2.022.006-02
Alternative Designations: Блок 1П, ИЖ2.022.006-02, ЯДИЖ2.022.006-02, R-863 receiver-exciter
Function: Reception, demodulation, frequency generation and excitation of transmitter signal
Purpose: Main receiver-exciter unit for R-863 / R-862 command radio station systems
Application / Where Used: Aircraft and helicopter command radio communication systems
Associated Systems: R-863, R-862 command radio stations
System Role: Main functional unit of the receiving and exciter paths
System / Installation Area: Onboard command radio communication system
Installation Location: Aircraft radio equipment compartment / radio equipment rack according to aircraft documentation
Typical Helicopter Application: Mi-8, Mi-17, Mi-24 and related Mi-family helicopters where applicable by documentation
Typical Aircraft Application: An-26, Il-76, Su-25, Su-27 and other aircraft equipped with compatible R-863 / R-862 systems where applicable
Controlled Frequency Range, VHF: 100.000–149.975 MHz
Controlled Frequency Range, UHF: 220.000–399.975 MHz
Channel Spacing: 25 kHz
Number of Channels, VHF: 2000
Number of Channels, UHF: 7200
Modulation Types: AM, FM and frequency telegraphy
Receiver Sensitivity: Not worse than 3 µV in AM and FM modes, according to supplied data
Channel Switching Time: Not more than 1.5 s, according to radio station system data
Power Supply: 27 V DC aircraft power system
Operating Mode, Receive: Receiver path active; transmitter exciter circuits not used for transmission
Operating Mode, Transmit: Exciter generates signal for transmitter; IF and emergency receiver circuits may be disabled according to operating logic
Internal Subassemblies: Reference frequency unit; frequency control and synthesizer units; RF receiver unit; exciter and generator modules; IF amplifier; LF amplifier; emergency receiver subassembly where applicable
Emergency Receiver Versions: 1-6 for 121.5 MHz or 1-6A for 243 MHz, where applicable by modification
Installation Method: Mounted inside the radio station / transceiver structure with front locking screws and rear multi-contact connectors
Overall Transceiver Assembly Dimensions: About 460 × 170 × 270 mm for receiver-exciter, transmitter and amplifier assembly, according to supplied data
Overall Transceiver Assembly Weight: About 18–22 kg, according to supplied data
Condition: As applicable
Technical Documentation: Manufacturer passport, technical description, wiring documentation and operating documentation upon request

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.