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Home » Unmanned System Products » PXI Bus Type Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)
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M025A Receiver SD Integrated Receiver

PXI Bus Type Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

The PXI Radio Altimeter Simulator Module is a specialized signal simulation module that adheres to PXI bus technical specifications. Boasting key attributes including high accuracy, a wide attenuation range, simplified system configuration, and reliable stability with strong repeatability, it finds extensive application in factory testing for radio altimeter manufacturers, maintenance and inspection of altimeters, and on-site aircraft detection. As a critical module for verifying the performance and functionality of airborne radio altimeters, it serves as an indispensable foundational component for PXI bus-based automatic test systems of airborne avionics equipment.
It features communication capability with radio altimeter interfaces.
It is equipped with high-information simulation functionality.
It provides sensitivity detection for altimeters.
Categories: Atmospheric Treatment, Data Communication, Partsassembly, Radar Detection, Scene Simulation
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  • Description
Description

Main Technical Specifications

  • Working center frequency: 4.3GHz;
  • Maximum allowable bandwidth: 200MHz (- 3dB bandwidth);
  • It has straight separation function;
  • Maximum allowable input power: 26dBm;
  • Simulation height range: single point: 2m, 5m; Continuous: 20-2000m;
  • Simulation height resolution: 0.5m;
  • Simulation height accuracy: ±(0.2+0.002×H)m
  • Height change speed: -500~500m/s;
  • Height switching time: no more than 1ms (excluding communication and analysis time);
  • In band fluctuation: ±1dB;
  • Minimum attenuation of circuit: no more than 40dB;
  • Maximum attenuation of circuit: not less than 100dB;
  • Control mode: RS422 serial port control;
  • Working temperature: -40℃~+60℃;
  • Storage temperature: -55℃~70℃.

Related products

Radio Altimeter MY-3001D

The MY-3001D radio altimeter incorporates two key technologies: a linear modulation coefficient technology that adapts to altitude changes and a narrow-band receiving technology for echo signals, both of which effectively enhance the product’s resistance to active interference. It also adopts coherent local oscillator mixing, granting it superior performance in resisting co-frequency asynchronous interference, and employs echo signal spectrum front-edge detection technology to boost tracking accuracy. In terms of design, the altimeter follows the principles of serialization, standardization, and modularization. While retaining its closed-loop tracking system, it further integrates digital control technology, microwave integration technology, and hybrid integration technology to achieve product modularization. Additionally, it is equipped with a silent function, which further improves the product’s anti-interference capability. This radio altimeter is applicable to cruise missiles and unmanned aerial vehicles (UAVs) for measuring the altitude relative to the sea surface or the ground.

Full Function Radio Altimeter MMK-4

The MMK-4 altimeter is a full-function radio altimeter that meets aerospace standards; serving as a key component for longitudinal altitude channel control, it can be widely applied in cruise missiles and aircraft to measure altitude relative to the sea or ground. The MMK-4 adopts linear modulation coefficient technology adaptive to height changes and echo signal narrow-band receiving technology to enhance the product’s resistance to active interference, uses coherent local oscillator mixing to achieve superior performance in resisting co-frequency asynchronous interference, employs echo signal spectrum front detection technology to improve tracking accuracy, and follows the design principles of serialization, standardization, and modularization—endowing it with good product inheritance, maturity, and reliability.

MDG-200 Radio Altimeter

The MDG-200 radio height-setting device operates in the C-band and adopts a monopulse working system. Its sensitive component is of the heterodyne type, and the circulator at the antenna terminal uses a transceiver common-mode configuration. Prior to missile launch, the height-setting device needs to be powered on; it then performs a self-check and completes height setting via the communication interface. After the missile is launched, the radio frequency (RF) module is activated, and a gate is set based on the preconfigured height. When the preset height is reached, the device outputs height-setting command information and telemetry data. The MDG-200 height-setting device features mature technology: the monopulse design enhances the altimeter’s height measurement performance, and the device also has the characteristic of not being affected by the carrier’s speed.

MASS-21 Echo Simulator of Radio Altimeter

​The MASS-21 Radio Altimeter Echo Simulator is capable of simulating both static and dynamic echo signals of altimeters under a variety of altitude conditions and reflection coefficient scenarios. It is compatible with radio altimeters of multiple systems, including frequency modulation (FM) systems, phase modulation (PM) systems, and pulse systems, and is also equipped with a built-in self-check function to ensure its own operational reliability during use.

MDG-100 Radio Height Setting Device

The MDG-100 radio altimeter operates in the C-band and adopts a pulse Doppler working system. Its sensitive device is of the heterodyne type, and the circulator at the antenna terminal uses a transceiver common-mode design. With mature technology, this altimeter is installed on missiles and serves as a control component for altitude fuzes. It features capabilities such as high burst altitude, strong adaptability to high falling speeds, and excellent performance in resisting ground clutter and sea clutter. Additionally, it employs pseudo-random pulse modulation technology: the pulse period varies randomly within a specified range, making it difficult for jammers to identify the initial modulation pulse of the fuze signal and further predict the delayed pulse. This design effectively enhances the altimeter’s resistance to active interference.

Subminiature Radio Altimeter MY-70A

The MY-70A radio altimeter is a solid-state C-band radio altimeter system based on frequency-modulated continuous wave (FMCW) technology, featuring constant beat frequency and closed-loop tracking measurement. It maintains a constant beat frequency by servo-controlling the slope of the sawtooth wave that modulates the microwave oscillator, thereby achieving automatic altitude tracking. Under the condition of a constant beat frequency, the measured altitude is proportional to the modulation period; thus, altitude information can be acquired by measuring the modulation period, and the system then converts this information into an altitude voltage for output. The MY-70A altimeter boasts excellent anti-jamming performance, thanks to its adoption of a narrow-band receiver (with gain adjustable according to altitude), as well as technologies including equivalent spectrum front-end detection, weighted frequency identification, and automatic servo tracking. Additionally, the altimeter’s high-frequency components are implemented with microwave integration, while its low-frequency components utilize a modular design—these measures collectively enhance the product’s reliability, anti-interference capability, and electromagnetic compatibility.

MASS-10 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

The MASS-10 Universal Echo Precision Delay Module, featuring a miniature design and universal continuous simulation capability, is a high-performance component tailored for precise echo signal delay control in radio frequency (RF) testing scenarios. It excels in providing accurate, adjustable delay for echo signals across a wide range of frequencies, making it applicable to various devices like radio altimeters, radars, and other RF-based systems that require reliable echo signal simulation. With its compact size, the module is easy to integrate into limited-space test setups, while the universal continuous simulation function ensures it can replicate diverse real-world signal delay conditions consistently. This module plays a crucial role in verifying the performance of target devices—such as testing their ability to accurately capture and process delayed echo signals—thereby supporting the development, calibration, and quality assurance of RF equipment with high precision and flexibility.

MAST-09 Radio Altimeter Detection Unit

The MAST-09 Radio Altimeter Detection Unit is a compact, aerospace-grade component that monitors, validates, and processes radio altimeter data for aircraft. It filters interference, cross-references data with other flight sensors, and detects faults (e.g., signal loss, calibration drift) to deliver reliable terrain-relative altitude info—critical for safe takeoff, low-altitude flight, approach, and landing, even in low visibility. Built to meet strict aerospace standards (e.g., DO-160, DO-178), it withstands extreme environmental conditions, suiting commercial and military aircraft.

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