Click to enlarge
Home » Unmanned System Products » MASS-18 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)
MASS-15 Continuous Echo Simulation Excitation System of Radio Altimeter
Back to products
MASS-21 Echo Simulator of Radio Altimeter

MASS-18 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

The MASS-18 Universal Echo Precision Delay Module, characterized by its miniature design and universal continuous simulation capability, is a high-precision component engineered for precise echo signal delay adjustment in radio frequency (RF) testing scenarios. It specializes in delivering accurate, customizable delay for echo signals across a broad frequency range, making it compatible with diverse RF devices—including radio altimeters, surveillance radars, and communication systems—that require reliable echo signal simulation. Its compact form factor allows easy integration into space-constrained test setups, while the universal continuous simulation function ensures consistent replication of real-world signal delay conditions (such as those caused by varying altitudes or distances). By enabling precise control over echo delay, the module plays a critical role in verifying key performance metrics of target devices, such as signal capture accuracy, delay response, and data processing reliability, thereby supporting the development, calibration, and quality assurance of high-performance RF equipment with flexibility and precision.​
Categories: , , , ,
Description

Product Description

  • Working center frequency: 4.3GHz, 4.2GHz optional;
  • Maximum allowable bandwidth: 250MHz (- 3dB bandwidth);
  • It has straight separation function;
  • Maximum allowable input power: 26dBm;
  • Simulation height range: continuous: 0.4-15000m;
  • 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℃.
  • Volume and weight: the standard size of chassis is 233×160×52mm, no more than 2.5kg;
  • The working power supply is DC23～32V, and the power consumption is not more than 20W.

Related products

6U Module Radio Altimeter MY-919

The MY-919 radio altimeter is a new-generation altitude-measuring radar system designed for a specific type of aircraft; as a miniaturized, full-function radio altimeter that complies with avionics standards, it serves as a key component for the control of an aircraft’s longitudinal altitude channel and can be widely applied in large aircraft and unmanned aerial vehicles (UAVs). A radio altimeter based on a frequency-modulated continuous wave (FM CW) closed-loop tracking servo control measurement system, the MY-919 adopts linear modulation coefficients adaptive to altitude changes and narrow-band reception of echo signals, granting the product strong resistance to active interference; it uses coherent mixing reception, which delivers superior performance in resisting co-frequency asynchronous interference and ensures the product has good electromagnetic compatibility; it employs echo signal spectrum front detection technology, enabling the product to maintain high precision in tracking and measurement; it follows serialization, standardization, and modularization design principles, resulting in good product inheritance; and it integrates digital frequency-domain processing and control, microwave integration technology, and hybrid integration technology, making the product stable in performance, mature, and reliable.

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.

MDG-400 Radio Altimeter

The MDG-400 radio altimeter operates in the C-band and adopts a frequency-modulated continuous wave (FMCW) working system, with its antenna utilizing a transmit-receive separation mode. Prior to missile launch, the altimeter (serving as the height-fixing device) is powered on, and it undergoes self-check and height presetting via the communication interface. After the missile is launched, the radio frequency (RF) module is activated, and frequency variation parameters are set based on the preset height. When the preset height is achieved, the altimeter outputs height-fixing command information and telemetry data. The MDG-400 altimeter features mature technology; its adoption of frequency-modulated continuous wave (FMCW) technology endows it with the advantages of compact size and a large height measurement range.

Subminiature Radio Altimeter MY-70B

The MY-70B radio altimeter is a solid-state C-band radio altimeter system based on frequency-modulated continuous wave (FMCW) technology, characterized by 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 constant beat frequency, the measured altitude is proportional to the modulation period; thus, altitude information can be obtained by measuring the modulation period, and the system then converts this information into an altitude voltage for output. The MY-70B altimeter possesses excellent anti-jamming performance, owing 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. In terms of component design, its high-frequency components implement microwave integration while its low-frequency components adopt a modular design—these measures collectively enhance the product’s reliability, anti-interference capability, and electromagnetic compatibility. Additionally, the MY-70B altimeter uses RS422 and CAN protocols for its interface output, which further improves the reliability of the product’s data transmission.

Small Radio Altimeter MY-1000

The MY-1000 altimeter is a radar altimeter specially designed for a specific type of target missile aircraft; as a compact, full-function radio altimeter that complies with aerospace standards, it serves as a key component for longitudinal altitude channel control and can be widely used in cruise missiles and UAVs to measure height relative to sea level or the ground. The MY-1000 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 three design principles of serialization, standardization, and modularization—endowing it with good product inheritance, maturity, and reliability.

Electronic Countermeasure Radio Altimeter MY-18A、19A

Developed to meet the requirements of electronic countermeasures and terminal penetration, the MY-18A and MY-19A electronic countermeasure radio altimeters incorporate a range of advanced technologies including frequency agility, radiated power control, beam control, anti-burnout, anti-blocking, and echo frequency-domain processing—endowing them with excellent anti-jamming performance. Meanwhile, these altimeters also integrate a sea state identification function, which leverages information such as echo spectrum broadening, Doppler frequency, and altitude under different sea conditions to achieve accurate sea state recognition.

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.