Description

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　　TRX32 303088G Alternative Names:

TRX32 Filter Board (TRX32 303088G)

TRX32 303088G High-Performance Transceiver

High-Performance Filter Module (TRX32 303088G)

The TRX32 303088G is a rack-mounted plug-in card used in the Kongsberg HiPAP series of Ultra-Short Baseline (USBL) underwater acoustic positioning systems. It is an integrated PCB combining multi-channel acoustic transceivers, signal filtering, and system I/O interfaces—commonly referred to as the “TRX32 filter board.” It manages bidirectional acoustic signal conversion between the host computer and the hull-mounted transducer array, suppresses noise, and handles signal interaction with other ship control systems.

Transmission Principle: Digitally encoded commands from the HiPAP master control computer are sent to the TRX32 module via the onboard Ethernet interface. An internal DSP unit modulates these digital commands into acoustic pulse signals within the corresponding frequency band; a power amplification circuit then drives the transducer array to transmit underwater acoustic interrogation signals. The board features built-in passive and active filtering circuits to eliminate harmonics and switching power supply noise, ensuring a clean transmitted acoustic pulse waveform and preventing interference with other onboard acoustic equipment. Additionally, channel-specific configuration of pulse width, amplitude, and encoding sequences is supported.

Reception Principle: Weak echo signals returned by underwater transponders are captured by the hull-mounted transducer array and fed into the TRX32. The signal first enters the front-end analog filtering network, which filters out ambient ocean noise, mechanical vibration noise from the vessel’s hull, and out-of-band interference from other sonar equipment, while performing impedance matching and pre-amplification. Subsequently, the analog echo signal is sampled and converted into a digital signal, which is then passed to the onboard DSP for further digital filtering, signal demodulation, echo peak detection, and time-delay extraction. The module packages processed data—such as echo time delay and signal strength—and transmits it back to the HiPAP master control unit to calculate the range and bearing of the underwater target.

I/O Interface Principles: The module integrates dedicated I/O channels to facilitate the exchange of discrete (on/off) signals and synchronization signals between the acoustic positioning system and the vessel’s Dynamic Positioning (DP) system, winch control system, and ROV controller. It supports external trigger clock inputs, enabling synchronized acoustic signal transmission and acquisition across multiple boards and channels. The board features built-in status monitoring circuitry that collects data on power supply, channel faults, and connection status, reporting this information to the system via I/O and Ethernet; front-panel LEDs provide real-time indications of power, link, and channel activity. A high-capacity onboard capacitor bank serves as a short-term backup power source to handle momentary power outages on the vessel, ensuring that a single acoustic transmit-receive cycle is not interrupted.

Kongsberg TRX32 (303088G) Applications

This module is designed exclusively for use with Kongsberg HiPAP 101/351/451/501 high-precision underwater acoustic USBL (Ultra-Short Baseline) positioning systems. Installed within the HiPAP cabinet on surface vessels or offshore platforms, it serves as a core circuit board in the underwater acoustic positioning hardware chain.

ROV Underwater Tracking and Positioning: Supports real-time position calculation for working ROVs, providing high-precision positional data for ROV navigation, underwater pipeline inspection, and subsea equipment installation; positional information is output from the module’s I/O to the ROV control system.

AUV Underwater Tracking: Performs long-range acoustic tracking of Autonomous Underwater Vehicles (AUVs) to obtain their underwater coordinates, supporting underwater exploration and seabed mapping missions. Offshore Oil & Gas Engineering: Used for the relative positioning of subsea structures—such as seabed wellheads, subsea trees, and pipelines—to assist in offshore pipelaying and subsea maintenance operations; positioning data is fed into the platform’s Dynamic Positioning (DP) system to enable coordinated control of the vessel’s position relative to subsea targets.

Marine Scientific Research and Subsea Engineering Surveying: Acoustic tracking of underwater towed bodies and seabed observation equipment, as well as subsea target positioning to support seabed topographic mapping.

Integrated Vessel and Platform Dynamic Positioning: Real-time transmission of subsea target coordinates to the vessel’s K-Pos DP system via module I/O interfaces, enabling floating production platforms, pipelay vessels, and crane vessels to maintain a stable position relative to subsea facilities.

The module features a ruggedized marine design—resistant to salt spray, vibration, and electromagnetic interference—to meet the demands of harsh offshore environments; it supports the parallel connection of multiple TRX32 boards to expand channel capacity, enhance transducer array beamforming capabilities, and further improve positioning accuracy.

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