The JTM-30C series NDB (Non-Directional Beacon) supports Zhuhua 30.

The Zhenhua 30 is a large-scale crane ship independently constructed by Zhenhua Heavy Industry. It weighs approximately 140,000 tons in total and has a maximum lifting capacity of 12,000 tons for a single boom. It was delivered for use at the Changxing Island base in Shanghai on May 13, 2016. This ship has the capabilities of self-navigation and DP2 dynamic positioning, and is equipped with 12 propellers. Its operational efficiency is superior to that of ordinary crane ships. Through lifting capacity tests, its actual lifting capacity can reach 13,200 tons. The helicopter platform is equipped with the JTM-30C system; as a new generation fully integrated NDB, the JTM-30C series adopts reliable digital technology, with its frequency synthesis completed by a direct digital synthesizer (DDS). This technology provides high linearity and stability of carrier and modulation, with low noise and excellent frequency accuracy. Compared to traditional analog equipment, it fundamentally improves the accuracy and stability of navigation signals, thereby providing more precise guidance for helicopters. 

The main advantages of the JTM-30C series NDB (Non-Directional Beacon) lie in its high reliability, advanced technology, strong environmental adaptability, and convenient maintenance. 

· Extremely high reliability and redundancy: A dual transmitter configuration is available, automatically switching over in the event of a primary failure to ensure uninterrupted signal transmission. It supports dual power inputs of 110/220VAC and 24VDC, with automatic switching to guarantee continuous operation in the event of power failure. 

· Advanced digital technology: Utilizing digital drivers and direct digital synthesizers, it ensures high frequency stability, low noise and excellent frequency accuracy. The frequency can be adjusted in 1Hz increments within the range of 190 kHz to 2 MHz, and it is compatible with different frequency allocations worldwide. 

· Comprehensive monitoring and remote management: It features automatic monitoring capabilities, enabling real-time monitoring of carrier, modulation and fault status. It can be remotely accessed via PC (RS-485) or a web page, allowing for programming and control of parameters such as frequency, power, and Morse code. 

· Robust environmental adaptability: The cabinet achieves IP66 protection level, providing protection against wind and rain and being sturdy and durable. Built-in heating elements are included to cope with low-temperature and high-humidity environments, with a wide operating temperature range of -35°C to +55°C. 

· Integration and Flexibility: Adopting an integrated design, it includes components such as power supply and antenna tuning unit, making installation cost-effective. It is equipped with non-volatile memory, supporting presetting multiple transmission modes and Morse code sequences.