Functional Advantages

GNSS satellite receivers allow users to freely define priority levels.

Function: Customers can freely switch and prioritize time sources according to their needs, such as selecting BeiDou as the primary source with GPS as a secondary option, among other flexible settings. Principle: Utilizing an algorithm independently developed by Zhongxin Chuang, combined with advanced GNSS satellite receivers, each receiver can be configured individually or in combination to operate in different timing modes, supporting single‑receiver/dual‑receiver and single‑antenna/dual‑antenna configurations. Other companies: Offer only GPS‑plus‑BeiDou module receivers. By default, these receivers prioritize GPS and resort to BeiDou satellites only when GPS signals are weak. If only BeiDou satellites are permitted, GPS must be disabled entirely. Such systems cannot prioritize BeiDou over GPS or allow free switching between the two, thereby limiting usability.

Independently developed core software algorithms

1. Premium hardware, employing “all-digital phase-locked loop” technology to ensure precise time synchronization and stable lock.

2. The satellite receiver locks onto the 1-PPS second pulse from the satellite signal.

3. After being subjected to conditioning: a precise yet unstable satellite frequency, which is then fed to timing devices such as oven‑controlled crystal oscillators for stabilization.

4. The frequency of the constant‑temperature crystal oscillator is inaccurate but stable. In this case, we must employ digital phase‑locked loop technology to process the signal and obtain an accurate, stable output, thereby ensuring reliable performance in timekeeping and time synchronization.

Optimized hardware paired with core algorithms

Market‑grade professional time‑synchronization receivers: Next‑generation devices offering stable signal performance at a higher cost. These are not obsolete legacy models. Tuning chip: Highly capable, with robust resolution and high cost. Tuning technology: “Digital Phase‑Locked Loop (dPLL) technology,” developed in‑house by Zhongxin Chuang. Superior to the widely used “analog Phase‑Locked Loop (aPLL) technology,” delivering far greater precision in frequency‑locking. This breakthrough has surpassed the industry’s requirements for time synchronization and now meets the even more stringent accuracy standards of the frequency‑synchronization sector.

Single-star timing technology

Function: As long as the receiver’s position remains unchanged, accurate time synchronization can be achieved using just a single satellite. Principle: Unlike other manufacturers’ solutions that require at least four satellites for continuous timing, this product—once properly initialized and after acquiring precise time from four or more satellites—can maintain accurate timekeeping even when only one satellite is in view during normal operation. This ensures reliable time acquisition even under extreme conditions. It employs a core algorithm developed by Zhongxin Chuang, resulting in lower external requirements and enhanced resistance to interference.

Leap Second Handling Technology — True Processing, Smooth Transition

Due to discrepancies among astronomical time (UT), atomic time (TAI), and Coordinated Universal Time (UTC), the International Bureau of Weights and Measures in Paris adjusts for leap seconds at midnight on July 30 and December 30 each year, in order to harmonize global timekeeping. This gives rise to what is known as the “leap‑second problem”—an irregular need to perform time‑synchronization adjustments that can disrupt time‑frequency industries. Many companies and enterprises face widespread issues of inconsistent system clocks caused by leap seconds, with some even experiencing system outages that impede normal operations. The prevailing workaround today involves re‑synchronizing systems after a leap second occurs using unreliable methods, which poses significant security risks. Some vendors fail to handle leap seconds correctly, often causing abrupt time jumps at inappropriate moments, leading to divergent client responses and introducing uncertainty into the system—potentially even resulting in complete system failure. By contrast, Zhongxin Chuang leverages proprietary core algorithms and specialized hardware designs to offer multiple leap‑second solutions. Customers can select the most suitable approach based on their system’s specific characteristics, ensuring consistent system time and mitigating potential instability.

China–New Zealand joint approach to leap second handling

1. Add a leap-second flag to the protocol, and have clients handle leap seconds in accordance with the standard protocol. The server’s time must strictly remain synchronized with UTC (stop for exactly one second, as defined by UTC).

2. For systems that cannot correctly handle leap‑second flag bits, the protocol does not include such a flag; instead, it gradually adjusts the clock over a specified time interval, evenly distributing the leap second across that period. This ensures that the system’s time remains strictly monotonic, with no abrupt jumps. (A smooth transition, enhancing safety) – Independently developed

Note

Some vendors commonly employ an unreliable workaround: when a leap second occurs, they deliberately refrain from transmitting the leap‑second flag, falsely assuming that the satellite has malfunctioned and forcibly stepping back one second. Under this approach, different clients may interpret the situation in divergent ways; if clients implement inconsistent handling, it can lead to system-wide outages.