Time-Frequency Encyclopedia

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2019

Congratulations to the National University of Defense Technology on the procurement of the newly developed DNTS-6 time synchronization device.

Congratulations to the National University of Defense Technology on the procurement of the newly developed DNTS-6 time synchronization device.

Recently, the National University of Defense Technology issued a procurement announcement for time servers. Beijing Zhongxin Chuang Co., Ltd. proactively collaborated with the client to develop a detailed proposal and recommended its independently developed and manufactured DNTS‑6 model as the bid‑winning product. Following a fiercely competitive bidding process, Zhongxin Chuang stood out thanks to its high‑quality products and comprehensive after-sales service, ultimately securing the contract for the National University of Defense Technology’s time server project.

The National University of Defense Technology of the Chinese People’s Liberation Army, abbreviated as “NUDT,” is composed of… Central Military Commission of the Communist Party of China Directly affiliated, it was included among the 156 key national construction projects of the First Five-Year Plan, Project 211 、 Project 985 、 Double First-Class Initiative , the military “ Project 2110 It is one of the 20 key universities nationwide designated by the CPC Central Committee in 1959, among the first institutions approved by the State Council to confer master’s and doctoral degrees, and one of the first universities in China to pilot graduate schools.

The National University of Defense Technology conducted an in-depth evaluation of the DNTS‑6 time server independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the university expressed high satisfaction with both our product quality and after-sales service, leading to a successful procurement and deployment.

The network time server DNTS-6, developed by Beijing Zhongxinchuang Technology Co., Ltd., is a high-tech, intelligent, stand-alone time server based on the NTP/SNTP protocols. DNTS-6 obtains standard clock signal information from GPS geostationary satellites and transmits this information over the network, enabling devices that require time signals—such as computers and controllers—to synchronize with the standard clock. Standard clock information is transmitted via the TCP/IP network, and DNTS-6 supports multiple popular time‑broadcasting protocols, including NTP and time/UDP, as well as Zhongxinchuang’s proprietary time‑broadcast packets with configurable UDP ports. The port numbers for NTP and time/UDP are fixed at 123 and 37, respectively, as specified in RFC-123 and RFC-37. Additionally, DNTS-6 supports the broadcast mode of the SNTP protocol.

Network Protocol:	NTP v1, v2, v3, and v4 (RFC 1119 and RFC 1305) SNTP (RFC 2030) MD5 Authentication (RFC 1321) Telnet (RFC 854) UDP NTP Unicast, Broadcast, Multicast, Autokey TIME (RFC 868) FTP (RFC 959) DAYTIME (RFC 867) DHCP (RFC 2131)
	HTTP, SNMP v1 and v2, MIB II (RFC 1213), RSA asymmetric encryption
	IPV4
NTP Server Performance:	GPS/BD clock reference mode, Tier‑1 network time server, internal synchronization accuracy of 1 µs.
	User terminal synchronization timing accuracy: 0.5–2 ms (typical value on a local area network)
	User capacity: Supports thousands of clients.
	NTP request rate: 2,000 requests per second (per network port)
	Supports the latest 50 log entries (per single network port)
GPS/BD receiver:	50-channel timing‑grade GPS/BD receiver, with options for single‑GPS, single‑BD, or GPS/BD dual‑mode operation.
	UTC synchronization accuracy: 30 ns (RMS)
	Receives L1 C/A code signal at 1575.42 MHz
	Tracking and lock‑on sensitivity can reach −160 dBm.
Front panel:	VFD high-brightness LCD display
	Displays GPS/BD satellite acquisition status, time, number of GPS/BD satellites, IP addresses of each network port, system operating status, and more.
	Indicator lights: SAT, E1–E2
	Indicates whether the NTP service is running and whether the network connection is normal.
Rear panel:	GPS/BD antenna input: BNC, 1 channel, L1, 1575.42 MHz, output 3.3 V DC
	Network port: RJ-45, 1–2 ports (optional depending on model), 10/100 Mbps auto‑negotiating Ethernet interface
	1 PPS output: BNC, 1 channel, TTL level, accuracy 20 ns (RMS)
	TOD Output: DB-9 female, 1 channel, RS232/RS485 interface
Physical and environmental parameters:	Dimensions: 1U chassis, 435×44×230 mm
	Weight: 3 kg
	Power supply: AC 220 V ±20%, 47 Hz to 63 Hz
	Operating temperature: -40°C to +80°C (equipment), -40°C to +85°C (antenna)
	Storage temperature: -45°C to +85°C
	Humidity: 95% non-condensing ● Power consumption: 15W
Time synchronization software performance
Client-side time synchronization software:	Provides NTP‑based time‑synchronization software for Windows, running as a service and offering a monitoring, control, and configuration interface. Client support includes operating systems such as Windows 98, NT, 2000, XP, Vista, 7, Unix, Linux, AIX, and others.

With 17 years of industry experience, our company has established a strong corporate reputation and brand image, serving… Educational institutions

Our clients also include:

Peking University, Tsinghua University, the Central Party School, Tongji University, Wuhan University, Harbin Institute of Technology, the People’s Public Security University of China, Beihang University, China University of Petroleum, the National Academy of Administration, Nankai University, the China Academy of Traditional Chinese Opera, Beijing University of Science and Technology, Beijing University of Technology, North China Electric Power University, Beijing University of Mining and Technology, North China University of Technology, Beijing Foreign Studies University, Beijing Institute of Technology, Dalian Maritime University, Xi’an Jiaotong University, Beijing Institute of Petrochemical Technology, Beijing Normal University, the Party School of the Beijing Municipal Health Bureau, Beijing Technology and Business University, Northeast Forestry University, Changchun University, Changsha University of Science and Technology, and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services. Our company will continue to uphold our corporate mission of “Innovative Technology, Serving a Better Life” and pursue the corporate goal of “Becoming a Creator of Exceptional Quality,” working in sincere collaboration with partners across all sectors to achieve mutual success and shared progress for both our enterprise and society.

Congratulations to Shenhua Inner Mongolia Guohua Hulunbuir Power Generation on winning the bid for the Zhongxin Chuang Time Synchronization Equipment Project.

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Congratulations to Shenhua Inner Mongolia Guohua Hulunbuir Power Generation on winning the bid for the Zhongxin Chuang Time Synchronization Equipment Project.

Congratulations to Zhongxin Chuang on winning the bid for the clock synchronization equipment project at Linshu County People’s Hospital.