Time-Frequency Encyclopedia

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2019

Zhongxin Chuangwei provides a precision clock to China Central Television.

Recently, China Central Television Published Time server of Demand , Beijing Zhongxin Chuang Company is actively cooperating. For users A detailed plan has been prepared, and the independently developed and manufactured products of Zhongxin Chuang have been recommended. DNTS- 9 o’clock and DNHH-9 handheld carrying clock Type As the product submitted for this tender, Zhongxin Chuang stood out by defeating competitors’ offerings thanks to its high‑quality products and comprehensive after‑sales service, ultimately… CCTV Clock Synchronization Project 。

China Central Television (English name: China Central Television, commonly known as CCTV, is the national television broadcaster of the People’s Republic of China and a state‑level institution at the vice‑ministerial level. Established on May 1, 1958, it serves as China’s principal news and public opinion outlet and a key platform for ideological and cultural engagement, performing a wide range of functions including news dissemination, social education, cultural entertainment, and information services.

China Central Television To China–Singapore Innovation Independently developed DNTS- Type 9 Clock Server Conduct an in-depth evaluation and arrive at the final results. All are superior to the parameter requirements. ， And also Regarding our company’s product quality and after-sales service Also quite satisfied. ， Procured successfully and put into use. ！

The network time server developed by Beijing Zhongxinchuang Technology Co., Ltd. The DNTS‑9 is an advanced, intelligent, high‑precision NTP network time server. It obtains standard time information from navigation and positioning satellite systems such as GPS, BeiDou, GLONASS, and Galileo, and provides standard time services over the network via NTP/SNTP or other network protocols. Devices requiring time synchronization—such as personal computers, servers, and controllers—can thereby align with international standard time. When used with a GNSS receiver, the system allows priority configuration and supports single‑receiver/dual‑receiver and single‑antenna/dual‑antenna setups; each receiver can be configured individually or in combination to operate in different timing modes. If both receivers and all other available time sources lose signal, the DNTS‑9 switches to its built‑in temperature‑compensated crystal oscillator or rubidium atomic clock for holdover, continuously delivering time services to external clients.

In addition to serving as a primary‑level network time‑synchronization device, the DNTS‑9 can also function as a secondary‑level time server, enabling more effective time synchronization in large‑scale network environments. The DNTS‑9 network time server is extremely easy to install and deploy: simply connect the satellite receiving antenna and link the Ethernet port to a network switch to achieve time synchronization across all devices on the network.

Network protocol	NTP v1, v2, v3, and v4 (RFC 1119 and RFC 1305), SNTP (RFC 2030), 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/SSL/HTTPS (RFC 2616), SSH/SCP (Internet Draft), SNMP v1, v2c, and v3, MIB II (RFC 1213), RSA asymmetric encryption, MD5 authentication, SHA authentication, AES encryption, DES encryption, RC4 encryption.
	IPv4, IPv6, IPv4/IPv6 Hybrid
Timekeeping mode	Support NTP Peer Client/Server Broadcast Multicast
Server performance	GNSS reference mode, Tier‑1 network time server, with an internal synchronization accuracy of 20 ns.
	User terminal synchronization timing accuracy: 0.1–2 ms (typical value for a LAN)
	User capacity: Supports tens of thousands of clients.
	NTP request rate: 25,000 requests per second (per network port)
	Can be used as a client to synchronize with others. NTP network time server
	Support 100,000 log entries; storage capacity can be expanded as needed.
Receiver	72-channel timing‑grade GNSS receiver, multi‑constellation GPS/BeiDou/GLONASS, supports RAIM, with optional CDMA support.
	UTC synchronization accuracy: 20 ns (RMS)
	Tracking and locking sensitivity can reach -166dBm
Timekeeping function	Temperature‑compensated crystal oscillator (optional depending on model): Timing accuracy: standard configuration better than 8.6 µs/day (configurable and upgradeable to meet different requirements)
Timekeeping function	Rubidium atomic clock (optional depending on model): Timing accuracy: standard configuration superior to 500 ns/day (configurable upgrades available to meet varying requirements)
Front panel	VFD high-brightness LCD display
	Display GPS/BD satellite reception status, time, number of GPS/BD satellites, IP addresses of each network port, system operating status, etc.
	6 tri-color indicator lights: PWR, ANT, SAT, LOCK, NTP, ALARM
	Signals indicating power, antenna, satellite, lock, timing, and alarms.

After a long… With 17 years of industry experience, our company has established a strong corporate reputation and brand image, serving… Broadcasting and Television Industry Our clients also include:

The State Administration of Radio, Film, and Television, the National Radio and Television Monitoring Center, Sichuan Radio and Television Network Co., Ltd., Tianjin Radio and Television Station, Yunnan People’s Broadcasting Station, Guangxi Radio and Television Center, Inner Mongolia Radio and Television Network Co., Ltd., Hubei Provincial Radio and Television Group, Jiangsu Provincial Radio and Television Group, Shanxi Radio and Television Network Co., Ltd., Henan Radio and Television Network Co., Ltd., Shanghai Culture, Radio, Film and Television Group, Xiangfan Cable Radio and Television Network Center, Tongliao Bureau of Radio, Film, and Television, Guangzhou Coast Radio Station, Dali Cangshan Television Relay Station, Tianjin Radio, Film, and Television Group, Guangxi Radio and Television Technology Center, Jiangyin Radio and Television Network Transmission Center, Jiangxi Radio and Television Network Co., Ltd., and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services, and our company will continue to… With the corporate mission of “Innovating Technology, Serving a Better Life,” we collaborate sincerely with partners from all sectors to jointly achieve win-win outcomes and shared progress for both our enterprise and society!

Zhongxin Chuangwei provides a precision clock for Chongqing Welfare Lottery.

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Zhongxin Chuangwei provides a precision clock for Chongqing Welfare Lottery.

Zhongxin Chuangwei provides a precision clock to the People’s Bank of China.