"Times New Roman"">上海锐呈电气有限公司研发了高精度高稳定性的NTP "Times New Roman"">网络时钟,该装置使用GPS mso-hansi-font-family:"Times New Roman"">信号作为时间源,同时可选北斗、CDMA mso-hansi-font-family:"Times New Roman"">、IRIG-B "Times New Roman"">、OCXO、铷原子钟等时间源,通过NTP mso-hansi-font-family:"Times New Roman"">协议对网络内的服务器和网络设备的时间进行同步。
NTP
mso-hansi-font-family:"Times New Roman"">是采用Client/Server
"Times New Roman"">模式,NTP客户端借助NTP
mso-hansi-font-family:"Times New Roman"">协议,从NTP
"Times New Roman"">服 务
"Times New Roman"">器获取准确的时间。NTP
"Times New Roman"">不仅校正时间,而且能够持续跟踪时间的变化,并自动进行调节,从而使采用NTP
"Times New Roman"">协议的客户端能从网络中获取可靠和准确的时间同步。
NTP网络时钟 "Times New Roman"">的性能指标:
mso-hansi-font-family:"Times New Roman"">网络授时精度 |
mso-hansi-font-family:"Times New Roman"">局域网 |
0.2ms-10ms |
mso-hansi-font-family:"Times New Roman"">广域网 |
10ms-100ms |
|
mso-hansi-font-family:"Times New Roman"">串口时码输出 |
ASCII格式 |
mso-hansi-font-family:"Times New Roman"">同步精度优于0.2ms "Times New Roman"">。 |
1PPS信号 |
mso-hansi-font-family:"Times New Roman"">授时精度 |
mso-hansi-font-family:"Times New Roman"">优于30 "Times New Roman"">纳秒 |
mso-hansi-font-family:"Times New Roman"">信号电平 |
TTL电平 |
|
mso-hansi-font-family:"Times New Roman"">产品特性 |
mso-hansi-font-family:"Times New Roman"">外形尺寸(长× "Times New Roman"">宽×高) |
440mm×280mm×44mm |
mso-hansi-font-family:"Times New Roman"">重量 |
2.8Kg |
|
mso-hansi-font-family:"Times New Roman"">输入电压 |
AC:220V/50Hz |
|
mso-hansi-font-family:"Times New Roman"">功耗 |
<15W |
|
mso-hansi-font-family:"Times New Roman"">使用寿命 |
mso-hansi-font-family:"Times New Roman"">不少于20 "Times New Roman"">年 |
|
mso-hansi-font-family:"Times New Roman"">平均无故障间隔时间(MTBF) |
≥80000小时 |
|
mso-hansi-font-family:"Times New Roman"">工作环境 |
mso-hansi-font-family:"Times New Roman"">工作温度 |
mso-hansi-font-family:"Times New Roman"">-20 "Times New Roman"">℃~50℃ |
|
mso-hansi-font-family:"Times New Roman"">工作湿度 |
20%~80% mso-hansi-font-family:"Times New Roman"">,非凝露 |
NTP "Times New Roman"">网络时钟的主要特点
1 "Times New Roman"">.高带宽NTP "Times New Roman"">时间服务器 2.锁定GPS mso-hansi-font-family:"Times New Roman"">北斗
3 "Times New Roman"">.4个独立10/100base-T自适应网 4 "Times New Roman"">.高分辩率真空荧光显示屏
5 "Times New Roman"">.全数字小键盘 6 "Times New Roman"">.支持 IPv6 "Times New Roman"">和 IPv4 "Times New Roman"">协议
7 "Times New Roman"">.基于网络的安全管理 8.锁定NTP mso-hansi-font-family:"Times New Roman"">服务器
9 "Times New Roman"">.纳秒级的时间准确度(相对于UTC)
10 "Times New Roman"">.支持NTP/SNTP, SSH, SSL, SCP, SNMP v3, Custom MIB, HTTPS, Telnet等更多协议
11 "Times New Roman"">.独立时间参考源: GPS "Times New Roman"">或北斗 12.单星授时功能
13 "Times New Roman"">.可升级振荡器:铷钟 & OCXO
14 "Times New Roman"">.可同时为几十万台客户端、服务器、工作站提供时间授时服务。
15 "Times New Roman"">.支持WINDOWS9X/NT/2000/XP/2003/2008/2012/vista "Times New Roman"">、LINUX、HP-UX mso-hansi-font-family:"Times New Roman"">等操作系统及支持NTP "Times New Roman"">协议的路由器、交换机、智能控制器等网络设备。
16
"Times New Roman"">.装置采用全模块化即插即用结构设计,支持板卡热插拔,配置灵活,维护方便,同时为将来现场网络改造扩建时增加对时端口提供了方便。
NTP "Times New Roman"">网络时钟授时方案
方案1 mso-hansi-font-family:"Times New Roman"">:局域网单台时间服务器的时钟同步
装置以接收到的GPS/ mso-hansi-font-family:"Times New Roman"">北斗信息(串口+1PPS "Times New Roman"">)为时间源,通过NTP/SNTP "Times New Roman"">协议同步网络中的计算机、路由器、交换机、智能控制器等设备, "Times New Roman"">实现网络授时。大部分操作系统都自带NTP "Times New Roman"">服务,只需做一下设置即可。我公司也提供NTP "Times New Roman"">客户端软件,安装运行也可实现同步。
方案2 mso-hansi-font-family:"Times New Roman"">:局域网两台时间服务器冗余的时钟同步
全网配置一套时间同步系统,由两台K801 mso-hansi-font-family:"Times New Roman"">主时钟、交换机、网络和客户端组成。两台K801 mso-hansi-font-family:"Times New Roman"">主时钟放置在机房交换机机柜中,以NTP/SNTP 协议方式向全网的客户端授时。两台K801 mso-hansi-font-family:"Times New Roman"">主时钟通过B "Times New Roman"">码互联以冗余热备模式工作,提高了系统的可靠性。
上海锐呈是NTP网络时钟
"Times New Roman"">的生产厂家