GPS对时产品 "Times New Roman"">的主要功能

1.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，同时为将来电厂/ mso-hansi-font-family:"Times New Roman"">变电站改造扩建时增加或更改对时信号接口提供了方便；

2. 基于我国自主的北斗卫星导航系统, mso-hansi-font-family:"Times New Roman"">采用北斗GPS "Times New Roman"">双系统互为备用设计；

3.完善的北斗和GPS mso-hansi-font-family:"Times New Roman"">卫星信号监测，自动或手动选择卫星信号；

4.自动跟踪北斗和GPS mso-hansi-font-family:"Times New Roman"">卫星信号，提供互为备份的授时服务；

5.输出高精度1PPS mso-hansi-font-family:"Times New Roman"">、1PPM "Times New Roman"">、1PPH信号，授时精度优于20ns mso-hansi-font-family:"Times New Roman"">；

6.支持NTP/SNTP网络时间传输协议，用于网络授时

7.支持ARP mso-hansi-font-family:"Times New Roman"">、ICMP "Times New Roman"">、HTTP协议；

8.支持在NTP mso-hansi-font-family:"Times New Roman"">协议上的MD5 "Times New Roman"">认证授时；

9.提供IRIG-B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）码、1PPS "Times New Roman"">、1PPM、1PPH mso-hansi-font-family:"Times New Roman"">、串口RS232/485 "Times New Roman"">等对时接口；

10.支持上万个用户的网络授时服务

11.提供基于RS232 mso-hansi-font-family:"Times New Roman"">和网口UDP "Times New Roman"">协议的两种输出方式，同时输出周波、工频钟、时间信息

12.支持本地和远程管理。

13.GPS/北斗接收天线重点考虑了防雷设计、稳定性设计、抗干扰设计， "Times New Roman"">信号接收可靠性高，不受地域条件和环境的限制。

14.机箱经防磁处理，抗干扰能力强。

GPS对时产品 "Times New Roman"">的技术指标

1.GPS接收器

mso-hansi-font-family:"Times New Roman"">接收频率（GPS L1 "Times New Roman"">）：1575.42MHz "Times New Roman"">（L1信号）。

mso-hansi-font-family:"Times New Roman"">接收灵敏度：捕获〈-160dBW "Times New Roman"">，跟踪〈-163dBW "Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">同时跟踪：正常状态下可同时跟踪8 mso-hansi-font-family:"Times New Roman"">～16 "Times New Roman"">颗GPS卫星；

          mso-hansi-font-family:"Times New Roman"">装置冷启动时不小于4 "Times New Roman"">颗卫星；

          mso-hansi-font-family:"Times New Roman"">装置热启动时不小于1 "Times New Roman"">颗卫星。

mso-hansi-font-family:"Times New Roman"">捕获时间：装置冷启动时，〈1min "Times New Roman"">；装置热启动时，〈20s "Times New Roman"">。

2.北斗接收器

mso-hansi-font-family:"Times New Roman"">接收频率（BD2 B1 "Times New Roman"">）：1561.098 "Times New Roman"">±4MHz。

mso-hansi-font-family:"Times New Roman"">接收机灵敏度：-157.6dBW "Times New Roman"">；

mso-hansi-font-family:"Times New Roman"">速度精度(RMS) "Times New Roman"">：0.1m/s "Times New Roman"">；

3.电 "Times New Roman"">源:95～265V mso-hansi-font-family:"Times New Roman"">交流；110 "Times New Roman"">～250V直流，直流/ mso-hansi-font-family:"Times New Roman"">交流自适应。可配置双电源。

4.IRIG－B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）时间码:TTL "Times New Roman"">或RS422接口；B(AC) mso-hansi-font-family:"Times New Roman"">码，调制比3:1 , "Times New Roman"">幅度0～10VP-P mso-hansi-font-family:"Times New Roman"">可调，阻抗600 "Times New Roman"">Ω，平衡输出( "Times New Roman"">不共地)，B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）码同步准确度小于1 "Times New Roman"">μS，B mso-hansi-font-family:"Times New Roman"">（AC "Times New Roman"">）码同步准确度小于12 "Times New Roman"">μS。

5.脉冲输出:TTL mso-hansi-font-family:"Times New Roman"">电平接口，正脉冲上升沿有效，信号脉冲宽度200ms mso-hansi-font-family:"Times New Roman"">。空接点反压DC300V,

mso-hansi-font-family:"Times New Roman"">定时准确度：接收GPS "Times New Roman"">时，小于0.1 "Times New Roman"">微秒。接收B（DC mso-hansi-font-family:"Times New Roman"">）码时，小于1 "Times New Roman"">微秒。

6.NTP/SNTP网络授时: mso-hansi-font-family:"Times New Roman"">局域网：≤ 10 mS "Times New Roman"">；城域网：≤ 50mS "Times New Roman"">。

7.平均无故障间隔时间(MTBF) mso-hansi-font-family:"Times New Roman"">≥80000 "Times New Roman"">小时；平均维修时间（MTTR "Times New Roman"">）≤30分。正常使用条件下无需维护。

8.箱体结构尺寸: mso-hansi-font-family:"Times New Roman"">标准1U/2U "Times New Roman"">高，19英寸宽机架安装。

"Times New Roman"">更多GPS "Times New Roman"">对时产品介绍，敬请参阅上海锐呈电气有限公司网站