北斗时间同步时钟
"Times New Roman"">工作原理:GPS
"Times New Roman"">北斗信号接收器接收多颗GPS
"Times New Roman"">北斗卫星发送的信号频率为1575.42Mhz
"Times New Roman"">(GPS)/1561.098±4MHz(
mso-hansi-font-family:"Times New Roman"">北斗)
"Times New Roman"">的UTC信号,经处理输出NMEA0183格式或其它标准的信息。微处理单元(MCU)
mso-hansi-font-family:"Times New Roman"">对上述信息进行后续处理,并换算成北京时间等信息后送液晶显示,并按照一定格式和方式经接口电路输出。一旦短时间发生GPS
mso-hansi-font-family:"Times New Roman"">北斗不同步时,系统将自动进行准确的时钟守时。
"Times New Roman"">北斗时间同步时钟主要特点:
1、箱体采用铝合金材料,抗干扰性能力强。采用功能模块后插方式,结构紧凑,根据现场需要更改、配置方便,扩展灵活,维修方便。
2、时间精度高,脉冲对时精度可达0.1 mso-hansi-font-family:"Times New Roman"">微秒以内。
3、具有多种对时输出接口,NTP mso-hansi-font-family:"Times New Roman"">网络对时;脉冲对时;串行口对时;IRIG mso-hansi-font-family:"Times New Roman"">-B "Times New Roman"">码对时,DCF77 "Times New Roman"">码对,对时输出信号均为隔离输出。
4、输出通道多,组合方便,可由用户根据需要选择搭配。
5、具有失电和卫星失锁报警2 mso-hansi-font-family:"Times New Roman"">组继电器接点输出。
6、面板设有LED mso-hansi-font-family:"Times New Roman"">数码管显示,可显示年、月、日、时、分、秒;另有LED mso-hansi-font-family:"Times New Roman"">发光管指示工作状态。
7、高品质的工业级元件,高水准的电气设计,高密度集成的电路结构,使装置拥有电气隔离和电磁屏蔽表现,整机无可调节器件,提高了装置抗干扰性能与可靠性保障。
8、采用双电源冗余供电,并选用高性能、宽范围开关电源,工作稳定可靠,装置电源供电自适应。(按订货技术协议配置,缺省为单电源。)
9、GPS/
mso-hansi-font-family:"Times New Roman"">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。
"Times New Roman"">北斗时间同步时钟技术指标:
1、GPS mso-hansi-font-family:"Times New Roman"">接收器接收频率:1575.42MHz "Times New Roman"">;接收灵敏度:捕获〈-160dBW "Times New Roman"">,跟踪〈-163dBW "Times New Roman"">;捕获时间:装置冷启动时,〈3min "Times New Roman"">,装置热启动时,〈15S "Times New Roman"">;内部电池类型:锂电池,电池寿命:≮25000h "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"">;
3、输出频率: 10MHz mso-hansi-font-family:"Times New Roman"">、1PPS
"Times New Roman"">输出电平: 1PPS "Times New Roman"">输出方波TTL "Times New Roman"">电平
10MHz "Times New Roman"">输出正弦波12.5dBm
1PPS精度: "Times New Roman"">优于20nS
10MHz频率精度:≤1.2 mso-hansi-font-family:"Times New Roman"">×10-12/24h "Times New Roman"">平均
mso-hansi-font-family:"Times New Roman"">谐波:-40dBc
mso-hansi-font-family:"Times New Roman"">杂散:-70dBc
mso-hansi-font-family:"Times New Roman"">相位噪声:10Hz-120dBc/Hz
100Hz -135dBc/Hz
1KHz -135dBc/Hz
10KHz -145dBc/Hz
100KHz -145dBc/Hz
4、对时精度:脉冲、B mso-hansi-font-family:"Times New Roman"">码:0.1 "Times New Roman"">μS,串口:10 mso-hansi-font-family:"Times New Roman"">μS "Times New Roman"">,NTP/SNTP "Times New Roman"">:0.2-10ms "Times New Roman"">,PTP:70 ns "Times New Roman"">;
5、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"">):一般不大于30 "Times New Roman"">分,正常使用条件下无须维护。
6、NTP mso-hansi-font-family:"Times New Roman"">协议时间支持协议:NTP,SNTP,Web,Telnet,ARP,UDP,TCP,IP,ICMP,SNMP,MD5,DHCP "Times New Roman"">和TFTP;网络接口:10/100M自适应以太网接口,RJ mso-hansi-font-family:"Times New Roman"">-45 "Times New Roman"">;吞吐量:满足每秒10000 "Times New Roman"">次时间请求。
7、功耗:≤20W mso-hansi-font-family:"Times New Roman"">。
8、绝缘电阻:≮20M mso-hansi-font-family:"Times New Roman"">Ω。
"Times New Roman"">以上是北斗时间同步时钟的简介