北斗校時服務器
"Times New Roman"">工作原理:GPS
"Times New Roman"">北斗信號接收器接收多顆GPS
"Times New Roman"">北斗衛(wèi)星發(fā)送的信號頻率為1575.42Mhz
"Times New Roman"">(GPS)/1561.098±4MHz(
mso-hansi-font-family:"Times New Roman"">北斗)
"Times New Roman"">的UTC信號,經(jīng)處理輸出NMEA0183格式或其它標準的信息。微處理單元(MCU)
mso-hansi-font-family:"Times New Roman"">對上述信息進行后續(xù)處理,并換算成北京時間等信息后送液晶顯示,并按照一定格式和方式經(jīng)接口電路輸出。一旦短時間發(fā)生GPS
mso-hansi-font-family:"Times New Roman"">北斗不同步時,系統(tǒng)將自動進行準確的時鐘守時。
"Times New Roman"">北斗校時服務器主要特點:
1、箱體采用鋁合金材料,抗干擾性能力強。采用功能模塊后插方式,結構緊湊,根據(jù)現(xiàn)場需要更改、配置方便,擴展靈活,維修方便。
2、時間精度高,脈沖對時精度可達0.1 mso-hansi-font-family:"Times New Roman"">微秒以內(nèi)。
3、具有多種對時輸出接口,NTP mso-hansi-font-family:"Times New Roman"">網(wǎng)絡對時;脈沖對時;串行口對時;IRIG mso-hansi-font-family:"Times New Roman"">-B "Times New Roman"">碼對時,DCF77 "Times New Roman"">碼對,對時輸出信號均為隔離輸出。
4、輸出通道多,組合方便,可由用戶根據(jù)需要選擇搭配。
5、具有失電和衛(wèi)星失鎖報警2 mso-hansi-font-family:"Times New Roman"">組繼電器接點輸出。
6、面板設有LED mso-hansi-font-family:"Times New Roman"">數(shù)碼管顯示,可顯示年、月、日、時、分、秒;另有LED mso-hansi-font-family:"Times New Roman"">發(fā)光管指示工作狀態(tài)。
7、高品質(zhì)的工業(yè)級元件,高水準的電氣設計,高密度集成的電路結構,使裝置擁有電氣隔離和電磁屏蔽表現(xiàn),整機無可調(diào)節(jié)器件,提高了裝置抗干擾性能與可靠性保障。
8、采用雙電源冗余供電,并選用高性能、寬范圍開關電源,工作穩(wěn)定可靠,裝置電源供電自適應。(按訂貨技術協(xié)議配置,缺省為單電源。)
9、GPS/
mso-hansi-font-family:"Times New Roman"">北斗接收天線重點考慮了防雷設計、穩(wěn)定性設計、抗干擾設計,
"Times New Roman"">信號接收可靠性高,不受地域條件和環(huán)境的限制。
"Times New Roman"">北斗校時服務器技術指標:
1、GPS mso-hansi-font-family:"Times New Roman"">接收器接收頻率:1575.42MHz "Times New Roman"">;接收靈敏度:捕獲〈-160dBW "Times New Roman"">,跟蹤〈-163dBW "Times New Roman"">;捕獲時間:裝置冷啟動時,〈3min "Times New Roman"">,裝置熱啟動時,〈15S "Times New Roman"">;內(nèi)部電池類型:鋰電池,電池壽命:≮25000h "Times New Roman"">。
2、北斗接收器
mso-hansi-font-family:"Times New Roman"">接收頻率(BD2 B1 "Times New Roman"">):1561.098 "Times New Roman"">±4MHz。
mso-hansi-font-family:"Times New Roman"">接收機靈敏度:-157.6dBW "Times New Roman"">;
3、輸出頻率: 10MHz mso-hansi-font-family:"Times New Roman"">、1PPS
?? "Times New Roman"">輸出電平: 1PPS "Times New Roman"">輸出方波TTL "Times New Roman"">電平
?????????????????????????? 10MHz "Times New Roman"">輸出正弦波12.5dBm
1PPS精度:?????????????????? "Times New Roman"">優(yōu)于20nS
10MHz頻率精度:≤1.2 mso-hansi-font-family:"Times New Roman"">×10-12/24h "Times New Roman"">平均
mso-hansi-font-family:"Times New Roman"">諧波:-40dBc
mso-hansi-font-family:"Times New Roman"">雜散:-70dBc
mso-hansi-font-family:"Times New Roman"">相位噪聲:10Hz-120dBc/Hz
??????????????????????? 100Hz?? -135dBc/Hz
??????????????????????? 1KHz??? -135dBc/Hz
??????????????????????? 10KHz?? -145dBc/Hz
???????????????????? ???100KHz? -145dBc/Hz
4、對時精度:脈沖、B mso-hansi-font-family:"Times New Roman"">碼: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、平均無故障間隔時間(MTBF) mso-hansi-font-family:"Times New Roman"">≥80000 "Times New Roman"">小時;平均維修時間(MTTR "Times New Roman"">):一般不大于30 "Times New Roman"">分,正常使用條件下無須維護。
6、NTP mso-hansi-font-family:"Times New Roman"">協(xié)議時間支持協(xié)議:NTP,SNTP,Web,Telnet,ARP,UDP,TCP,IP,ICMP,SNMP,MD5,DHCP "Times New Roman"">和TFTP;網(wǎng)絡接口:10/100M自適應以太網(wǎng)接口,RJ mso-hansi-font-family:"Times New Roman"">-45 "Times New Roman"">;吞吐量:滿足每秒10000 "Times New Roman"">次時間請求。
7、功耗:≤20W mso-hansi-font-family:"Times New Roman"">。
8、絕緣電阻:≮20M mso-hansi-font-family:"Times New Roman"">Ω。
"Times New Roman"">以上是北斗校時服務器的簡介
?