"Times New Roman"">北斗同步時(shí)鐘服務(wù)器的主要功能

1.裝置采用全模塊化即插即用結(jié)構(gòu)設(shè)計(jì)，支持板卡熱插拔，配置靈活，維護(hù)方便，同時(shí)為將來(lái)電廠/ mso-hansi-font-family:"Times New Roman"">變電站改造擴(kuò)建時(shí)增加或更改對(duì)時(shí)信號(hào)接口提供了方便；

2. 基于我國(guó)自主的北斗衛(wèi)星導(dǎo)航系統(tǒng), mso-hansi-font-family:"Times New Roman"">采用北斗GPS "Times New Roman"">雙系統(tǒng)互為備用設(shè)計(jì)；

3.完善的北斗和GPS mso-hansi-font-family:"Times New Roman"">衛(wèi)星信號(hào)監(jiān)測(cè)，自動(dòng)或手動(dòng)選擇衛(wèi)星信號(hào)；

4.自動(dòng)跟蹤北斗和GPS mso-hansi-font-family:"Times New Roman"">衛(wèi)星信號(hào)，提供互為備份的授時(shí)服務(wù)；

5.輸出高精度1PPS mso-hansi-font-family:"Times New Roman"">、1PPM "Times New Roman"">、1PPH信號(hào)，授時(shí)精度優(yōu)于20ns mso-hansi-font-family:"Times New Roman"">；

6.支持NTP/SNTP網(wǎng)絡(luò)時(shí)間傳輸協(xié)議，用于網(wǎng)絡(luò)授時(shí)

7.支持ARP mso-hansi-font-family:"Times New Roman"">、ICMP "Times New Roman"">、HTTP協(xié)議；

8.支持在NTP mso-hansi-font-family:"Times New Roman"">協(xié)議上的MD5 "Times New Roman"">認(rèn)證授時(shí)；

9.提供IRIG-B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）碼、1PPS "Times New Roman"">、1PPM、1PPH mso-hansi-font-family:"Times New Roman"">、串口RS232/485 "Times New Roman"">等對(duì)時(shí)接口；

10.支持上萬(wàn)個(gè)用戶的網(wǎng)絡(luò)授時(shí)服務(wù)

11.提供基于RS232 mso-hansi-font-family:"Times New Roman"">和網(wǎng)口UDP "Times New Roman"">協(xié)議的兩種輸出方式，同時(shí)輸出周波、工頻鐘、時(shí)間信息

12.支持本地和遠(yuǎn)程管理。

13.GPS/北斗接收天線重點(diǎn)考慮了防雷設(shè)計(jì)、穩(wěn)定性設(shè)計(jì)、抗干擾設(shè)計(jì)， "Times New Roman"">信號(hào)接收可靠性高，不受地域條件和環(huán)境的限制。

14.機(jī)箱經(jīng)防磁處理，抗干擾能力強(qiáng)。

"Times New Roman"">北斗同步時(shí)鐘服務(wù)器的技術(shù)指標(biāo)

1.GPS接收器

mso-hansi-font-family:"Times New Roman"">接收頻率（GPS L1 "Times New Roman"">）：1575.42MHz "Times New Roman"">（L1信號(hào)）。

mso-hansi-font-family:"Times New Roman"">接收靈敏度：捕獲〈-160dBW "Times New Roman"">，跟蹤〈-163dBW "Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">同時(shí)跟蹤：正常狀態(tài)下可同時(shí)跟蹤8 mso-hansi-font-family:"Times New Roman"">～16 "Times New Roman"">顆GPS衛(wèi)星；

          mso-hansi-font-family:"Times New Roman"">裝置冷啟動(dòng)時(shí)不小于4 "Times New Roman"">顆衛(wèi)星；

          mso-hansi-font-family:"Times New Roman"">裝置熱啟動(dòng)時(shí)不小于1 "Times New Roman"">顆衛(wèi)星。

mso-hansi-font-family:"Times New Roman"">捕獲時(shí)間：裝置冷啟動(dòng)時(shí)，〈1min "Times New Roman"">；裝置熱啟動(dòng)時(shí)，〈20s "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(jī)靈敏度：-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.電 "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"">交流自適應(yīng)?？膳渲秒p電源。

4.IRIG－B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）時(shí)間碼:TTL "Times New Roman"">或RS422接口；B(AC) mso-hansi-font-family:"Times New Roman"">碼，調(diào)制比3:1 , "Times New Roman"">幅度0～10VP-P mso-hansi-font-family:"Times New Roman"">可調(diào)，阻抗600 "Times New Roman"">Ω，平衡輸出( "Times New Roman"">不共地)，B mso-hansi-font-family:"Times New Roman"">（DC "Times New Roman"">）碼同步準(zhǔn)確度小于1 "Times New Roman"">μS，B mso-hansi-font-family:"Times New Roman"">（AC "Times New Roman"">）碼同步準(zhǔn)確度小于12 "Times New Roman"">μS。

5.脈沖輸出:TTL mso-hansi-font-family:"Times New Roman"">電平接口，正脈沖上升沿有效，信號(hào)脈沖寬度200ms mso-hansi-font-family:"Times New Roman"">。空接點(diǎn)反壓DC300V,

mso-hansi-font-family:"Times New Roman"">定時(shí)準(zhǔn)確度：接收GPS "Times New Roman"">時(shí)，小于0.1 "Times New Roman"">微秒。接收B（DC mso-hansi-font-family:"Times New Roman"">）碼時(shí)，小于1 "Times New Roman"">微秒。

6.NTP/SNTP網(wǎng)絡(luò)授時(shí): mso-hansi-font-family:"Times New Roman"">局域網(wǎng)：≤ 10 mS "Times New Roman"">；城域網(wǎng)：≤ 50mS "Times New Roman"">。

7.平均無(wú)故障間隔時(shí)間(MTBF) mso-hansi-font-family:"Times New Roman"">≥80000 "Times New Roman"">小時(shí)；平均維修時(shí)間（MTTR "Times New Roman"">）≤30分。正常使用條件下無(wú)需維護(hù)。

8.箱體結(jié)構(gòu)尺寸: mso-hansi-font-family:"Times New Roman"">標(biāo)準(zhǔn)1U/2U "Times New Roman"">高，19英寸寬機(jī)架安裝。

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