1. BOB commissioning process:
1. BOB yekumisikidza maitiro eHDV Phoelectron Technology LTD:
Iyo inonyanya kugadzirisa iyo optical simba uye yeziso mepu yekudzima chiyero chekupedzisira chekufambisa, uye anogamuchira anofanirwa kuenzanisa manzwiro ayo uye RSSI yekutarisa.
BOB commissioning index:
| test | parameter | specifications | unit | mashoko | |||
| basa | hunhu | tsananguro | Min. | Typ. | Max | ||
| Debugging chikamu | TxPower | Tx kutumira simba | 1.2 | 1.5 | 1.8 | dBm | Kune iyo chaiyo kuyerwa, iyo index inogona kuvandudzwa maererano neBOSA performance |
| ExtRatio | extinction ratio | 9.5 | 12 | 14 | dB | ||
| EyeCross | mharadzano yedhiyagiramu yeziso | 45 | 50 | 55 | ％ | ||
| RxPoCalPoint_0 | Iyo Rx calibration ndiyo yekutanga parameter mamiriro | -10 | -10 | -10 | dB | ||
| RxPoCalPoint_1 | Rx calibration yechipiri parameter mamiriro | -20 | -20 | -20 | dB | ||
| RxPoCalPoint_2 | Iyo Rx calibration yechitatu parameter mamiriro | -30 | -30 | -30 | dB | ||
| Kuedza chikamu | TxPower | Tx kutumira simba | 0.5 | 2.5 | 4 | dBm | Kune iyo chaiyo kuyerwa, iyo index inogona kuvandudzwa maererano neBOSA performance |
| TxPo_DDM | Kutumira chekutarisa optical simba | 0.5 | 2.5 | 4 | dB | ||
| DiffTxPower | Kutumira chekutarisa optical simba musiyano | -1 | 0 | 1 | ％ | ||
| ExtRatio | Emission extinction ratio | 9 | 11 | 14 | dB | Kune iyo chaiyo kuyerwa, iyo index inogona kuvandudzwa maererano neBOSA performance | |
| EyeCross | mharadzano yedhiyagiramu yeziso | 45 | 50 | 55 | dB | ||
| EyeMargin | Ziso Dhiyagiramu Magin | 10 | 10 | 10 | dB | ||
| TxCurrent | emission current | 180 | |||||
| TotalCurrent | total current | 100 | 250 | 300 | |||
| Sensitivity | kunzwa | -27 | -27 | ||||
2. BOB yekubatanidza dhizaini yeHDV Phoelectron Technology LTD.:
Yakajairika BOB bvunzo yekubatanidza dhizaini, imwe-nzira bvunzo, yakaoma yekunze yekubatanidza, iyo attenuator, kukanganisa mita, simba mita, CDR uye zvimwe zvishandiso zvinoda kutengwa zvakasiyana.Imwe neimwe nzvimbo yekushandira inoda komputa kutsigira bvunzo.
1. Kuunzwa kweES-BOBT8 akatevedzana BOB bvunzo michina:
2. Inogona kutsigira kusvika ku8 migero yeBOB test, Internal integrated power mita uye attenuator, inogona kupedza kutumira uye kugamuchira debugging uye kuedza panguva imwe chete;
3. Yakabatanidzwa BERT basa uye 2xSFP + light source interface, inogona kutsigira 1.25G ~ 10G optical signal output, kuti ipe chiratidzo chechiedza cheBOB senitivity test;
4. Integrated CDR Trigger out, mukati-self-built clock signal recovery, inogona kupa chiratidzo chewachi chinodiwa chekuongorora dhiyabhorosi yemaziso;
5. Self-contained calibration magetsi mita inogona kupa yakajairika optical simba calibration kuona.
ES-BOBT8 yakatevedzana BOB bvunzo sisitimu inopa yakakwana seti yebvunzo michina mhinduro, iyo inogona kupa huwandu hwe8 chiteshi cheONU BOB bvunzo.Iyo BER tester uye light source, attenuator, simba mita, wavelength division, optical switch uye zvimwe midziyo zvakabatanidzwa mune imwe mudziyo, ine nyanzvi BOB test automation software, inogona kupa seti yakakwana yeBOB bvunzo mhinduro.
2,Hardware working principle:
Basa reES-BOBT8 akatevedzana eBOB hardware masisitimu:
1.Muchigadzirwa chekugadzira, tarisa kana iyo ONU optical port luminous simba yakajairika munguva chaiyo
2.Check kana iyo yakagamuchirwa optical power value inoverengwa neONU optical port yakarurama.
Kushanda musimboti weiyo Hardware system:
1. Iyo yepamusoro komputa software musystem yekushandisa yakabatana neiyo USB interface yeSCM U1 (modhi C8051F340) kuburikidza ne USB interface mu test system kuona man-machine interconnection;
2. The SCM U1 (modhi C8051F340) inobata U3 (bit kukanganisa detector chip VSC8228, chiratidzo jenareta), OLT module (PON SFP), ADC (yakashandiswa neADL5303 uye AD5593), uye DAC (yakashandiswa neMAX4230 uye AD55IC3) bhazi.
3. Iyo bit error detector chip VSC8228 inotumira chiratidzo chemhando yekodhi yakatarwa uye chiyero maererano nemurairo, uye inotyaira iyo OLT module kutumira chiratidzo chemaziso chemhando yekodhi inoenderana uye chiyero kuburikidza neSerDES interface.Iyo yavelength yeOLT yakatumirwa ndeye 1490nm, uye mwenje wakakamurwa kuita masere kuburikidza nekupatsanura.Mushure mekunge iyo DAC inodzora attenuator VOA inonamira kune yakatsanangurwa optical simba, yakabatana neONU optical port.ONU inoverenga simba rekuona rinoenderana uye rinoienzanisa neukoshi chaihwo.
4. DAC yekushandisa nzira: SCM U1 (modhi C8051F340) inotumira data yeDAC kuAD5593 kuburikidza neI2C bhazi, I/O port yeAD5593 inogadzira chiratidzo chemagetsi, uye chiratidzo chemagetsi chinogadzirwa kuburikidza neanoshanda amplifier MAX4230, iyo inoshandiswa kune iyo voltage input pin yeVOA attenuator , kuitira kuti chiedza chinobudiswa nePON OLT module chinodzivirirwa kune yakataurwa optical simba, uye yakabatanidzwa kune optical port yeONU.
5. ADC kushandiswa kwemaitiro: Mushure mokunge chiedza chakabudiswa neONU chaonekwa nePD (photodetector), PD inogadzira magetsi emagetsi ehukuru hwakasiyana maererano nesimba rechiratidzo chemaziso, uye inoshandurwa kuva voltage ine nhamba yakawanda yenhamba. uye kunyatsojeka kuburikidza neiyo logarithmic converter ADL5303.Kukosha kunozivikanwa neAD5593 uye kushandurwa kuita chiratidzo chedhijitari kuburikidza neI2C bhazi kuburikidza neSCM U1 (modhi C8051F340) uye pakupedzisira yakaratidzwa pane inotambira komputa interface.