1. Inkqubo yokugunyaziswa kwe-BOB:
1. Inkqubo yokugunyaziswa kwe-BOB ye-HDV Phoelectron Technology LTD:
Ubukhulu becala kukulungisa i-optical power kunye ne-eye map extinction ratio yesiphelo sothumelo, kwaye umamkeli kufuneka alungelelanise ubuntununtunu kunye nokubeka iliso kwe-RSSI.
Isalathisi sokugunyaziswa kwe-BOB:
| uvavanyo | ipharamitha | iinkcukacha | iyunithi | izimvo | |||
| umsebenzi | uphawu | inkcazelo | Min. | Chwetheza. | Max | ||
| Debugging inxalenye | TxPower | Tx ukuthumela amandla | 1.2 | 1.5 | 1.8 | dBm | Ngomlinganiselo othile, isalathisi sinokulungiswa ngokuhambelana nokusebenza kwe-BOSA |
| I-ExtRatio | umlinganiselo wokuphela | 9.5 | 12 | 14 | dB | ||
| Umnqamlezo wamehlo | isiphambuka somzobo weliso | 45 | 50 | 55 | ％ | ||
| RxPoCalPoint_0 | Ulungelelwaniso lwe-Rx yimeko yokuqala yepharamitha | -10 | -10 | -10 | dB | ||
| RxPoCalPoint_1 | Rx ukulinganisa imeko yeparameter yesibini | -20 | -20 | -20 | dB | ||
| RxPoCalPoint_2 | Ulungelelwaniso lwe-Rx yimeko yeparameter yesithathu | -30 | -30 | -30 | dB | ||
| Inxalenye yovavanyo | TxPower | Tx ukuthumela amandla | 0.5 | 2.5 | 4 | dBm | Ngomlinganiselo othile, isalathisi sinokulungiswa ngokuhambelana nokusebenza kwe-BOSA |
| TxPo_DDM | Ukudlulisa esweni amandla optical | 0.5 | 2.5 | 4 | dB | ||
| DiffTxPower | Ukudlulisa esweni umahluko wamandla okukhanya | -1 | 0 | 1 | ％ | ||
| I-ExtRatio | I-Emission extinction ratio | 9 | 11 | 14 | dB | Ngomlinganiselo othile, isalathisi sinokulungiswa ngokuhambelana nokusebenza kwe-BOSA | |
| Umnqamlezo wamehlo | isiphambuka somzobo weliso | 45 | 50 | 55 | dB | ||
| I-EyeMargin | Umzobo wamehlo uMagin | 10 | 10 | 10 | dB | ||
| TxCurrent | ukukhutshwa kwangoku | 180 | |||||
| IyonkeYangoku | yangoku iyonke | 100 | 250 | 300 | |||
| Uvakalelo | ubuntununtunu | -27 | -27 | ||||
2. Idiagram yoqhagamshelo lwe-BOB ye-HDV Phoelectron Technology LTD.:
Umzobo oqhelekileyo wokuvavanya i-BOB, uvavanyo lwendlela enye, uxhulumaniso lwangaphandle oluyinkimbinkimbi, i-attenuator, imitha yephutha, imitha yamandla, i-CDR kunye nezinye izixhobo kufuneka zithengwe ngokwahlukileyo. Indawo nganye yokusebenzela ifuna ikhompyutha ukuxhasa uvavanyo.
1. Ukuqaliswa kwe-ES-BOBT8 izixhobo zovavanyo lwe-BOB:
2. Unokuxhasa ukuya kuthi ga kwi-8 iziteshi zovavanyo lwe-BOB, imitha yamandla edibeneyo yangaphakathi kunye ne-attenuator, inokugqiba ukuthumela kunye nokufumana ukulungiswa kunye nokuvavanya ngexesha elifanayo;
3. Umsebenzi odibeneyo we-BERT kunye ne-2xSFP + i-interface yomthombo wokukhanya, unokuxhasa i-1.25G ~ 10G imveliso yesignali ye-optical, ukubonelela ngomthombo wokukhanya wesignali yokuvavanya ukuvalelwa kwe-BOB;
4. I-CDR edibeneyo I-Trigger ngaphandle, ukubuyiswa kwesignali yewashi eyakhelwe ngaphakathi ngaphakathi, inokubonelela ngesignali yewashi efunekayo kuvavanyo lwe-optical eye diagram;
5. Imitha yokulinganisa amandla okuzimela ngokwawo inokubonelela ngomgangatho wokubona ulungelelwaniso lwamandla ombane.
Inkqubo yovavanyo ye-ES-BOBT8 ye-BOB ibonelela ngeseti epheleleyo yezisombululo zezixhobo zovavanyo, ezinokubonelela ngobuninzi beendlela ezisi-8I-ONUUvavanyo lwe-BOB. Umhloli we-BER kunye nomthombo wokukhanya, i-attenuator, imitha yamandla, i-wavelength division, i-optical switch kunye nezinye izixhobo zihlanganiswe kwisixhobo esinye, kunye ne-software ye-BOB yokuhlola i-automation software, inokubonelela ngesethi epheleleyo yezisombululo zovavanyo lwe-BOB.
2Umgaqo wokusebenza kweHardware:
Indima ye-ES-BOBT8 yothotho lweenkqubo ze-BOB zehardware:
1.Kwinkqubo yemveliso, khangela ukuba iI-ONUoptical port amandla akhanyayo aqhelekile ngexesha lokwenyani
2.Jonga ukuba ixabiso lamandla okukhanya elifunyenweyo lifundwe yiI-ONUizibuko elibonakalayo lichanekile.
Umgaqo osebenzayo wenkqubo yehardware:
1. Isoftware yekhompyuter ephezulu kwinkqubo yokusebenza iqhagamshelwe kwi-interface ye-USB ye-SCM U1 (imodeli C8051F340) nge-interface ye-USB kwinkqubo yokuvavanya ukuqonda ukudityaniswa komatshini womntu;
2. I-SCM U1 (imodeli C8051F340) ilawula i-U3 (i-bit error detector chip VSC8228, i-signal generator), imodyuli ye-OLT (PON SFP), i-ADC (iphunyezwe yi-ADL5303 kunye ne-AD5593), kunye ne-DAC (iphunyezwe ngu-MAX4230 kunye ne-AD55IC3) ibhasi.
3. I-bit error detector chip VSC8228 ithumela isignali yodidi oluchaziweyo lwekhowudi kunye nereyithi ngokuhambelana nomyalelo, kwaye iqhuba imodyuli ye-OLT ukuthumela isignali ye-optical yohlobo lwekhowudi ehambelanayo kunye nereyithi ngokusebenzisa i-SerDES interface. Ubude be-OLT ethunyelwe ngaphandle yi-1490nm, kwaye ukukhanya kwahlulahlulwe kwisibhozo nge-splitter. Emva kokuba i-DAC yokulawula i-VOA igxininise kumandla okukhanya achaziweyo, ixhunyiweI-ONUizibuko elibonakalayo.I-ONUifunda amandla abonakalayo ahambelanayo kwaye ayithelekise nexabiso lokwenyani.
4. Indlela yokuphunyezwa kweDAC: I-SCM U1 (imodeli C8051F340) ithumela idatha yeDAC kwi-AD5593 ngebhasi ye-I2C, i-port ye-I/O ye-AD5593 ivelisa umqondiso wombane, kwaye umqondiso wombane uveliswa nge-amplifier yokusebenza MAX4230, esetyenziswa kwi- I-pini yegalelo lombane we-VOA attenuator, ukuze ukukhanya okukhutshwe yi-PON OLT imodyuli ikhusiswe kumandla optical akhankanyiweyo, kwaye emva koko iqhagamshelwe kwizibuko le optical yeI-ONU.
5. Indlela yokuphunyezwa kwe-ADC: Emva kokukhanya okukhutshwe yi-I-ONUifunyenwe yi-PD (i-photodetector), i-PD ivelisa i-currents yesignali yobukhulu obuhlukeneyo ngokwamandla esignali ye-optical, kwaye iguqulwa ibe yi-voltage kunye noluhlu olubanzi lwamanani kunye nokuchaneka okuphezulu ngokusebenzisa i-logarithmic converter ADL5303. Ixabiso liqatshelwa ngu-AD5593 kwaye liguqulwa libe ngumqondiso wedijithali ngokusebenzisa ibhasi ye-I2C nge-SCM U1 (imodeli ye-C8051F340) kwaye ekugqibeleni iboniswe kwi-interface yekhompyutha yokusingatha.