SPT-P2T13V3-40D Dvukhkanal'nyy 3G-SDI SFP Peredayushchiy Opticheskiy Modul' Tekhnicheskoye Rukovodstvo
Etot rukovodstvo sostavleno na osnove ofitsial'noy spetsifikatsii Sopto SPT-P2T13V3-40D, adresovano inzheneram po apparatnomu obespecheniyu i inzheneram po sistemnoy integratsii, okhvatyvayet polnyy rabochiy protsess printsipov produkta, apparatnoy provodki, otladki vklyucheniya, diagnostiki DDM i ustraneniya neispravnostey.
1 Obzor Produkta
SPT-P2T13V3-40D - eto dvukhkanal'nyy peredayushchiy opticheskiy modul' SFP s interfeysom LC, DFB-lazerom 1310nm, dal'nost'yu peredachi 40km po odnomodovomu voloknu, kommercheskim temperaturnym diapazonom 0~70°C, sootvetstvuyet standartu SMPTE 297-2006, podderzhivayet SD-SDI/HD-SDI/3G-SDI (skorosti peredachi dannykh 50Mbps-2.97Gbps), polnuyu podderzhku patologicheskikh testovykh patternov SDI, vstroyennoye upravleniye MCU i tsifrovuyu diagnostiku DDM, sootvetstvuyet RoHS, odno istochnik pitaniya +3.3V.
Klyuchevoy Moment: Eto modul' - dvukhkanal'nyy peredayushchiy modul' (dvoynoy TOSA) bez priyemnykh kanalov. On dolzhen ispol'zovat'sya v pare s sootvetstvuyushchim priyemnym opticheskim modulem SDI.
Osnovnyye Klyuchevyye Parametry (iz spetsifikatsii)
| Parametr | Spetsifikatsiya |
|---|---|
| Tsentral'naya Dlina Volny | 1260-1360nm, tipichnyy 1310nm DFB |
| Srednyaya Vykhnaya Opticheskaya Moshchnost' | -2 ~ +2dBm (vykhod odnomodovogo volokna SMF) |
| Koeffitsiyent Ekstinktsii ER | >=5dB |
| Otnosheniye Podavleniya Bokovoy Moduly SMSR | >=30dB |
| Istochnik Pitaniya | 3.13-3.47V, tipichnyy 3.3V, maks. 500mA |
| Rabochaya Temperatura Korpusa | 0~+70°C (kommercheskiy klass) |
| Differentsial'noye Vkhodnoye Soprotivleniye | 90-110Ω, vnutrenneye AC-sopryazheniye, zaversheniye 100Ω, vkhod urovnya PECL |
| Maksimal'naya Chastota I2C | 280KHz, logicheskiy uroven' LVCMOS |
| Tochnost' DDM | Temperatura ±3°C; Napryazheniye ±3%; Tok Smeshcheniya ±10%; Opticheskaya Moshchnost' TX ±3dB |
2 Vyvody Apparatury i Rukovodstvo po Proektirovaniyu Skhem
Modul' imeyet 20-kontaktnyy raz'yom SFP s zolotymi kontaktami s dvumya nezavisimymi peredayushchimi kanalami TX1 i TX2. Kanaly polnost'yu nezavisimy i ne meshayut drug drugu.
Opisaniye Klyuchevykh Signal'nykh Vyvodov
| Vyvod | Signal | Opisaniye Funktsii |
|---|---|---|
| 18, 19 | TD1+ / TD1- | Vkhod differentsial'nykh dannykh SDI Kanala 1, vnutrenneye AC-sopryazheniye, zaversheniye 100Ω, differentsial'nyy vkhod PECL 400~1800mV |
| 8, 9 | TD2+ / TD2- | Vkhod differentsial'nykh dannykh SDI Kanala 2 |
| 20 | TX1_DIS | Vkhod otklyucheniya peredachi Kanala 1, podtyazhka vnutri modulya; 2.0V~Vcc: lazer vyklyuchen; 0-0.8V: peredacha vklyuchena; plavayushchiy = vyklyuchen |
| 10 | TX2_DIS | Vkhod otklyucheniya peredachi Kanala 2 |
| 2 | TX1_FAULT | Indikatsiya neispravnosti Kanala 1 (vykhod s otkrytym kollektorom), storona khozyaina dolzhna imet' podtyazhku 4.7-10K; nizkiy = normal'no, vysokiy = neispravnost' lazera |
| 12 | TX2_FAULT | Indikatsiya neispravnosti Kanala 2 |
| 5 | I2C_CLK(SCL) | Chasy upravleniya, khozyain podtyazhka 4.7-10K k VCC_TX |
| 6 | I2C_DATA(SDA) | Dannyye upravleniya, khozyain podtyazhka 4.7-10K k VCC_TX |
| 15/16 | VCC_TX1/VCC_TX2 | Dvukhkanal'nyy istochnik pitaniya peredachi 3.3V |
| 1/4/7/11/14/17 | VEE_TX | Zemlya modulya |
Obyazatel'nyye Trebovaniya k Proektirovaniyu PCB Khozyaina
- Vyvod neispravnosti TX_FAULT: Vykhod s otkrytym kollektorom, materinskaya plata dolzhna dobavit' rezistor podtyazhki 4.7k-10kΩ k 2.0V~Vcc, ne dolzhen byt' ostavlen plavayushchim; nizkiy uroven' 0-0.8V oznachayet normal'nuyu rabotu, vysokiy uroven' oznachayet neispravnost' lazera.
- Vyvod TX_DIS: Modul' imeyet vnutrennyuyu podtyazhku, khozyain vydayet 0-0.8V dlya vklyucheniya lazera; >2V dlya otklyucheniya lazera; plavayushchiy po umolchaniyu otklyuchayet lazer.
- Shina I2C SCL/SDA: Materinskaya plata dolzhna dobavit' rezistory podtyazhki 4.7-10K, napryazheniye podtyazhki ispol'zuyet istochnik modulya 3.3V, chastota chasov I2C <=280KHz, logicheskiy nizkiy 0-0.8V, vysokiy 2.0-3.3V, 0.8-2.0V - neopredelennaya oblast'.
- Trassy differentsial'nogo vkhoda SDI TDx+/TDx- dolzhny stogo kontrolirovat' differentsial'noye soprotivleniye k differentsial'nomu soprotivleniyu 100Ω, trassy dolzhny byt' kak mozhno korochye, minimizirovat' perekhody, izbegat' preryvaniy soprotivleniya, kotoryye vyzyvayut chrezmernyye drozhaniya; modul' uzhe imeyet vnutrenneye AC-sopryazheniye, ne dobavlyayte kondensatory blokirovki postoyannogo toka na storone materinskoy platy.
- Upravleniye pul'satsiyami istochnika pitaniya: pul'satsii istochnika 3.3V dolzhny byt' meneye 50mV, maksimal'nyy tok modulya 500mA, tsep' istochnika pitaniya dolzhna imet' nadlezhashchuyu ploskost' zemli.
3 Vremennyye Parametry i Posledovatel'nost' Vklyucheniya
Vse vremennyye ssylki iz original'noy spetsifikatsii. Logika vklyucheniya programmnogo obespecheniya khozyaina dolzhna sledovat':
- Vklyucheniye modulya, ozhidaniye vremeni initsializatsii
t_init <=300ms, ozhidaniye zaversheniya initsializatsii vnutrennego MCU, prezhde chem razreshit' operatsii chteniya/zapisi I2C; - Dlya vklyucheniya kanala peredachi: potyanut' TX_DIZ nizko k 0-0.8V; vremya vklyucheniya peredachi
t_on <=1ms; - Dlya otklyucheniya kanala peredachi: potyanut' TX_DIZ vysokoye > 2V, vremya otklyucheniya
t_off <=10us; - Posle vosstanovleniya ot neispravnosti: potyanut' TX_DIZ vysokoye kak minimum
10us(t_reset), zatem potyanut' nizko dlya zaversheniya sbrosa neispravnosti; - Vremya otveta soobshcheniya o neispravnosti TX_FAULT
t_fault <=100us.
⚠️ NE chtat'/pisat' I2C srazu posle vklyucheniya modulya. Neobkhodimo ozhidat' 300ms dlya initsializatsii, inache chteniye I2C zaveritsya oshibkoy.
4 Chteniye Tsifrovoy Diagnostiki DDM (I2C)
Modul' podderzhivayet tsifrovuyu diagnostiku DDM SFF-8472.
Primechaniye: 0xA0 i 0xA2 - eto promyshlennyye standartnyye adresa I2C SFF-8472, ne ukazannyye yavno v original'nom dokumente spetsifikatsii.
- 0xA0: Informatsiya ob ID produkta tol'ko dlya chteniya (model', proizvoditel')
- 0xA2: Dannyye monitoringa v real'nom vremeni DDM, chteniye: temperatura modulya, napryazheniye pitaniya, tok smeshcheniya lazera, vykhodnaya opticheskaya moshchnost' TX.
Dostupnyye Elementy Monitoringa
| Element Monitoringa | Diapazon Izmereniya | Tochnost' |
|---|---|---|
| Temperatura Korpusa Modulya | 0~70°C | ±3°C |
| Napryazheniye Pitaniya | 3.0-3.6V | ±3% |
| Tok Smeshcheniya Lazera | 0-100mA | ±10% |
| Vykhodnaya Opticheskaya Moshchnost' TX | -2~+2dBm | ±3dB |
Primechaniye: Eto modul' peredatchika i ne imeyet monitoringa priyemnoy opticheskoy moshchnosti. Chastota chteniya I2C ne dolzhna prevyshat' 280KHz.
5 Ustanovka, Opticheskaya Liniya i Rukovodstvo po Testirovaniyu
- Zashchita ot ESD: Nosit' antistaticheskiy braslet pri vstavke/izvlechenii modulya. Ne kasat'sya zolotykh kontaktov ili kontsov opticheskogo porta golymi rukami. Eto lazernyy produkt Klassa 1. Nikogda ne smotrite pryamo na vykhod opticheskogo porta.
- Volokno: Neobkhodimo ispol'zovat' odnomodovyy dupleksnyy volokonno-opticheskiy patch-kord LC OS2. Dlya liniy 40km neobkhodimo rasschitat' poteri volokna; vykhodnaya moshchnost' modulya -2~+2dBm, i priyemnaya opticheskaya moshchnost' dolzhna popadat' v okno chuvstvitel'nosti priyemnykh moduley.
- Testirovaniye signala: Testirovaniye signala SDI trebuyet monitora videovolny dlya testirovaniya spetsifikatsiy drozhaniya;
- Maksimal'noye dopustimoye obshcheye drozhaniye 3G-SDI (patologicheskiy pattern) 120ps; patologicheskiy pattern HD-SDI 115ps; patologicheskiy pattern SD-SDI 300ps, spetsifikatsii iz spetsifikatsii.
- Modul' podderzhivayet testirovaniye patologicheskikh patternov SDI, chto yavlyayetsya vazhnoy spetsifikatsiyey dlya veshchatel'nykh moduley SDI. Mozhno ispol'zovat' generator signalov SDI dlya vyvoda patologicheskikh patternov dlya proverka stabil'nosti linii.
6 Kontrol'nyy Spisok Ustraneniya Rasprostranennykh Neispravnostey
| Simptom Neispravnosti | Napravleniye Ustraneniya Neispravnostey |
|---|---|
| Lazer ne izluchayet svet | 1) TX_DIZ potyanut vysokiy ili plavayushchiy? 2) Ozhidalas' li initsializatsiya t_init posle vklyucheniya? 3) Istochnik pitaniya VCC 3.13-3.47V? 4) Proverit' sostoyaniye vyvoda TX_Fault na indikatsiyu neispravnosti |
| TX_FAULT postoyanno vysokiy (neispravnost') | 1) Anomal'noye napryazheniye pitaniya; 2) Vnutrennyaya neispravnost' lazera; 3) Podtverdit', chto rezistor podtyazhki materinskoy platy pripayan; 4) Vypolnit' protseduru sbrosa TX_DIS |
| I2C ne mozhet byt' prochitan | 1) Podtverdit' rezistory podtyazhki SCL/SDA; 2) Chastota I2C <=280KHz; 3) Ozhidat' >=300ms posle vklyucheniya; 4) Proverit', sootvetstvuyut li logicheskiye urovni LVCMOS; proverit', ne zablokirovana li shina |
| Mertseniye izobrazheniya SDI, shum | 1) Differentsial'noye vkhodnoye soprotivleniye 100Ω? 2) Differentsial'naya vkhodnaya amplituda 400-1800mV? 3) Proverit' spetsifikatsii drozhaniya, podtverdit' kachestvo vykhoda istochnika signala; 4) Chrezmernyye pul'satsii istochnika pitaniya |
| Anomal'nyye dannyye chteniya DDM | Podtverdit', chto ispol'zuyetsya vnutrenniy/vneshniy rezhim kalibrovki, proverit' adres registra chteniya 0xA2, podtverdit', chto svyaz' I2C stabil'na |
7 Mekhanicheskiye Razmery
Standartnyy paket SFP-MSA, obshchiye razmery 57x13.4x8.5mm; dvoynyye opticheskiye porty LC, lateral'noye rasstoyaniye dvukh TOSA 6.25±0.05mm; zolotyye kontakty - standart SFP-MSA 20-kontaktnyy, fizicheski sovmestim s kletkami SFP/SFP+. Eto modul' tol'ko dlya peredachi video SDI i ne podderzhivayet protokoly vysokoskorostnykh dannykh SFP+.
Primechaniye: Yesli vam nuzhny dopolnitel'nyye uslugi po nstroyke, svyazhites' s nami.
Elektronnaya pochta: info@sopto.com.cn
Veb-sayt: http://www.sopto.com.cn
