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LITLHALOSO
Li-transceiver tsa SFP ke li-module tse sebetsang hantle haholo, tse theko e tlaase tse tšehetsang sekhahla sa data sa 1.25Gbps le sebaka sa phetiso ea 10KM ka SMF.
Transceiver e na le likarolo tse tharo: transmitter ea laser ea FP, photodiode ea PIN e kopantsoeng le trans-impedance preamplifier (TIA) le yuniti ea taolo ea MCU. Li-module tsohle li fihlela litlhoko tsa polokeho ea laser ea sehlopha sa I.
Li-transceiver li tsamaisana le SFP Multi-Source Agreement (MSA) le SFF-8472. Bakeng sa tlhaiso-leseling e batsi, ka kopo sheba SFP MSA.
Mojule Boloko Setšoantšo
Ho odara Tlhahisoleseding
| Karolo Tjhe. | Lintlha Sekhahla (sa optical) | Lesetara | Faeba Mofuta | Sebaka | Optical Sebopeho | Mocheso | DDMI | Latch 'Mala |
| SFP-GE-LX | 1.25Gbps | FP | SMF | 10KM | LC | 0~70℃ | Y | Putsoa |
| SFP-GE-LX-E | 1.25Gbps | FP | SMF | 10KM | LC | -20~85℃ | Y | Putsoa |
| SFP-GE-LX-I | 1.25Gbps | FP | SMF | 10KM | LC | -40~85℃ | Y | Putsoa |
E feletse Boholo Litlhahlobo
| Paramethara | Letšoao | Bonyane | Mofuta | Boholo | Yuniti | Ref. |
| Phepelo ea Phepelo e Phahameng ka ho Fetisisa | Vcc | -0.5 | 3.6 | V | ||
| Mocheso oa Polokelo | TS | -40 | 85 | °C | ||
| Mongobo o Lekanyelitsoeng - O sebetsang | RHO | 5 | 85 | % | ||
| Mongobo o Lekanyelitsoeng - Polokelo | RHS | 5 | 95 | % |
E khothaletsoa Ho sebetsa Maemo
| Paramethara | Letšoao | Bonyane. | E tloaelehileng | Boholo. | Yuniti | Lintlha |
| Mocheso o sebetsang oa nyeoe | Holimo | 0 | - | 70 | ℃ | Khoebo |
| -40 | 85 | Indasteri | ||||
| Phepelo ea Motlakase ea Phepelo ea Matla | VCC | 3.13 | 3.3 | 3.47 | V | |
| Sebaka sa phetisetso | TD | - | - | 10 | km | Ho feta SMF |
Motlakase Litšobotsi
| Paramethara | Letšoao | Bonyane | Mofuta | Boholo | Yuniti | Ref. |
| Phepelo ea Motlakase | Vcc | 3.15 | 3.3 | 3.6 | V | |
| Phepelo ea Hona Joale | Icc | 303 | mA | |||
| Sefetoleli | ||||||
| Impedance ea phapang ea ho kenya | Rin | 100 | Ω | 1 | ||
| Ho fetoha ha data e fellang ka motsotsoana | Vin, maq. | 250 | 1200 | mV | ||
| Fetisetsa ho tima motlakase | VD | Vcc–1.3 | Vcc | V | ||
| Fetisetsa Kgontsha Motlakase | VEN | Vee | Vee+ 0.8 | V | 2 | |
| Fetisetsa Nako ea ho Thibela ho Tiisa | 10 | us | ||||
| Moamoheli | ||||||
| phetoho ea tlhahiso ea data e felileng e le 'ngoe | Vout,pp | 250 | 800 | mV | 3 | |
| Nako ea ho phahama ha tlhahiso ea data | tr | 100 | 175 | ps | 4 | |
| Nako ea hoetla ea tlhahiso ea data | tf | 100 | 175 | ps | 4 | |
| Phoso ea Los | Phoso ea VLOS | Vcc–0.5 | VccHOST | V | 5 | |
| LOS e Tloaelehileng | Tloaelo ea VLOS | Vee | Vee+0.5 | V | 5 | |
| Ho Hana Phepelo ea Motlakase | PSR | 100 | mVpp | 6 | ||
Lintlha:
1. E hokahantsoe ka ho toba le li-pin tsa ho kenya data tsa TX. AC e kopantsoe ka mor'a moo.
2. Kapa potoloho e bulehileng.
3. Ho kena ho 100 ohms phapang e felisoang.
4. 20 – 80%
5. Tahlehelo ea Letšoao ke LVTTL. Logic 0 e bontša ts'ebetso e tloaelehileng; logic 1 e bontša hore ha ho na lets'oao le fumanoeng.
6. Kutloisiso ea moamoheli e latela phetoho ea sinusoidal ea phepelo ea motlakase ea 20 Hz ho isa ho 1.5 MHz ho fihlela boleng bo boletsoeng bo sebelisoang ka marang-rang a khothaletsoang a ho sefa phepelo ea motlakase.
Optical le Litšobotsi
| Paramethara | Letšoao | Bonyane | Mofuta | Boholo | Yuniti | Ref. |
| Sefetoleli | ||||||
| Tlhahiso ea Pwr (Bofelo ba Bophelo) | POUT | -9.0 | -3.0 | dBm | 1 | |
| Bolelele ba Maqhubu a Optical | λ | 1270 | 1310 | 1355 | nm | |
| Ho itšetleha ka mocheso oa bolelele ba maqhubu | 0.08 | 0.125 | nm/°C | |||
| Bophara ba Spectral (-20dB) | σ | 3.5 | nm | |||
| Karolelano ea ho Fela ha Optical | ER | 10 | dB | |||
| Karolelano ea khatello ea Sidemode | SSRmin | 30 | dB | |||
| Nako ea ho Phahama/Hoetla ea Optical | tr/ tf | 100 | 160 | ps | ||
| RIN | RIN | -120 | dB/Hz | |||
| Phetisetso ea ho thothomela (tlhōrō ho ea ho tlhōrō) | 100 | ps | ||||
| Moamoheli | ||||||
| Karolelano ea Kutlo ea Rx @ Gigabit Ethernet | RSENS3 | -20 | dBm | 2 | ||
| Matla a ho Kena a Phahameng ka ho Fetisisa | PMAX | -3.0 | dBm | |||
| Bolelele ba Maqhubu a Setsi sa Optical | λC | 1260 | 1310 | 1620 | nm | |
| LOS De -Assert | LOSD | -22 | dBm | |||
| LOS Assert | LOSA | -40 | dBm | |||
| LOS Hysteresis | 1.0 | dB | ||||
| Mohlahisoa oa Jitter oa Receiver @1.25Gbps | 160 | ps | 3 | |||
Lintlha:
1. Polokeho ea Laser ea Sehlopha sa 1 ho latela melaoana ea FDA/CDRH le IEC-825-1.
2. Ka karolelano ea ho fela ha lisele tse shoeleng. E lekantsoe ka mohlala oa teko ea @PRBS=2^7-1 NRZ, @1.25Gb/s, BER<10-12.
3. Jitter e ekelitsoe ke moamoheli (tlhōrō ho ea ho tlhōrō). E lekantsoe ka –18.0dBm karolelano ea kutloisiso ea Rx, @PRBS=2^7-1 paterone ea teko ea NRZ.
Dijithale Tlhahlobo
| Paramethara | Sebaka | Ho nepahala | Yuniti | Tekanyo |
| Thempereichara | -40 ho isa ho 85 | ±3 | ºC | Kahare |
| Palo ea li-volts | 0 ho ea ho Vcc | ± 3% | V | Kahare |
| Tekanyetso ea Tx ea Hona Joale | 0 ho isa ho 100 | ± 10% | mA | Kahare |
| Matla a ho Hlahisa Tx | -9 ho isa ho -3 | ±3 | dB | Kahare |
| Matla a ho Kena a Rx | -20 ho isa ho -3 | ±3 | dB | Kahare |
Phini Setšoantšo
Phini Litlhaloso
| Phini | Letšoao | Lebitso/Tlhaloso | Ref. |
| 1 | V EET | Sebaka sa ho Fetisa (Se Tloaelehileng le Sebaka sa ho Amohela) | 1 |
| 2 | T MOLATO | Phoso ea Mofetoleli. | 2 |
| 3 | T DIS | Ho tima phetisetso. Tlhahiso ea laser e emisitsoe ha e le holimo kapa e butsoe. | 3 |
| 4 | MOD_DEF(2) | Tlhaloso ea Mojule 2. Mohala oa data bakeng sa ID ea Serial. | 4 |
| 5 | MOD_DEF(1) | Tlhaloso ea Mojule 1. Mohala oa oache bakeng sa ID ea Serial. | 4 |
| 6 | MOD_DEF(0) | Tlhaloso ea Mojule 0. E thehiloe ka har'a mojule. | 4 |
| 7 | Khetho ea Litefiso | Ha ho hlokahale khokahano | |
| 8 | LAS | Tahlehelo ea pontšo ea Letšoao. Logic 0 e bontša ts'ebetso e tloaelehileng. | 5 |
| 9 | V EER | Sebaka sa Moamoheli (Se Tloaelehileng le Sebaka sa Mofetoleli) | 1 |
| 10 | V EER | Sebaka sa Moamoheli (Se Tloaelehileng le Sebaka sa Mofetoleli) | 1 |
| 11 | V EER | Sebaka sa Moamoheli (Se Tloaelehileng le Sebaka sa Mofetoleli) | 1 |
| 12 | RD- | Seamoheli se fetoletsoeng DATA kantle. AC e kopantsoe | |
| 13 | RD+ | Seamoheli DATA e sa fetoleloang e ntšitsoe. AC e kopantsoe | |
| 14 | V EER | Sebaka sa Moamoheli (Se Tloaelehileng le Sebaka sa Mofetoleli) | 1 |
| 15 | V CCR | Phepelo ea Matla a Moamoheli | |
| 16 | V CCT | Phepelo ea Matla a Fetisang | |
| 17 | V EET | Sebaka sa ho Fetisa (Se Tloaelehileng le Sebaka sa ho Amohela) | 1 |
| 18 | TD+ | DATA e sa fetolehang ea phetisetso ka hare ho. AC e kopantsoe. | |
| 19 | TD- | Transmitter Inverted DATA in. AC e kopantsoe. | |
| 20 | V EET | Sebaka sa ho Fetisa (Se Tloaelehileng le Sebaka sa ho Amohela) | 1 |
Lintlha:
1. Sebaka sa potoloho se arotsoe ka hare ho tloha fatše la chassis.
2. T
MOLATO
ke sesebelisoa se bulehileng sa ho bokella/ho ntsha metsi, seo se lokelang ho huloa ka resistor ea 4.7k - 10k Ohms botong ea moamoheli haeba se reretsoe ho sebelisoa.
Motlakase oa ho hula o lokela ho ba pakeng tsa 2.0V ho ea ho Vcc + 0.3V. Tlhahiso e phahameng e bontša phoso ea phetisetso e bakoang ke hona joale ea TX bias kapa matla a tlhahiso ea TX a fetang meeli ea alamo e seng e behiloe. Tlhahiso e tlase e bontša ts'ebetso e tloaelehileng. Boemong bo tlase, tlhahiso e huleloa ho
<0.8V.
3. Tlhahiso ea laser e emisitsoe ho TDIS
>2.0V kapa e butsoe, e buletsoe ho TDIS
<0.8V.
4. E lokela ho hulwa ka 4.7k - 10kohms botong ya moamoheli ho fihlela motlakaseng o pakeng tsa 2.0V le 3.6V. MOD_DEF(0) e hula mola o tlase ho bontsha hore module e hoketswe.
5. LOS ke tlhahiso e bulehileng ea pokello. E lokela ho huloa ka 4.7k - 10 kohms boto ea moamoheli ho fihlela motlakaseng o pakeng tsa 2.0V le 3.6V. Logic 0 e bontša ts'ebetso e tloaelehileng; logic 1 e bontša tahlehelo ea lets'oao.
E khothaletsoa Sebopeho Potoloho
