# Regarding test of optical modules ## 1. Testing for APAC-QSFP28 ### 1.0 Configure control port for optical modules * LPMode = '0' * ModSelL = '1' * ResetL = '1' #### Descript control port in the datasheet[[1]](https://www.fit-foxconn.com/Images/Products/Spec/AFBR-79EEPZ_20160510175053852.pdf): ![](https://i.imgur.com/HZ9gjP9.png) ### 1.1 Now result (on UT4) ![image alt](https://i.imgur.com/0C2B93b.png) #### 1.1.1 The port: ModPrsL ![](https://i.imgur.com/xA33fTd.png) ## 1.2 When I test with VCU108 develop board -- OK ![](https://i.imgur.com/HOIu2gN.png) ## 2. Testing for Liverage-QSFP28 again -- No link, but locked ![](https://i.imgur.com/w9Uijws.png) Result is same as test on UT4. ## 3. Test laser light (image) of opt modules ### 3.1 VCU108 ![](https://i.imgur.com/QpYXlDC.jpg) ![](https://i.imgur.com/bQdgGnR.jpg) ### 3.2 UT4 ![](https://i.imgur.com/jjTGoR9.jpg) ![](https://i.imgur.com/WMCGb8s.jpg) ### 3.3 Liverage opt (VCU108) ![](https://i.imgur.com/lB1f8E7.jpg) ### 3.4 Liverage opt (UT4) ![](https://i.imgur.com/Uc1N1FX.jpg) ![](https://i.imgur.com/5UBdzp2.jpg) ![](https://i.imgur.com/RxuFYcO.jpg) ## 4 GTH-10G Fiber loop-back ![](https://i.imgur.com/0Beagt7.png) ## Reference 1. [Datasheet: Avago-QSFP28](https://www.fit-foxconn.com/Images/Products/Spec/AFBR-79EEPZ_20160510175053852.pdf) 2. [Datasheet: Liverage-QSFP28](https://www.liverage.com.tw/Templates/att/100G_QSFP28_SR4_100m_Datasheet.pdf?lng=en) 3. [Datasheet: APAC-QSFP28](https://www.apacoe.com.tw/files/LM2C-L3S-TC-N-L%20V1.2.pdf)