Optical fiber transceivers play an important role in the networking of industrial transmission systems. With the rapid development of the industrial communication field, the supply and demand for optical fiber transceivers has also increased. Next, let's talk about the common faults and detection methods of fiber optic transceiver:
1. Check whether the indicator light of the optical fiber transceiver or optical module and the indicator light of the twisted pair port are on.
(1) If the optical port (FX) indicator of the optical fiber transceiver is not on, please confirm whether the optical fiber link is cross-linked. One end of the fiber jumper is connected in parallel; the other end is connected in a cross way.
(2) If the optical port (FX) indicator of the A transceiver is on, and the optical port (FX) indicator of the B transceiver is not on, the fault is on the A transceiver side: one possibility is: the A transceiver (TX) light The sending port is broken, because the optical port (RX) of the B transceiver cannot receive the optical signal; another possibility is: the optical fiber link of the optical sending port of the A transceiver (TX) has a problem (optical cable or optical jumper) may be broken).
(3) The twisted pair (TP) indicator light does not light up, please confirm whether the twisted pair cable is connected incorrectly or is connected incorrectly? Please use a continuity tester to test (but the twisted pair indicator light of some fiber optic transceivers must wait Lights only after the fiber link is connected).
(4) Some transceivers have two RJ45 ports: (To HUB) indicates that the connection line connecting the switch is a straight-through line; (To Node) indicates that the connection line connecting the switch is a crossover line.
(5) There are MPR switches on the side of some fiber optic transmitters: it means that the connecting line connecting the switch is a straight line; DTE switch: the connecting line connecting the switch is a cross line.
2. Whether the optical cable and optical fiber jumper are broken
(1) Optical cable on-off detection: use a laser flashlight, sunlight, or illuminator to illuminate one end of the optical cable connector or coupler; see if there is visible light at the other end, if there is visible light, it means that the optical cable is not broken.
(2) Optical fiber connection on-off detection: use a laser flashlight, sunlight, etc. to illuminate one end of the optical fiber jumper; see if there is visible light at the other end, if there is visible light, it indicates that the optical fiber jumper is not broken.
3. Whether the half/full duplex mode is wrong
Some fiber optic transceivers have FDX switches on the side: full duplex; HDX switches: half duplex.
4. Detect with an optical power meter
Luminous power of optical fiber transceiver or optical module under normal conditions: multimode: between -10db and 18db; single mode 20km: between -8db and 15db; single mode 60km: between -5db and 12db ; If the luminous power of the fiber optic transceiver is between: -30db - 45db, then it can be judged that there is a problem with the fiber optic transceiver.
