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By PURPLELEC | 08 January 2024 | 0 Comments

HDMI Optical Transceiver Frequently Asked Questions

  Problem 1: The power indicator light does not light up after powering on
  Possible reasons: ① The power supply is bad ② The 5V in the HDMI optical transceiver is short-circuited or the power supply is partially disconnected.
  Solution: Use a fault-free power supply to supply power. If it still does not work, contact our technicians and return the machine to the factory for repair.
  Tip: For optical transceivers powered by 5V, once a power supply higher than 5V is inserted, the fuse in the HDMI optical transceiver will be short-circuited to ground immediately to protect the circuit. Once the fuse is broken down, it cannot be restored and can only be returned to the factory for replacement. Try to use standard With power supply.
  Problem 2: No video output on all channels
  Processing steps: ① Check whether the power supply of the HDMI optical transceiver is normal. If it is not normal, refer to step 1 to troubleshoot; if it is normal, go to step two. ② Test whether the camera output signal is normal. If normal, go to step three. ③ Connect the camera signal to the optical transmitter correctly and check whether the video channel indicator light is lit. If it is not lit, the transmitter may be faulty, contact our technical staff; if it is lit normally, go to step four. ④Test the optical power of the transmitter. The emitted light power is abnormal, the transmitter may be faulty, please contact our technical staff; if the power is normal, go to step five. ⑤Test the optical fiber link loss. The link loss is normal. Go to step six. ⑥ Connect the optical cable to the optical receiver correctly, and check whether the optical fiber indicator light (Link/Optic light) and video channel light of the receiver are lit. If it is not lit normally, the receiver may appear. Contact our technical staff; if it is lit normally, go to step seven. ⑦ Test whether the display device and video connection cable are normal. If normal, go to step eight. ⑧Connect the display device and the optical receiver correctly. If there is no video display, the receiver may be faulty. Please contact our technical personnel.
  Problem 3: Snowflake spots appear in all channel images
  Possible reasons: ① The optical power of the transmitter is low. Solution: Test the optical power of the transmitter. If the power does not meet the standard, contact our technical staff. ② The optical loss of the optical fiber link exceeds the standard. Solution: test the link loss. ③The sensitivity of the receiver is low. Solution: Test the sensitivity of the receiver. If the sensitivity is not up to standard, contact the salesperson.
  Problem 4: Image jitter, ripple, and interference in all channels
  Possible reasons: ① The power supply on site is unstable or there is strong magnetic interference nearby. Solution: Change the site for testing. ②Power supply failure, solution: replace the power supply. ③The optical loss is too large.
  Problem 5: All channel images are white
  Possible reasons: peripheral impedance mismatch
  Solution: The camera signal directly enters the optical transmitter. After optical transmission, the video signal recovered by the receiver directly enters the monitor, bypassing other external equipment for testing. If it is normal, find the cause of the peripheral; if it is abnormal, contact the salesperson.
  Question 6: Some channels have no image or the image is abnormal
  Solution: Move the camera and monitor video lines corresponding to any non-faulty channel to the port corresponding to the faulty channel. If the image is displayed normally, check the external device corresponding to the faulty channel; if the image still cannot be displayed normally, shake the BNC heads of the transmitter and receiver respectively to test whether the fault is caused by poor contact of the BNC heads. If it is caused by the BNC head, use needle nose pliers to clamp the copper core inside the BNC and test again.

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