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2. Connect the fiber jumper. Pay attention to the direction of the bayonet when connecting.
3, connection business interface, data, audio and other business interface connection Note that the specific model instructions.
4, it is recommended to do a good job of power supply voltage regulator and grounding, connect all kinds of interfaces and check whether the power supply meets the requirements before they can supply power to the optical transceiver.
5. After the devices at both ends are finished with steps 1, 2, 3, and 4 above, check whether the link indicator (SYNC) is on.
6. Check whether the function of video and data is normal under the normal state of the link indicator. .
Follow the steps above to operate the device that does not work as follows:
Second, the link troubleshooting 1, check the actual transmission distance and the set of equipment is consistent, if not consistent with the salesperson.
2. Preparation materials: optical power meter, jumper, flange, anhydrous alcohol, alcohol cotton.
3. Connect the optical transceiver with a jumper to check if the SYNC indicator is on.
4. After confirming the optical transceiver, install the transmitter and use the optical power meter at the front end to measure the fiber output power of the transmitter [1510nm band]. (The standard fiber output power refers to the following table).
5. Connect the jumper of the front-end transmitter to the center and measure the power of the corresponding fiber in the terminal box.
6. If there is no data to read or read data is less than the reference table, check the connection of each interface flange jumper, wipe the dust off the connector with alcohol cotton, check the quality of the splice and fiber optic cable.
7, according to steps 5,6 still no data read out need to use ODTR equipment to measure whether there is a break.
Third, the video equipment troubleshooting <br> <br> nowhere 1, check link indicator (SYNC) is normal, if not normal link reference troubleshooting.
2. Check if the video indicator of the transmitter is bright. If it is not bright, check whether the camera has output. If there is any other normal working optical transceiver, you can cross the video. If the indicator light is still off, contact the salesman.
3. Check whether the receiver video indicator is on. If the data is off, the data is not controlled. 1. The data code and rate of the matrix or DVR are the same as those of the decoder.
2. Refer to the optical transceiver manual to confirm whether the data interface is correct.
3. Refer to the optical transceiver manual to confirm whether the data wiring is correct. (Note: The data is sent from the receiver to the transmitter).
4. 1-3 steps without error The data is not controlled yet. Use a multimeter to measure the voltage between two data lines. When it is not controlled, it is a constant voltage (according to the different voltage values ​​of the decoder), when the control The voltage between data lines should jump between 0-5V.
PTZ rotation or indiscriminate rotation 1. The reason for PTZ rotation or random rotation is generally caused by the following four reasons:
1 The decoder is damaged.
2 The light attenuation is too large to cause data errors.
3 One data source is connected to too many optical transceivers. The load is too large and the driving force is insufficient.
4 Optical transceiver data is damaged.
Audio failure 1 Make sure the source of the optical transceiver is working properly.
2 Make sure the output voltage of the audio source is within 3V.
3 Check the audio wiring according to the instructions.
4 use a small speaker to connect the audio output to test whether the audio is working correctly. Ethernet is not connected. 1. The optical transceiver is a DTE device. It is connected with the computer and must be reversed. It is connected with the HUB and the switch to press the positive line and reverse line.
2 Check that the IP address of the connected computer is in the same network segment.
3 Use the command c:\>ping IP address -t to check if connectivity is available.
If the electrical signal cannot be received normally, check as follows:
1. Make sure all connections are correct and that cables, optical cables, and power are also OK.
If the optical transceiver power is normal, but it does not work, perform the following steps to perform A. Monitor black screen, data and camera control functions are normal.
1. Remove the optical fiber from the optical port. If the screen is no longer black but there is snow, the optical connection may be good.
2. Make sure the video BNC connection between the optical transceivers is intact.
B. The monitor screen has snowflakes (noise), data and camera control functions are normal. This situation illustrates the problem with the light part. Continue to troubleshoot by following these steps:
1. Remove the fiber from the transmitter's optical port and insert an optical fiber jumper.
2. Insert the other end of the jumper into the optical power meter.
a. If the reading does not match the indicator, there is a problem with the transmitter and it should be replaced.
b. If the reading meets the specification, proceed to the next step.
3. Check the connector. If dirty, wipe it clean with isopropyl alcohol.
4. Connect the original fiber to the transmitter's optical port. At the receiver side, steps 2 to 3 above are performed. The reading of the optical power meter must at least reach the minimum calibration value of the input energy of the receiver.
The general idea of ​​fault location in optical transmission system fault handling is: external and subsequent transmission. In other words, in the fault location, first eliminate the external possible factors, such as fiber breakage, power supply interruption, etc., and then consider the transmission equipment. Therefore, it is very important how to accurately locate the obstacle points.
Optical transceivers generally have an operating status indicator (detailed degree of indicator reflects the design level of the optical transceiver), power supply optical fiber link establishment, signal synchronization, video input and output, and data. Refer to the device manual to determine the fault scope roughly by observing the status of the indicator. Check the video input and data indicator to eliminate the interruption of the input video signal or control signal; check the fiber link indicator to determine whether the fiber link is normal, such as when the fiber or active connector loss is large, the indicator will go out or flash, etc. . When the same type of equipment is used, the replacement inspection method (requiring that the equipment is interchangeable) can be adopted. That is, the optical fiber is connected to a receiver working normally at the other end or the transmitter at the remote end can accurately determine the faulty equipment.
The following briefly describes how to eliminate common faults in the use of optical transceivers:
No video signal 1. Check whether the power of each device is normal.
2. Check whether the corresponding channel video indicator on the receiver is lit.
A: If the indicator light is on (the light indicates that the channel already has a video signal output). Then check whether the video cable between the receiver and the terminal device such as the monitor or DVR is connected properly, and whether the video interface connection is loose or there is a false weld.
B: The video indicator on the receiving end is off. Check whether the corresponding channel video indicator on the front end is on. (It is recommended to re-power the optical receiver to ensure the synchronization of the video signal)
a: The light is on (the light indicates that the video signal collected by the camera has been sent to the front end of the optical transceiver), check whether the optical cable is connected, and whether the optical interface of the optical transceiver and the optical cable terminal box is loose. It is recommended to re-plug the fiber connector once (if the pigtail is dirty, it is recommended to clean it with cotton alcohol before inserting it).
b: The light is off. Check if the camera is working properly and if the video cable from the camera to the front-end transmitter is connected reliably. The video interface is loose or there is a false weld.
If the above method can not eliminate the fault and have the same type of equipment, you can use the replacement inspection method (requires that the equipment is interchangeable), that is, the optical fiber is connected to the receiver at the other end that is working normally or the transmitter at the far end can be accurately judged. Faulty equipment.
Interference snowflakes on the screen are mostly caused by excessive attenuation of fiber links or long-distance video cables due to AC electromagnetic interference.
1: Check if the pigtails are bent excessively (especially when the multi-mode transmission is carried out, the pigtails should be stretched as far as possible so as not to bend too much).
2: Check whether the connection between the optical port and the terminal box flange is reliable and whether the flange core is damaged or not.
3: If the optical port and pigtails are dirty, apply alcohol and cotton to clean them before drying.
4: When laying the line, the video transmission cable should be made of 75-5 cable with good shielding and good transmission quality, and should try to avoid the AC line and other objects that easily cause electromagnetic interference.
There is no control signal or the control signal is abnormal. Check whether the data signal of the optical transceiver is correct.
a: Check the data port of the product manual. Check if the data cable is connected correctly and firmly. In particular, the positive and negative poles of the control line are reversed.
Check whether the format of the control data signal sent by the control device (computer, keyboard, DVR, etc.) is the same as the data format supported by the optical transceiver (see the ** page of this manual for details of the data communication format). Check if the baud rate exceeds that supported by the optical transceiver. Range (0-100Kbps).
b: Check the data port of the product manual. Check if the data cable is connected correctly and firmly. In particular, the positive and negative poles of the control line are reversed.
Data short-circuit test method This method is a simple and practical method for RS485, RS422 format optical transceiver data signal detection for control signals.
When the power supply and optical path of the optical transceiver are connected properly, the Rx/Power indicator of the optical transceiver receiving and transmitting terminal is orange (or green). Ground the data + terminal on the input side of the data signal (as defined in the data sheet). If the Rx/Power indicators on the receive and transmit ends turn red, the Rx/Power indicator on the receive and transmit ends when the short is removed is Orange (or green). Then explain that the data part of the optical transceiver works normally and the optical path is connected correctly.
First, equipment installation 1, fixed optical transceiver.