Decoder common faults and solutions are the key content for everyone to explain, the decoder is relative to the encoder, the encoder is to convert the input signal into a specific digital signal information, and the decoder is to The code is restored to the original device. This or that problem may occur during the use of the decoder, and it is easy to see what problems the decoder may have
Why does the decoder code turn light not flash?
Phenomenon : software settings (lights do not flash, mainly the code converter is not working, first set out to solve this problem from the software settings)
solution:
1. Decoder settings in the software (decoder protocol, com port, baud rate, parity bit, data bits, stop bits);
2, replace a com mouth (check com mouth is damaged);
3, hardware, such as the above settings, still can not be used normally, open the 9-pin to 25-pin converter interface. Check if the wiring is 2-2,3-3,5-7. If it is correct, check if the power supply of the code converter is normal (available with a multimeter for voltage and current testing (9V, 500mA)). No problem can be determined by the code converter. Damaged.
Why can't the decoder control the PTZ?
solution:
1. Check if the sixth item above is normal;
2. Whether the output voltage of the decoder's 24v or 220v power supply port is normal;
3. Power the up, down, and ptcom lines of the PTZ directly to check if the PTZ can work normally.
4, check the power supply interface is connected to the wrong;
5, check whether the circuit is connected to the wrong (the old decoder for the up, down and other lines and ptcom direct power supply to the cloud, the line and the camera and the PTZ line directly connected to it; some decoders for the independent power supply interface.
Why can't control the decoder?
Phenomenon : There is no relay sound in the decoder
1, check whether the decoder power supply;
2, check the code converter to pull out the output 485 signal;
3, check whether the decoder protocol is set correctly;
4. Check whether the baud rate setting is in accordance with the decoder (check whether the address code setting is consistent with the selected camera (detailed address code dialing table is shown in the decoder manual);
5, check the decoder and the code converter wiring is wrong (1-485a, 2-b; some decoder is 1-485b, 2-a);
6. Check whether the decoder works normally (when the old decoder powers off after a minute, if there is a self-test sound; when the software controls the gimbal, there will be voltage changes between the ports of the decoder, up, down, auto, etc., and the ptcom port. Depending on the decoder, changes may be made to the 24vor220v. Some of these decoders will have digital signal changes on these ports. If so, the decoder is working properly; otherwise, the decoder is faulty.
7. Check if the fuse of the decoder has been burned out.
The decoder is an important front-end control device. Under the control of the host, the front-end device can make corresponding actions. Decoders are front-end devices that provide drive power to controllable devices such as pan/tilt and zoom lenses and communicate with control devices such as matrices. In general, the decoder can control the pan and tilt of the up, down, left, and right rotation, zoom lens zoom, focus, aperture and control of the device wiper wiper, camera power supply, lighting and other equipment can also provide a number of auxiliary function switch To meet the actual needs of different users. The high-end decoder also comes with presets and cruise functions.
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