Scenes to be used: At the performance site or during engineering debugging, if the signal of some lamps is unstable, or the lamps are out of control or unresponsive. You can use this signal line tester to test signals, or check lines individually. One end of the signal cable is connected to the signal output port of the console, and the other end is connected to the signal tester. Warm reminder: During testing, ensure that the console is connected to the signal. Do not test on ports other than signal lines. Each lighting console has a different refresh rate, so the LED indicator may flicker when testing signals. This does not affect the normal use of the measuring device. Line measuring device fault prompt: 1. The blue, red, and green indicators are all on, which means the signal is normal. 2. A single green indicator light is on, indicating that the ground wire is disconnected or short-circuited. 3. A single blue indicator light is on, indicating that the positive pole of the signal is disconnected or short-circuited. 4. A single red indicator light is on, indicating that the negative pole of the signal is disconnected or short-circuited. 5. The red and green indicator lights are on, indicating that the negative pole of the signal and the ground wire are short-circuited. Color: As shown Material: Stainless steel Package Contents: 1 x DMX512 line tester Only the above package content; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.