Luohe 1IP public broadcasting monopoly wholesaler Jiaming Yang Zheng * City market in 1503 +71780 +75 www.69139139.com 534 +64 +9528 Milan sun, Building 5, Unit 2, 208 IP public address system debugging main public IP broadcasting system installed after the construction is completed, the installation process is comprehensive, routinely check, and for the opening of the trial, and the sound quality evaluation, its main tasks: transmission line inspection, connected with checking the insulation resistance measurement, ground resistance measurement antenna debugging, power test, the system opened to test the sound pressure measurements and sound quality evaluation: a public broadcasting transmission lines, transmission line checks IP divided into indoor and outdoor wiring should check the inspection line from the device terminals Disconnect check in accordance with the construction drawings, the the IP Public Broadcasting System Figure brightest transmission wiring is correct, whether there is a short circuit, open circuit, mixed line failure; terminals Numbers are complete, correct, whether welded terminal block. Playing for the fault to be found one by one to the exclusion, and retightening terminals connected; each plug and socket connection is welded, the wiring is correct and reliable shield connection is complete good to meet the requirements. Mating check the line on the construction drawings check each circuit or broadcasting equipment transformer is connected with the correct, especially the multi-tap transformer connection terminals are often easy to pick the wrong, pay attention to check bobble received more transformer primary secondary reverse phenomenon; Figure checking transformer model, capacity and impedance matching, insulation resistance was measured two the IP public broadcasting line terminals disconnected with 500V megger, measure the insulation resistance between its lines. The measurement projects: lines and lines and ground insulation resistance, insulation resistance generally not less than 0.5MΩ, the sub loop measurements should be carried out for each loop resistance measurement values ??should complete a record as a commissioning report cross-building units custody. IP public address system of ground resistance measurement of grounding resistance, mainly in the IP public broadcasting room grounding electrode; measuring ground resistance tester. The IP public broadcasting room amplifier, surge arresters frequency grounding resistance is usually not more than 10Ω, more than 150 W, when the capacity of of IP public broadcasting system as a separate set grounding electrode group difficult with electrical devices share a set of ground pole, but the ground grounding resistance should not be greater than 4Ω, and should set up a dedicated ground lines. Power test to measure the AC supply voltage, the power supply line should not short-circuit, open circuit phenomenon, power switch-off cao the trial, check the power signal; standby power swap device check test battery output voltage measurement; rectifier charging device to check measurements; to do analog power outage test, verify the power inter voted device is working reliably. Jiaming Yang 1503 +71780 +75 www.69139139.com 534 +64 +9528 Milan sun, Zheng * City Market Building 5, Unit 2, 208