由于目前国内较多的电视信号（如：电视台、局域的闭路电视等）不标准，造成电视机不时出现问题，即使电视机通过了国标、企标测量项目（包括标准及不标准信号），卖到各地市场仍成问题。因此，不得不再花人力、物力去现场实际解决问题，因为这些现象在实验室里根本无法模拟。 Due to the current domestic more television signals (such as: television stations, local closed-circuit television, etc.) is not standard, causing problems from time to time television sets, even if the TV has passed the national standard, enterprise standard measurement items (including standard and non-standard signals) Sold around the market is still a problem. Therefore, we have to spend extra manpower and material resources to actually solve the problem on site, because these phenomena can not be simulated in the laboratory at all.