基于自动测试系统的小信号模拟量测量方法研究

Research on Small Signal Analog Measurement Method Based on Automatic TestSystem

摘要:

针对自动测试系统在测量某型组合接收机时出现的测量结果偏差较大的问题，结合组合接收机模拟量小信号测量原理，采用定量试验和工程经验相结合的方法对可能导致自动测试系统“小信号模拟量测量超差”的影响因素逐条展开验证，排除次要影响因素分析得到组合接收机的音频输出功率测量偏差主要为系统误差引起，航向航道电路测量和下滑航道电路测量误差主要为电源谐波引起。基于此提出在自动测试系统中采用集成电源滤波器和软件滤波的组合方法对模拟量小信号测量误差进行修正的解决措施。采用该方法对某组合接收机复检，试验测试结果与出厂相近，且在某型号外场保障已验证其可行。

Abstract:

The paper do a research on the problem that the automatic test system has a large test deviation in measuring a type of combined receiver， combining the small signal analog measurement of the combined receiver , verifying the factors that may cause the “out-of-tolerance of small signal analog test” in automatic test system with quantitative experiment and engineering experience, it is found that the measurement deviation of combined receiver’s audio output power is mainly caused by system error, course channel circuit and down channel circuit are mainly caused by power harmonics. Based on this Conclusion, a solution to correct the measurement error is purposed, which is using integrated power filter and software filter in automatics test system. Adopting the method in a certain type of combined receiver’s reinspection, it’s shows that the test results are close to appearance data, also which is a feasibility method verified by an outfield support.