2013 Volume 10 Issue 13 Pages 20130393
Estimating the precision of a multichannel telemetry data system accurately and efficiently is important because of the high cost of flight experiments and the complexity of telemetry data. System precision is significantly determined by the crosstalk effect. This paper proposes an efficient precision estimation method for data acquisition system based on multichannel phase-shift rectangular waveforms. The experiments are conducted to test the precision of the multichannel data acquisition system. Experimental results show that the proposed approach can estimate the precision of the acquisition system accurately; this finding was further validated by comparing the results with those of the IEEE Std 1057-2007 method. In addition, the measurement time of the proposed method was significantly shorter. In contrast to the existing method, the proposed method can locate faulty signal channels rapidly and estimate system precision effectively and efficiently.