关键词: 信号采集, 路际串扰, 等效电路, 通道切换

Abstract: The data acquisition system is the key subject for the aerocraft telemetry system. Multi-channel crosstalk is the significant subject under high bit-rate transmission. Aiming at the multi-parameter rapid switch of acquisition system, equivalent circuit prototype was introduced. The mechanism of multi-channel crosstalk is theoretically investigated and analyzed. The methods to avoid multichannel crosstalk were proposed. The hardware platform were established to test and verify performance. Test results show that the mechanism of multi-channel crosstalk is correct and the engineering application methods are effective. The methods can decrease crosstalk from different channels, and improve acquisition precision of telemetry parameters.

Key words: Signal acquisition, Multi-channel crosstalk , Equivalent circuit, Channel switch