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介绍了在瞬态高强度辐射场中精确获取ns量级的单次快脉冲的意义,分析了采集这类电脉冲信号的技术难点,并针对其难点设计了一种能精确获取其信号全波形的高速采集系统。系统的采样率为1 Gs/s,模拟输入带宽最大500MHz,8位分辨率,采样点数可达3×105以上,通过其内部独特的自触发式提前采样设计,能对瞬态脉冲的快前沿实现精确的定时和完整的采集。最后,对研制完成的系统进行了信号完整性测试和性能标定,并对前后沿均为5 ns,脉宽10 ns的单次脉冲进行采集,从实验结果可知,该脉冲信号的前沿部分被完整地记录下来,并且脉冲的波形几乎没有产生畸变。
The significance of accurately obtaining a single fast pulse of ns order in transient high intensity radiation field is introduced. The technical difficulties of acquiring such pulse signals are analyzed. Aiming at its difficulty, Speed acquisition system. System sampling rate of 1 Gs / s, the maximum analog input bandwidth of 500MHz, 8-bit resolution, the number of sampling points up to 3 × 105 above, through its unique internal self-trigger sampling design in advance, the fast edge of the transient pulse Achieve precise timing and complete acquisition. Finally, the signal integrity test and performance calibration of the developed system were carried out. A single pulse of 5 ns pulse width and 10 ns pulse width was collected. The experimental results show that the front part of the pulse signal is complete Recorded, and the pulse waveform almost no distortion.