Oscilloscope people know how hard triggering may be. Using the wrong options may result in unstable waveform captures, and at times, even the wrong measurement data. x? s? hôm nayxsmtsxmtx? s? mi?n trungk?t qu? x? s? mi?n trungkqxsmtxsmt hôm nayx? s? mi?n trung hôm nayx? sô