HJ Son

Thank you very much for your kind answer. Trigger record seems to work fine. The slightly modified source code and project files are attached below. https://drive.google.com/file/d/1s2U49mt-7Zw9euQcCVgq-0CeeMuLfSuA/view?usp=share_link Last more 1 questions : I set the sampling rate to 100Mhz, but the pulse start position is different. Do you know why? Should I modify my trigger settings? // 100MHz sample rate Dwf.AnalogInFrequencySet(hdwf, 100000000.0); // make sure we calculate record length with the real frequency var hzAcq = Dwf.AnalogInFrequencyGet(hdwf); Dwf.AnalogInRecordLengthSet(hdwf, 1.0 * nSamples / hzAcq); // configure trigger Dwf.AnalogInTriggerSourceSet(hdwf, TRIGSRC.DetectorAnalogIn); Dwf.AnalogInTriggerAutoTimeoutSet(hdwf, 10.0); Dwf.AnalogInTriggerChannelSet(hdwf, 0); Dwf.AnalogInTriggerTypeSet(hdwf, TRIGTYPE.Edge); Dwf.AnalogInTriggerLevelSet(hdwf, 1.0); Dwf.AnalogInTriggerHysteresisSet(hdwf, 0.005); Dwf.AnalogInTriggerConditionSet(hdwf, TRIGCOND.RisingPositive); Form1.cs

I am using c# and I want to add CH1 trigger in analogin_record example. I tried the source code below, but it doesn't seem working CH1 trigger. Can I get the example source code that becomes a record when a trigger input is received? I have attached the project source code. https://drive.google.com/file/d/1Bbjg7fEu4K6su_-XfZq2uIJP6SbVPnkg/view?usp=share_link Thank you!! try { int cSamples = 0; bool fLost = false; bool fCorrupted = false; textBox1.AppendText("Open automatically the first available device\n" + Environment.NewLine); var hdwf = Dwf.DeviceOpen(-1); // get the number of analog in channels var cChannel = Dwf.AnalogInChannelCount(hdwf); textBox1.AppendText("Analog IN Channels : " + cChannel + Environment.NewLine); // enable CH 1 Channel Dwf.AnalogInChannelEnableSet(hdwf, 0, true); // set 5V pk2pk input range for all channels Dwf.AnalogInChannelRangeSet(hdwf, 0, 5); // recording rate for more samples than the device buffer is limited by device communication Dwf.AnalogInAcquisitionModeSet(hdwf, ACQMODE.Record); // 50KHz sample rate Dwf.AnalogInFrequencySet(hdwf, 50000.0); // make sure we calculate record length with the real frequency var hzAcq = Dwf.AnalogInFrequencyGet(hdwf); Dwf.AnalogInRecordLengthSet(hdwf, 1.0 * nSamples / hzAcq); // configure trigger Dwf.AnalogInTriggerSourceSet(hdwf, TRIGSRC.DetectorAnalogIn); Dwf.AnalogInTriggerAutoTimeoutSet(hdwf, 10.0); Dwf.AnalogInTriggerChannelSet(hdwf, 0); Dwf.AnalogInTriggerTypeSet(hdwf, TRIGTYPE.Edge); Dwf.AnalogInTriggerLevelSet(hdwf, 1.0); Dwf.AnalogInTriggerConditionSet(hdwf, TRIGCOND.RisingPositive); // wait at least 2 seconds with Analog Discovery for the offset to stabilize, before the first reading after device open or offset/range change Wait(2); // start Dwf.AnalogInConfigure(hdwf, false, true); textBox1.AppendText("Waiting for triggered or auto acquisition" + Environment.NewLine); STATE status; do { status = Dwf.AnalogInStatus(hdwf, true); } while (status != STATE.Done); textBox1.AppendText("Recording..." + Environment.NewLine); while (cSamples < nSamples) { var sts = Dwf.AnalogInStatus(hdwf, true); if (cSamples == 0 && (sts == STATE.Config || sts == STATE.Prefill || sts == STATE.Armed)) { // Acquisition not yet started. continue; } var stats = Dwf.AnalogInStatusRecord(hdwf); cSamples += stats.Lost; if (stats.Lost > 0) { fLost = true; } if (stats.Corrupt > 0) { fCorrupted = false; } if (stats.Available > 0) { var remaining = nSamples - cSamples; var todo = Math.Min(remaining, stats.Available); // get samples Dwf.AnalogInStatusData(hdwf, 0, CH1_ADC_DATA, cSamples, todo); cSamples += stats.Available; } } textBox1.AppendText("done" + Environment.NewLine); textBox1.AppendText("DATA Length : " + CH1_ADC_DATA.Length + Environment.NewLine); FUNCTION_ADC_DATA_DISPLAY(); if (fLost) { textBox1.AppendText("Samples were lost! Reduce frequency" + Environment.NewLine); } else if (fCorrupted) { textBox1.AppendText("Samples could be corrupted! Reduce frequency" + Environment.NewLine); } // close the device Dwf.DeviceClose(hdwf); } catch (Exception ex) { textBox1.AppendText("Error: " + ex.Message + Environment.NewLine); } Form1.cs