Use the hyperlinks of the WaveScan table to find and display the min and max pulse risetimes. The value field reads the last measured value and corresponds to the last value in the WaveScan table. Additionally, we can read the mean, minimum (min), maximum (max), and standard deviation (sdev) of the 11 instances. The number (Num) readout for P1 should reflect this value. We have eleven leading edges on the screen and the statistics include all eleven risetime values. The WaveScan measure mode using the risetime parameterĪt this point you should see the first parameter, P1, is reading the risetime of trace C1. The measurement display will now show the statistics fields. The measurements are displayed under the grid area as shown in Figure 4. Setup parameter P1 to measure the risetime of C1Ĭheck the Show Table checkbox. Use the Measure pulldown menu and select Measurement setup. Investigate the measurements which are available in the scroll list. Use the WaveScan Mode field and set WaveScan to the measurement mode. In this tutorial we will use the edge and measurement modes as the primary examples. MSO’s are Mixed Signal Oscilloscopes which offer 18 or 36 digital channels in addition to the 4 analog inputs. Serial Pattern – Searches from 2 to 64 bits ideal for bursted patterns where a PLL cannot lock.īus Pattern – Searches from 2 to 64 bits enhances MSO search capabilities. Measurement Mode - for filtering and performing parameter measurements Runt - for detecting pulses that fail to cross a threshold selectable polarity and thresholds Non-monotonic Mode - for detecting threshold re-crosses selectable slope, hysteresis, and level. Modes are used to locate anomalies during acquisition.Įdge Mode - for detecting the occurrence of edges selectable slope and level. The mode selection popup will be displayed (Figure 3). Zoom controls on the front panel can be used to control the Zoom trace settings.Ĭlick or touch the Mode field in the WaveScan dialog box. The table entries are hyperlinked to the zoom setup so you can bring any WaveScan event into the zoom trace for closer study. Note that the zoom trace source jumps to that pulse. Stop the acquisition update by pressing the Stop button in the Trigger area of the front panel.Ĭlick or touch any entry in the WaveScan table. The highlighted area on the source trace shows the specific edge being expanded. This zoom trace is showing the source trace expanded horizontally by a factor of ten to one (10:1). Note also that trace Z1, the zoom of trace C1 has also been turned on. The locations of each edge are shown in a table in the upper left hand corner of the display. Each event (edge) meeting the criterion is highlighted with a red line. You will note it is set to find positive edges where the edge threshold is 50% of the signal amplitude. It is using Edge Mode which finds each edge in the source trace. The scope display should be similar to Figure 1.įigure 2 shows WaveScan’s default setup. Auto Setup the scope: Press AutoSetup button on the front panel twice.Recall the default setup: File pulldown > Recall Setup> Recall Default.Connect a passive probe from channel 1 to the Cal test point on the front panel ground the probe to the adjacent ground terminal.WaveSurfer 104MXs-B oscilloscope (or other WaveSurfer Xs-B oscilloscope)ĭisplays shown in the tutorial are based on the following initial setup on a WaveSurfer 104MXs-B oscilloscope scope: When used in multiple acquisitions, WaveScan builds on the traditional LeCroy strength of fast processing of data. ![]() For instance, there is no “frequency” trigger in any oscilloscope, yet WaveScan allows for “frequency” to be quickly “scanned.” This allows the user to accumulate a data set of unusual events that are separated by hours or days, enabling faster debugging. Since the scanning “modes” are not simply copies of the hardware triggers, the utility and capability is much higher. Select from more than 20 search modes to find events on any analog or digital channel or search for a pattern across multiple digital channels. WaveScan provides the ability to locate unusual events in a single capture (i.e., capture and search), or “scan” for an event in many acquisitions over a long period of time. WaveScan provides powerful isolation capabilities that hardware triggers can’t provide.
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