Operator's Manual JITKIT Software
JITKIT Software Operator's Manual © 2013 Teledyne LeCroy, Inc. All rights reserved. Unauthorized duplication of Teledyne LeCroy documentation materials other than for internal sales and distribution purposes is strictly prohibited. However, clients are encouraged to distribute and duplicate Teledyne LeCroy documentation for their own internal educational purposes. JITKIT and Teledyne LeCroy are trademarks of Teledyne LeCroy, Inc. Windows is a registered trademark of Microsoft Corporation.
Operator's Manual Contents JITKIT Overview Key Features JITKIT Example Setting up JITKIT 2 3 3 4 Quick View 5 JITKIT Source Setup 7 JITKIT Gating 9 JITKIT Measure Jitter Parameters JITKIT Measurement Table Set Up Jitter Measurements 10 10 10 11 JITKIT Plot JITKIT Plot Types Set Up Jitter Plot 12 12 13 922810 Rev A 1
JITKIT Software JITKIT Overview Teledyne LeCroy's JITKIT option makes it simple and easy to understand basic system jitter performance of clock signals or clock-clock and clock-data timing activity. JITKIT is specifically designed for these types of measurements. Teledyne LeCroy offers other software options for in-depth and comprehensive jitter decomposition and analysis of serial data signals. Jitter is a deviation in timing, period, width, or amplitude from a “perfect” or a “reference” position(s).
Operator's Manual Key Features l l l l l Provides direct display of jitter measurement values, for both clock signals and clock-clock or clock-data timing. Jitter parameter readouts include maximum positive and negative deviations, worst case deviation, peak to peak, and standard deviation on more than 25 jitter related parameters. Jitter plots show the time domain, frequency domain and statistical domain views of jitter.
JITKIT Software Setting up JITKIT 1. Access the JITKIT dialogs by choosing Analysis → Jitter Kit. The main dialog (Jitter Kit) shows the basic flow of the jitter analysis through a simple block diagram progressing from left to right. Each block in the diagram is also a button. Touching any of the buttons opens its corresponding dialog. 2. Check the Enable checkbox. Clearing this box turns off all trace and parameter displays, however, the setup remains in effect. 3.
Operator's Manual Quick View The JITKIT Quick View provides an instant setup that includes the four views of jitter and the key jitter parameters. The only required user input in the Quick View setup is the definition of the input signal. Additionally, you may specify the crossing level. Quick View Signal Input(s) to be Analyzed dialog Follow these steps to set up Quick View: 1. Touch Analysis → Jitter Kit on the menu bar. 2. On the Jitter Kit dialog, touch the Quick View button.
JITKIT Software If you want to use a relative level set to the selected percentage on each acquisition, touch inside the Use Level Type field and choose Percent from the pop-up menu. Then, you can use the quick buttons below to select commonly used percentage levels, for example, if you selected the Percent level type, you can touch the Set to 10%, 50%, or 90% button to quickly set the levels or touch the High, Mid and Low buttons to set the levels using your preferred input control method. 5.
Operator's Manual JITKIT Source Setup Use the JITKIT Source Setup dialog to set up the jitter source signal(s). The JitSource1 and JitSource2 traces are replicas of your channel, but they also have the ability to be easily and automatically time synchronized with the Jitter Track (JitTrack). They also provide the convenience of using two inputs of a differential signal to the oscilloscope and having one trace without needing to separately set up a math function to perform this activity.
JITKIT Software 4. Touch the Input button to select an input from the Select Source dialog. 5. Touch the Use Level Type to choose a level type from the pop-up menu (Absolute, Percent, etc.). For example, if you want to set an absolute crossing level, touch inside the Use Level Type field and choose Absolute from the pop-up menu. Then, touch inside the Abs Level data entry field and enter the voltage level at which the signal timing is measured.
Operator's Manual JITKIT Gating Using gates, you can narrow the span of the waveform on which to perform jitter measurements, allowing you to focus on the area of greatest interest. You have the option of dragging the gate posts horizontally along the waveform, or specifying a gate type. There are three gate types: l l l Division - specify a position down to the hundredths of a division.
JITKIT Software JITKIT Measure Selecting your jitter parameter measurements is the key step in performing jitter analysis on your signals. You can define measurements on up-to-8 waveforms. Jitter Parameters There are parameter modes for the amplitude and time domains, custom parameter groups, and parameters for jitter testing.
Operator's Manual Set Up Jitter Measurements 1. Touch Analysis → Jitter Kit... on the menu bar,then touch the Measure tab to access the Measure dialog. 2. Touch the Show Table checkbox to display the Jitter Kit Measurement Table below the grid. 3. Touch the Clear Sweeps Every Acq checkbox to clear data from every sweep (acquisitions). Note: Touch Clear Sweeps Now to clear data from sweeps (acquisitions). If you touch it during waveform readout, it cancels the readout. 4.
JITKIT Software JITKIT Plot You define the plot and grid modes on the Jitter Kit Plot dialog. JITKIT Plot Types You can choose to display any of the following types of plots: JitSource1 and JitSource2 - These traces are replicas of your channels, but they also have the ability to be easily and automatically time synchronized with the Jitter Track (JitTrack).
Operator's Manual The Jitter Overlay overcomes these limitations. Using knowledge obtained mathematically from a single long acquisition, it recreates the display described above for any jitter behavior without a contribution of jitter from the oscilloscopes trigger circuitry and. This simple view can quickly and intuitively reveal quite a bit about the circuit behavior. Set Up Jitter Plot 1. Touch Analysis → Jitter Kit... on the menu bar, then touch the Plot tab. 2.
