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Technical Library

The Application Notes section of the Teledyne LeCroy Technical Library lets you search for, browse, and print the latest technical documentation. A search aid allows you to filter documents by category or keyword.

Application Notes on this site are available in PDF format for easy download.

Application Notes

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PCIe LTSSM Link Partner TxEQ Response Characterization and Debug during Link Equalization Training

Measurement tools that provide visibility into the interplay between a PCI Express Physical Layer’s Logical sub-block and Electrical sub-block are important for characterization and debug purposes. Both Upstream and Downstream ports must work in tandem to effectively negotiate optimal receiver and transmitter equalizer filter settings, in order to minimize the probability of bit errors on either side of the link. Teledyne LeCroy’s extensive set of PCIe test and measurement tools provide the ability to simultaneously view and analyze the protocol and electrical response of the PCIe bus, enabling quick and valuable insight into complex PCIe system behavior.

Understanding Jitter Calculations: Why Dj Can Be Less Than DDj (or Pj)

This is a frequently asked question that warrants further explanation. Although data-dependent jitter (DDj) and periodic jitter (Pj) are indeed subsets of deterministic jitter (Dj), it is perfectly reasonable to get a result of Dj < DDj or Dj < Pj. This application note explains how DDj, Pj and Dj are measured on Teledyne LeCroy Serial Data Analyzers and oscilloscopes with SDAII or SDAIII-CompleteLinQ, and describes how a result of Dj < DDj or Dj < Pj can occur.

Dynamic Measurements of Phase Lock Loop Transient Response

Plotting variations in measured parameters make track functions ideal for studying the dynamics of phase locked loops.

Parameter Qualifiers

Parameter acceptance criteria add additional flexibility to oscilloscope measurements.

Digital Filter Applications

Filters are useful components in the analysis of signals in an oscilloscope. This technical brief provides examples.

Frequency Response Measurements

Measuring the frequency response of a device based upon its step response.

Multi-Stage, Multi-Rate Filters

The range of cutoff frequencies in the DFP2 filter option can be extended using multi-stage, multi-rate filtering.

Data Logging Using Trend Plots

Data Logging is the ability to make multiple measurements of key circuit parameters acquired simultaneously at known times. Teledyne LeCroy oscilloscopes, equipped with trend analysis have all the tools necessary for data logging up to eight parameters.

Decoding DALI with the Manchester Configurable Protocol Decoder

Based on Manchester encoding, the Digital Addressable Lighting Interface links controllers with lighting devices in building infrastructure applications. Here's how to use a Teledyne LeCroy oscilloscope equipped with Manchester decode software to properly decode DALI signals.

Decoding PSl5 with the Manchester Configurable Protocol Decoder

Based on Manchester encoding, the PSI5 interface links sensors with controllers in many vehicular applications. Here's how to use a Teledyne LeCroy oscilloscope equipped with Manchester configurable protocol decode software to properly decode PSI5 signals.
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