Teledyne LeCroy Eye Doctor II - Manual (Page 5)

Operator's Manual
Eye Doctor II Overview
Eye Doctor II is a complete set of tools that allows the full-range of de-embedding, emulation and equal-
ization on full record lengths (up to 1024 Mpts) with little impact on waveform processing time and with
results integrated into the oscilloscope interface for further analysis using LeCroy's complete, deep anal-
ysis toolbox. Eye Doctor II uses industry-standard S-Parameter measurements and Touchstone 1.1 files
created with Teledyne LeCroy SPARQ series network analyzers, VNAs, TDRs, simulators,
LeCroy WaveExpert (to name a few), and are the universal language of signal integrity engineers. All basic
capability is easily accessed in a streamlined, simple user interface.
Eye Doctor II is fully integrated into the SDAIII-CompleteLinQ product, which is available for WavePro 7
Zi/Zi-A, WaveMaster 8 Zi/Zi-A, LabMaster 9 Zi-A and LabMaster 10 Zi series oscilloscopes. Users of SDAIII-
CompleteLinQ will want to access Eye Doctor II capabilities from the SDA Framework dialog, where they
are part of the overall serial data analysis processing chain.
Note: Virtual Probing, which was part of the original Eye Doctor package and is also included in Eye Doc-
tor II, is an advanced capability that can still be configured from the WebEditor view. Most users will
prefer the newer VirtualProbe software package instead. This package provides a user-interface that is far
simpler than the virtual probe capability included with Eye Doctor II.
Key Features
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Transmitter Emphasis Emulation - Transmitter Emphasis Emulation allows for adding or removing
emphasis from signals. Using the Auto Add or Auto Remove function, enter the amount of empha-
sis to add or remove. Custom mode allows for specifying the specific tap values for the linear
tapped delay line filter creating the emphasis. Both Pre-emphasis and De-emphasis are supported
in Eye Doctor II.
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Fixture De-embedding - Fixture De-embedding allows for moving the reference for measurements
to a point before the fixture (such as, directly to the transmitter output) by removing the effects of
the fixture. A Touchstone Format S-Parameter file describing the fixture is required to de-embed.
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Channel Emulation / De-embedding - Channel Emulation / De-Embedding can be used to see the
effect a channel is having on measurements. This works in both directions. You can emulate chan-
nel effects to see what the signal would have looks like if the measurement is taken after the serial
data channel. Conversely, you can de-embed the effects of a physical channel to see what the sig-
nal looks like if the measurements are taken before the serial data channel. It is very similar to Fix-
ture De-embedding. For both emulation and de-embedding of serial data channels, a Touchstone
Format S-Parameter file describing the channel is required.
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Receiver Equalization Emulation - Receiver Equalization provides the ability to emulate the effects
a Continuous Time Linear Equalizer, Feed Forward Equalizer, and/or Decision Feedback Equalizer
has on a serial data signal. This is critical step for some serial data signals that could have a com-
pletely closed eye at the receiver input.
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