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Agilent Technologies 16760A manual 146

Models: 16760A

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Chapter 4: Using the Logic Analyzer in Eye Scan Mode

Displaying Captured Eye Scan Data

•Turn on the Slope Tool tool. This tool is for measuring the slope of rising and falling edges in an eye. It also shows the change in time and voltage between two points. The slope tool is a line with two endpoints that can be repositioned.

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Contents

Agilent Technologies 16760A Logic Analyzer Agilent Technologies. All rights reservedAgilent Technologies 16760A Logic Analyzer Captures input signals as low as 200 mV p-pSampling Mode on ProbingReference on Concepts onSee Also Glossary seeContents Choosing the Sampling Mode 112 Using Symbols 101110 114155 Displaying Captured Eye Scan Data152 Format Tab 174211 Eye Scan Tab 204210 259 Specifications and Characteristics240 Glossary Index Contents Getting Started Eye scan sampling mode, measurements will have these steps Connect logic analyzer to the device under test Probing and Sampling Mode Selection StepsNext . Choose the sampling mode on Choose the sampling mode To choose the sampling modeIf you chose Timing Mode If you chose State ModeIf you chose Eye Scan Mode Next . Format labels for the probed signals onEither Timing Mode or State Mode Format labels for the probed signals To assign pods to the logic analyzer To specify threshold voltagesTo assign names to logic analyzer channels NextDefined threshold voltage Select the Close button Timing Mode or State Mode Steps Define the trigger conditionRun the measurement Next . Run the measurement onTo open Waveform or Listing displays Display the captured dataNext . Display the captured data on Next For More Information... on To add display tools via the Workspace windowEye Scan Mode Steps Select channels for the eye scan measurementSet the eye scan range and resolution Next . Set the eye scan range and resolution onRun the eye scan measurement Next . Run the eye scan measurement onDisplay the captured eye scan data Next . Display the captured eye scan data onEye Scan display window, use the following subtabs For More Information For More Information Probing and Selecting the Sampling Mode Probing and Selecting the Sampling Mode Using the E5378A Single-Ended Probe Probing the Device Under TestNumbers Single-ended signalNumber EitherUsing the E5379A Differential Probe Negative data inputs Or single-ended signalsIndependent threshold adjustment Reference voltageUsing the E5380A Mictor-Compatible Probe Or AMPUsing the E5382A Single-ended Flying Lead Probe Set Using an Analysis Probe Additional AccessoriesProbing the Device Under Test Choosing the Sampling Mode Selecting the Timing Mode Asynchronous SamplingTo select the timing mode To select the conventional/transitional configurationTo specify the sample period Sample rate is the inverse of the sample periodTo automatically adjust sampling positions on Selecting the State Mode Synchronous SamplingState Mode Sampling Position To manually adjust sampling positions onTo select the state mode To select the state speed configurationTo set up the sampling clock For the clock input signal that will be usedRun simultaneously To automatically adjust sampling positionsAutomatically sets the sampling position Choose the labels that you wish to run eye finder on To run eye finder repetitivelyTo save/load eye finder data To view eye finder data as a bus compositeTo view eye finder data as a stack of channels Eye finder data must be saved and loaded separately To manually adjust sampling positionsEye Finder Advanced Settings Dialog on To set acquisition memory depth Either Timing Mode or State ModeTo specify the trigger position You can give more descriptive names to a logic analyzer To name an analyzerTo turn an analyzer off or on You can also name analyzers in the Pod Assignment Dialog onTo select the eye scan mode speed configuration Selecting the Eye Scan ModeTo select the eye scan mode High-speed or high-bandwidth oscilloscopeTo set up the eye scan mode reference clock To assign pods to the analyzer Format tab has activity indicators that show signal levelsFormatting Labels for Logic Analyzer Probes To set pod threshold voltages Capturing Data on 17 Channels in State ModeTo set up qualified eye scan measurements on To set clock threshold voltages To assign probe channels to labels To delete labels Maximum of 32 channels can be assigned to a labelLabel off E5378A and E5380A probe types to be selectable SignalsTo import label names and assignments from a netlist LabelLabel Definition File Format Examples To import label definitions from an Ascii fileTo assign label name Blue to channel 5 on pod A2 Channel 5 on pod A2, and channel 6 on pod A1 To export label definitions to an Ascii fileTo change the label polarity Changing the label polarity does not affect To reorder bits in a labelChanging the label polarity will have the following effects To turn a label on To turn labels off or onTo turn a label off To display a label that was offUsing the Logic Analyzer in Timing or State Mode Using the Logic Analyzer in Timing or State Mode General Setting Up Triggers and Running MeasurementsUse trigger functions for basic measurements Using Trigger Functions To select a trigger functionTo specify a label pattern event Timing only To enter symbolic label values on Symbols Selector Dialog on To specify a label edge eventTo expand a trigger function To compress a trigger functionTo load/unload trigger function libraries To copy trigger function libraries between systemsUsing Other Trigger Features To count time, states, or turn counting offReduced by half in order to store the required time tags To specify default storingTo assign pods to the analyzer on If you chose CustomTo clear default storing changes To insert a store action state mode on Default storing is initially on or offTrigger tabs Default Storing subtab, select the At start Acquisition option button and choose either On or OffTo insert sequence levels To insert/replace/delete sequence levelsTo clear the trigger sequence on To replace sequence levelsTo cut/copy-and-paste sequence levels Setting Up Triggers and Running Measurements Example system14 Slot C Analyzer C has triggered To clear the trigger sequence To restore default trigger settingsTo view a picture of the trigger sequence Trigger tab, select the Overview subtabTo specify a duration or occurrence count for events To specify a time duration for events timing onlyTo insert a timer action To insert a store action state modeTo insert timer actions/events AvailableTo insert a counter action To insert a timer eventTo insert counter actions/events To insert a counter eventTo insert flag actions/events To drive the Port Out signal with a flag To insert a flag eventTo use named events To insert a reset occurrence counter actionTo group events To give an event list a name Saving/Recalling Trigger SetupsTo save a trigger setup To insert a named eventTo clear the trigger save/recall list To recall a trigger setupRunning Measurements To start/stop measurementsSelect the Stop or Stop All button If nothing happens when you start a measurementTo stop a measurement Waiting for Trigger onTo view the trigger status Displaying Captured Data To open Waveform or Listing displaysWindows Help volumeTo use other display tools Search for particular data values captured on labelsDisplaying Captured Data If the captured data doesnt look correct Analyzer help volumeIntermittent Data Errors Unwanted Triggers Into parallel words which are easier to view and analyzeIf there are filtered data holes in display memory This situation will occur in these casesTo view symbolic values in a listing display To display symbols for data valuesTo view symbolic values in a waveform display 100 To cancel the display processing of captured dataSelect the Cancel button 101 Using SymbolsYou can use symbol names in place of data values when 102 To load object file symbolsTo reload object file symbols To adjust symbol values for relocated code Object file symbols are reloadedTo replace user-defined symbols To create user-defined symbolsWhose symbols you wish to relocate 104To delete user-defined symbols To enter symbolic label valuesWhen entering label values in the trigger sequence To load user-defined symbols106 To create an Ascii symbol fileGeneral-Purpose Ascii GPA Symbol File Format on Create the reader.ini file on your workstation or PC AppendTicoffPage StabsTypeReadOnlyTicoffPage Examples Example for Elf/Stabs109 Example for Coff/Stabs using Ticoff readerExample for Ticoff Printing/Exporting Captured Data You can print captured data from display tool windowsIcon to view the imported data Select the file name and automatic file sequencing optionsSelect the Read File button 111112 Cross-TriggeringTo cross-trigger with another instrument When the logic analyzer drives the arm signal 113To test the logic analyzer hardware on Solving Logic Analysis ProblemsTo test the logic analyzer hardware 114115 Service Center for assistanceSystem help volume To load logic analyzer configurations Saving and Loading Logic Analyzer ConfigurationsTo save logic analyzer configurations 116Using the Logic Analyzer in Eye Scan Mode 117118 To select channels for the eye scan Setting Up and Running Eye Scan MeasurementsEye Scan tab lets you set up and run Eye Scan measurements 119120 To set the eye scan range and resolutionScan Settings Subtab on To set advanced eye scan options To quickly set up another measurement using the scale seeTo run an eye scan measurement 121122 To set up qualified eye scan measurementsAdvanced Subtab on 123 Requirements Signal Timing Burst TransfersMemory device versus a memory controller After the rising edge of the clock Has adjustable sampling positions on each input channelBurst Before the clock edge to after it125 Clock cycle of the next burstAre supported 126 Be sure that the thresholds are set correctly 127Start your target system and select Run Eye Finder For correct state mode acquisitionsNot already expanded DisplayNow, set up eye scan mode 129Select the Eye Scan tab Select the Qualifier subtab 130Select the Qualify eye scan sampling using... button 131To comment on the eye scan settings 133 Displaying Captured Eye Scan DataTo open the Eye Scan display Within the data captured on the bus To select the channels displayedTool 134To use the scaling options To scale the Eye Scan displayScale tab, you can Eye Scan display window, select the Scale tabTo clear the captured eye scan data To quickly set up another measurement using the scaleTo set Eye Scan display options To open the Eye Scan display on137 138 139 To change the Eye Scan color scale 140141 Is zero by defaultMake measurements on the eye scan data on 142 To make measurements on the eye scan dataAbout the captured measurement data 143 144 145 146 147 148 Eye Scan display window, select the Info tab To display information about the eye scan dataScroll bars to navigate through the information 149Info tab, you can 150To comment on the eye scan data 151152 Loading Logic Analyzer Configurations onSaving and Loading Captured Eye Scan Data Sampling Tab on Format Tab on Trigger Tab on 153154 155 Sampling TabSampling tab lets you choose between the logic analyzers Acquisition Timing ModeConventional Transitional 156Period and other times more than two sample periods apart How Samples are Stored in Transitional TimingWill be stored Samples with transitions158 State ModeState Speed Sampling Positions Dialog 159160 Sampling Positions TabFile menu Lets you save/load eye finder data Sampling Position Label buttonsDisplay Area 161XX% complete How the Selected Position BehavesHow the Suggested Position Behaves Cannot run the Eye Finder at this timeComplete Date Cannot run the Logic Analyzer at this timeCharacterizer cannot be loaded 163Select one or more labels in the Eye Finder Setup tab Two common possibilities exist Timeout N K clocks in 5 secThis channel appears to be completely quiet 165Stable region extends beyond the limits of the display Run Eye Finder to characterize this channelSee individual channels for messages 166Numerical value for the item XXX could not be read Disk is probably fullInvalid true/false flag Failed to open file for reading/writing NameFile Name already exists. Overwrite? Unsupported revision level AA.BBEye Finder Setup Tab 169Eye Finder Advanced Settings Dialog 170File Info Tab 171Save Eye Scan ModeReload Save AsSelecting the Eye Scan Mode on 173Data Expander cards which cannot be used in the clock setupFormat Tab Specify the logic analyzer pod and clock threshold voltagesType Pod Assignment DialogName PodsTrigger Tab 176Trigger Functions Subtab 177General Timing Trigger Functions 178179 General State Trigger Functions 180Find pattern1 eventually followed by pattern2 181182 Advanced Trigger Functions 183184 Advanced pattern1 or pattern2 Turbo State Trigger FunctionsState Trigger Functions Searched for186 Half Channel State Trigger Functions 187Intermodule Control Settings SubtabCount 188189 Overview SubtabThis tab gives a picture of the trigger sequence At start Acquisition Default Storing SubtabEvent Specification List Group events191 Status SubtabSave/Recall Subtab Creating trigger function libraries 192That you use to set up resource terms Symbols TabTwo kinds of symbols are available Multiple filesObject file versions See Also 194195 Symbols Selector DialogMatching Symbols Address masking is done by the Align to x Byte option Search PatternOffset By Option Byte option allows you to mask off an address Symbol File FormatsAlign to x Byte Option Qualifies any address from 100C through 100F198 General-Purpose Ascii GPA Symbol File Format107 file 199 GPA Record Format SummaryFormat 200 RecordsDefinitions in the file First address of the section, in hexadecimal Symbol representing the name of the sectionSymbol representing the function name Last address of the section, in hexadecimalNumber of a line in the file, in decimal You can specify symbols for variables usingName of a file 202Comments 203Expand Eye Scan TabLabels Subtab Collapse Shows labels only Select All Selects all channelsScan Range Scan Settings SubtabRun Mode TimeAdvanced Subtab 206Long ShortMedium CustomClock Edge to Sample Qualifier SubtabQualification Names forComments Subtab 209Calibration Status Calibration TabCalibration Instructions Calibration MessagesError Messages 211212 Branch expression is too complexGeneral Guidelines Specific Guidelines 200 Mb/s State and all Timing Modes 213Specific Guidelines 400 Mb/s State Modes If the following sequence does not compileThis one may 214215 216 Specific Guidelines 800 Mb/s State ModeSpecific Guidelines 1250/1500 Mb/s State Mode 217 Possible Causes Goto action specifies an undefined levelHardware Initialization Failed Last sequence level calls goto nextNo more Edge/Glitch resources available for this pod pair Maximum of 32 Channels Per LabelMust assign another pod pair to specify actions for flags Timing sampling mode, flags are are always availablePhrase some of the edges as patterns Possible SolutionsNo more Pattern resources available for this pod pair 220221 No Trigger action found in the trace specificationSlow or Missing Clock Trigger function initialization failure 222Then the approximate time is 32 seconds Trigger inhibited during timing prestoreTrigger Specification is too complex 223224 Combiner resource allocation guidelinesEvent 225 Waiting for TriggerMisaligned boundaries for addresses To save a trigger setup on 226Probes Specifications and CharacteristicsOperating temperature 0 to 45 degrees C 227All specifications are marked by * asterisk E5378A Single-Ended Probe Specifications CharacteristicsE5379A Differential Probe Specifications Characteristics E5378A Input Equivalent CircuitE5379A Input Equivalent Circuit 229230 1500 Mb/s Sampling Mode Specifications and CharacteristicsE5380A Input Equivalent Circuit Characteristics 231232 400 Mb/s Sampling Mode Specifications Characteristics 233200 Mb/s Sampling Mode Specifications Characteristics 234All specifications are marked by * asterisk Conventional Timing Mode Specifications and CharacteristicsTransitional Timing Mode Specifications and Characteristics 235What is a Specification? 236Referred to as an operational accuracy calibration What is a Characteristic?What is a Function Test? 237238 Concepts 239240 Understanding Logic Analyzer TriggeringConveyor Belt Analogy Conveyor belt analogy 241Next Summary of Triggering Capabilities on Summary of Triggering CapabilitiesSequence Levels Next Sequence Levels on243 244 Addr DataBoolean Expressions Ranges BranchesEdges Next Ranges onNext Flags on FlagsOccurrence Counters and Global Counters Trigger Sequence for ModuleAn example trigger sequence to set up this measurement is TimersNext Timers on An edge followed by an edge with a time limitNext Storage Qualification on Default StorageStorage Qualification NeededSequence Level Storage 250Trigger Functions Strategies for Setting Up TriggersNext Strategies for Setting Up Triggers on 251252 Agilent 16715A trigger user interfacePattern2 occurring immediately after Pattern1 253 Same trigger as If/Then statementsStore range until pattern occurs Document Your Trigger Sequences Setting Up Complex TriggersNext Setting Up Complex Triggers on Next Document Your Trigger Sequences onNext Conclusions on ConclusionsDifferent parts of the trigger to describe how they work Inline documentation on an Agilent logic analyzer256 Understanding State Mode Sampling PositionsTo accurately capture data on a bus 257 Window 258Understanding Eye Scan Measurements 259260 261 Are multiple logic analyzer cards in a module in this case Voltage resolution that can be set is 1 mVUsing the Logic Analyzer in Eye Scan Mode on Measurements run simultaneously in parallel263 GlossaryAsterisk * See edge terms, glitch, and labels Divided into 1K 64-state records 264Debug mode See monitor 265Ethernet address See link-level 266267 268 Module/probe interconnect cable 269270 By the channel width of the instrumentProcessor probe See emulation Measurements 271272 273 274 Index 275276 251277 247278 122279 180Label values, symbolic, 105 labels, 22 280281 Positive logic282 242283 107284 Wait for other machine to triggerPublication Number 5988-9044EN January 1