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Agilent Technologies 16760A manual Using the E5379A Differential Probe, See Also

Models: 16760A

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See Also

Mechanical Considerations

Chapter 2: Probing and Selecting the Sampling Mode

Probing the Device Under Test

If the clock input is a single-ended signal, either ground the negative clock input and adjust the clock threshold voltage in the user interface, or connect the negative clock input to the DC clock threshold reference voltage.

In the user interface, the clock input threshold voltage adjustment is separate from the data input threshold voltage adjustments.

“To set pod threshold voltages” on page 58

“To set clock threshold voltages” on page 59

For complete information, including mechanical considerations such as pin-out and footprint and electrical considerations such as circuit board design best practices, refer to the Agilent Technologies E5378A, E5379A, and E5380A Probes for the 16760A Logic Analyzer user's guide that comes with the probes.

Using the E5379A Differential Probe

The E5379A differential probe has 17 channels and is capable of capturing data at rates up to 1500 Mb/s. The probe has the following inputs:

•16 differential data inputs.

•One differential clock input. The clock input can also be used as a data input.

This probe matches one 17-channel probe cable to a differential 100- pin Samtec connector. Two E5379A probes are required to support the inputs on one 16760A logic analyzer card.

Each E5379A probe requires a mating connector and support shroud built into the device under test.

You can order a probing connector kit, which contains five mating connectors and five support shrouds, using the Agilent part numbers:

•16760-68702 for PC board thicknesses up to 0.062 in.

•16760-68703 for PC board thicknesses up to 0.120 in.

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Agilent Technologies 16760A manual Using the E5379A Differential Probe, See Also

Contents

Agilent Technologies. All rights reserved Agilent Technologies 16760A Logic AnalyzerSampling Mode on Captures input signals as low as 200 mV p-pAgilent Technologies 16760A Logic Analyzer ProbingConcepts on Reference onGlossary see See AlsoContents Choosing the Sampling Mode 110 Using Symbols 101112 114152 Displaying Captured Eye Scan Data155 Format Tab 174210 Eye Scan Tab 204211 240 Specifications and Characteristics259 Glossary Index Contents Getting Started Eye scan sampling mode, measurements will have these steps Next . Choose the sampling mode on Probing and Sampling Mode Selection StepsConnect logic analyzer to the device under test To choose the sampling mode Choose the sampling modeIf you chose State Mode If you chose Timing ModeEither Timing Mode or State Mode Next . Format labels for the probed signals onIf you chose Eye Scan Mode Format labels for the probed signals To specify threshold voltages To assign pods to the logic analyzerDefined threshold voltage Select the Close button NextTo assign names to logic analyzer channels Define the trigger condition Timing Mode or State Mode StepsNext . Run the measurement on Run the measurementNext . Display the captured data on Display the captured dataTo open Waveform or Listing displays To add display tools via the Workspace window Next For More Information... onSelect channels for the eye scan measurement Eye Scan Mode StepsNext . Set the eye scan range and resolution on Set the eye scan range and resolutionNext . Run the eye scan measurement on Run the eye scan measurementNext . Display the captured eye scan data on Display the captured eye scan dataEye 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 Probing the Device Under Test Using the E5378A Single-Ended ProbeNumber Single-ended signalNumbers EitherUsing the E5379A Differential Probe Independent threshold adjustment Or single-ended signalsNegative data inputs Reference voltageOr AMP Using the E5380A Mictor-Compatible ProbeUsing the E5382A Single-ended Flying Lead Probe Set Additional Accessories Using an Analysis ProbeProbing the Device Under Test Selecting the Timing Mode Asynchronous Sampling Choosing the Sampling ModeTo select the conventional/transitional configuration To select the timing modeSample rate is the inverse of the sample period To specify the sample periodState Mode Sampling Position Selecting the State Mode Synchronous SamplingTo automatically adjust sampling positions on To manually adjust sampling positions onTo select the state speed configuration To select the state modeFor the clock input signal that will be used To set up the sampling clockAutomatically sets the sampling position To automatically adjust sampling positionsRun simultaneously To run eye finder repetitively Choose the labels that you wish to run eye finder onTo view eye finder data as a stack of channels To view eye finder data as a bus compositeTo save/load eye finder data Eye Finder Advanced Settings Dialog on To manually adjust sampling positionsEye finder data must be saved and loaded separately To specify the trigger position Either Timing Mode or State ModeTo set acquisition memory depth To turn an analyzer off or on To name an analyzerYou can give more descriptive names to a logic analyzer You can also name analyzers in the Pod Assignment Dialog onTo select the eye scan mode Selecting the Eye Scan ModeTo select the eye scan mode speed configuration High-speed or high-bandwidth oscilloscopeTo set up the eye scan mode reference clock Formatting Labels for Logic Analyzer Probes Format tab has activity indicators that show signal levelsTo assign pods to the analyzer To set up qualified eye scan measurements on Capturing Data on 17 Channels in State ModeTo set pod threshold voltages To set clock threshold voltages To assign probe channels to labels Label off Maximum of 32 channels can be assigned to a labelTo delete labels To import label names and assignments from a netlist SignalsE5378A and E5380A probe types to be selectable LabelTo assign label name Blue to channel 5 on pod A2 To import label definitions from an Ascii fileLabel Definition File Format Examples To change the label polarity To export label definitions to an Ascii fileChannel 5 on pod A2, and channel 6 on pod A1 Changing the label polarity will have the following effects To reorder bits in a labelChanging the label polarity does not affect To turn a label off To turn labels off or onTo turn a label on To display a label that was offUsing the Logic Analyzer in Timing or State Mode Using the Logic Analyzer in Timing or State Mode Use trigger functions for basic measurements Setting Up Triggers and Running MeasurementsGeneral To select a trigger function Using Trigger FunctionsTo specify a label pattern event Timing only To specify a label edge event To enter symbolic label values on Symbols Selector Dialog onTo compress a trigger function To expand a trigger functionTo copy trigger function libraries between systems To load/unload trigger function librariesTo count time, states, or turn counting off Using Other Trigger FeaturesTo assign pods to the analyzer on To specify default storingReduced by half in order to store the required time tags If you chose CustomTo clear default storing changes Trigger tabs Default Storing subtab, select the At start Default storing is initially on or offTo insert a store action state mode on Acquisition option button and choose either On or OffTo clear the trigger sequence on To insert/replace/delete sequence levelsTo insert sequence levels 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 view a picture of the trigger sequence To restore default trigger settingsTo clear the trigger sequence Trigger tab, select the Overview subtabTo specify a time duration for events timing only To specify a duration or occurrence count for eventsTo insert timer actions/events To insert a store action state modeTo insert a timer action AvailableTo insert counter actions/events To insert a timer eventTo insert a counter action To insert a counter eventTo insert flag actions/events To insert a flag event To drive the Port Out signal with a flagTo group events To insert a reset occurrence counter actionTo use named events To save a trigger setup Saving/Recalling Trigger SetupsTo give an event list a name To insert a named eventRunning Measurements To recall a trigger setupTo clear the trigger save/recall list To start/stop measurementsTo stop a measurement If nothing happens when you start a measurementSelect the Stop or Stop All button Waiting for Trigger onTo view the trigger status To open Waveform or Listing displays Displaying Captured DataTo use other display tools Help volumeWindows Search for particular data values captured on labelsDisplaying Captured Data Intermittent Data Errors Unwanted Triggers Analyzer help volumeIf the captured data doesnt look correct Into parallel words which are easier to view and analyzeThis situation will occur in these cases If there are filtered data holes in display memoryTo view symbolic values in a waveform display To display symbols for data valuesTo view symbolic values in a listing display Select the Cancel button To cancel the display processing of captured data100 You can use symbol names in place of data values when Using Symbols101 To reload object file symbols To load object file symbols102 Object file symbols are reloaded To adjust symbol values for relocated codeWhose symbols you wish to relocate To create user-defined symbolsTo replace user-defined symbols 104When entering label values in the trigger sequence To enter symbolic label valuesTo delete user-defined symbols To load user-defined symbolsGeneral-Purpose Ascii GPA Symbol File Format on To create an Ascii symbol file106 Create the reader.ini file on your workstation or PC ReadOnlyTicoffPage StabsTypeAppendTicoffPage Examples Example for Elf/StabsExample for Ticoff Example for Coff/Stabs using Ticoff reader109 You can print captured data from display tool windows Printing/Exporting Captured DataSelect the Read File button Select the file name and automatic file sequencing optionsIcon to view the imported data 111To cross-trigger with another instrument Cross-Triggering112 113 When the logic analyzer drives the arm signalTo test the logic analyzer hardware Solving Logic Analysis ProblemsTo test the logic analyzer hardware on 114System help volume Service Center for assistance115 To save logic analyzer configurations Saving and Loading Logic Analyzer ConfigurationsTo load logic analyzer configurations 116117 Using the Logic Analyzer in Eye Scan Mode118 Eye Scan tab lets you set up and run Eye Scan measurements Setting Up and Running Eye Scan MeasurementsTo select channels for the eye scan 119Scan Settings Subtab on To set the eye scan range and resolution120 To run an eye scan measurement To quickly set up another measurement using the scale seeTo set advanced eye scan options 121Advanced Subtab on To set up qualified eye scan measurements122 Memory device versus a memory controller Requirements Signal Timing Burst Transfers123 Burst Has adjustable sampling positions on each input channelAfter the rising edge of the clock Before the clock edge to after itAre supported Clock cycle of the next burst125 126 127 Be sure that the thresholds are set correctlyNot already expanded For correct state mode acquisitionsStart your target system and select Run Eye Finder Display129 Now, set up eye scan mode130 Select the Eye Scan tab Select the Qualifier subtab131 Select the Qualify eye scan sampling using... buttonTo comment on the eye scan settings To open the Eye Scan display Displaying Captured Eye Scan Data133 Tool To select the channels displayedWithin the data captured on the bus 134Scale tab, you can To scale the Eye Scan displayTo use the scaling options Eye Scan display window, select the Scale tabTo set Eye Scan display options To quickly set up another measurement using the scaleTo clear the captured eye scan data To open the Eye Scan display on137 138 139 140 To change the Eye Scan color scaleMake measurements on the eye scan data on Is zero by default141 About the captured measurement data To make measurements on the eye scan data142 143 144 145 146 147 148 Scroll bars to navigate through the information To display information about the eye scan dataEye Scan display window, select the Info tab 149150 Info tab, you can151 To comment on the eye scan dataSaving and Loading Captured Eye Scan Data Loading Logic Analyzer Configurations on152 153 Sampling Tab on Format Tab on Trigger Tab on154 Sampling tab lets you choose between the logic analyzers Sampling Tab155 Conventional Transitional Timing ModeAcquisition 156Will be stored How Samples are Stored in Transitional TimingPeriod and other times more than two sample periods apart Samples with transitionsState Speed State Mode158 159 Sampling Positions DialogFile menu Lets you save/load eye finder data Sampling Positions Tab160 Display Area Label buttonsSampling Position 161How the Suggested Position Behaves How the Selected Position BehavesXX% complete Cannot run the Eye Finder at this timeCharacterizer cannot be loaded Cannot run the Logic Analyzer at this timeComplete Date 163Select one or more labels in the Eye Finder Setup tab This channel appears to be completely quiet Timeout N K clocks in 5 secTwo common possibilities exist 165See individual channels for messages Run Eye Finder to characterize this channelStable region extends beyond the limits of the display 166Disk is probably full Numerical value for the item XXX could not be readFile Name already exists. Overwrite? Failed to open file for reading/writing NameInvalid true/false flag Unsupported revision level AA.BB169 Eye Finder Setup Tab170 Eye Finder Advanced Settings Dialog171 File Info TabReload Eye Scan ModeSave Save As173 Selecting the Eye Scan Mode onFormat Tab Expander cards which cannot be used in the clock setupData Specify the logic analyzer pod and clock threshold voltagesName Pod Assignment DialogType Pods176 Trigger Tab177 Trigger Functions Subtab178 General Timing Trigger Functions179 180 General State Trigger Functions181 Find pattern1 eventually followed by pattern2182 183 Advanced Trigger Functions184 State Trigger Functions Turbo State Trigger FunctionsAdvanced pattern1 or pattern2 Searched for186 187 Half Channel State Trigger FunctionsCount Settings SubtabIntermodule Control 188This tab gives a picture of the trigger sequence Overview Subtab189 Event Specification List Default Storing SubtabAt start Acquisition Group eventsSave/Recall Subtab Status Subtab191 192 Creating trigger function librariesTwo kinds of symbols are available Symbols TabThat you use to set up resource terms Multiple files194 Object file versions See AlsoMatching Symbols Symbols Selector Dialog195 Offset By Option Search PatternAddress masking is done by the Align to x Byte option Align to x Byte Option Symbol File FormatsByte option allows you to mask off an address Qualifies any address from 100C through 100F107 file General-Purpose Ascii GPA Symbol File Format198 Format GPA Record Format Summary199 Definitions in the file Records200 Symbol representing the function name Symbol representing the name of the sectionFirst address of the section, in hexadecimal Last address of the section, in hexadecimalName of a file You can specify symbols for variables usingNumber of a line in the file, in decimal 202203 CommentsLabels Subtab Eye Scan TabExpand Collapse Shows labels only Select All Selects all channelsRun Mode Scan Settings SubtabScan Range Time206 Advanced SubtabMedium ShortLong CustomQualification Qualifier SubtabClock Edge to Sample Names for209 Comments SubtabCalibration Instructions Calibration TabCalibration Status Calibration Messages211 Error MessagesGeneral Guidelines Branch expression is too complex212 213 Specific Guidelines 200 Mb/s State and all Timing ModesThis one may If the following sequence does not compileSpecific Guidelines 400 Mb/s State Modes 214215 Specific Guidelines 1250/1500 Mb/s State Mode Specific Guidelines 800 Mb/s State Mode216 217 Hardware Initialization Failed Goto action specifies an undefined levelPossible Causes Last sequence level calls goto nextMust assign another pod pair to specify actions for flags Maximum of 32 Channels Per LabelNo more Edge/Glitch resources available for this pod pair Timing sampling mode, flags are are always availableNo more Pattern resources available for this pod pair Possible SolutionsPhrase some of the edges as patterns 220Slow or Missing Clock No Trigger action found in the trace specification221 222 Trigger function initialization failureTrigger Specification is too complex Trigger inhibited during timing prestoreThen the approximate time is 32 seconds 223Event Combiner resource allocation guidelines224 Misaligned boundaries for addresses Waiting for Trigger225 226 To save a trigger setup onOperating temperature 0 to 45 degrees C Specifications and CharacteristicsProbes 227E5379A Differential Probe Specifications Characteristics E5378A Single-Ended Probe Specifications CharacteristicsAll specifications are marked by * asterisk E5378A Input Equivalent Circuit229 E5379A Input Equivalent CircuitE5380A Input Equivalent Circuit 1500 Mb/s Sampling Mode Specifications and Characteristics230 231 Characteristics232 233 400 Mb/s Sampling Mode Specifications Characteristics234 200 Mb/s Sampling Mode Specifications CharacteristicsTransitional Timing Mode Specifications and Characteristics Conventional Timing Mode Specifications and CharacteristicsAll specifications are marked by * asterisk 235236 What is a Specification?What is a Function Test? What is a Characteristic?Referred to as an operational accuracy calibration 237238 239 ConceptsConveyor Belt Analogy Understanding Logic Analyzer Triggering240 241 Conveyor belt analogySequence Levels Summary of Triggering CapabilitiesNext Summary of Triggering Capabilities on Next Sequence Levels on243 Addr Data 244Boolean Expressions Edges BranchesRanges Next Ranges onOccurrence Counters and Global Counters FlagsNext Flags on Trigger Sequence for ModuleNext Timers on TimersAn example trigger sequence to set up this measurement is An edge followed by an edge with a time limitStorage Qualification Default StorageNext Storage Qualification on Needed250 Sequence Level StorageNext Strategies for Setting Up Triggers on Strategies for Setting Up TriggersTrigger Functions 251Pattern2 occurring immediately after Pattern1 Agilent 16715A trigger user interface252 Store range until pattern occurs Same trigger as If/Then statements253 Next Setting Up Complex Triggers on Setting Up Complex TriggersDocument Your Trigger Sequences Next Document Your Trigger Sequences onDifferent parts of the trigger to describe how they work ConclusionsNext Conclusions on Inline documentation on an Agilent logic analyzerTo accurately capture data on a bus Understanding State Mode Sampling Positions256 257 258 Window259 Understanding Eye Scan Measurements260 261 Using the Logic Analyzer in Eye Scan Mode on Voltage resolution that can be set is 1 mVAre multiple logic analyzer cards in a module in this case Measurements run simultaneously in parallelAsterisk * See edge terms, glitch, and labels Glossary263 264 Divided into 1K 64-state records265 Debug mode See monitor266 Ethernet address See link-level267 268 269 Module/probe interconnect cableProcessor probe See emulation By the channel width of the instrument270 271 Measurements272 273 274 275 Index251 276247 277122 278180 279280 Label values, symbolic, 105 labels, 22Positive logic 281242 282107 283Wait for other machine to trigger 284Publication Number 5988-9044EN January 1