Agilent Technologies 16760A specs

Chapter 3: Using the Logic Analyzer in Timing or State Mode

Displaying Captured Data

Capacitive Loading on the Device Under Test

the actual write to this variable. Although the instruction is prefetched, the analyzer can be set to only trigger when the write is executed.

Excessive capacitive loading can degrade signals, resulting in suspicious data or even system lockup. All analysis probes add capacitive loading, as can custom probes you design for your device under test. To reduce loading, remove as many pin protectors, extenders, and adapters as possible.

Careful layout of your device under test can minimize loading problems and result in better margins for your design. This is especially important for systems running at frequencies greater than 50 MHz.

If there are filtered data holes in display memory

When an analyzer measurement occurs, acquisition memory is filled with data that is then transferred to the display memory of the analysis or display tools you are using, as needed by those tools. In normal use, this demand driven data approach saves time by not transferring unnecessary data.

Since acquisition memory is cleared at the beginning of a measurement, stopping a run may create a discrepancy between acquisition memory and the memory buffer of connected tools. Without a complete trace of acquisition memory, the display memory will appear to have 'holes' in it which appear as filtered data.

This situation will occur in these cases:

•If you stop a repetitive measurement after analyzer data has been cleared and before the measurement is complete.

•If a trigger is not found by the analyzer and the run must be stopped to regain control.

To make sure all of the data in a repetitive run is available for viewing:

1.In the workspace, attach a Filter tool to the output of the analyzer.

2.In the Filter, select "Pass Matching Data"

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Agilent Technologies 16760A If there are filtered data holes in display memory, This situation will occur in these cases

Contents

Agilent Technologies 16760A Logic Analyzer Agilent Technologies. All rights reserved Agilent Technologies 16760A Logic Analyzer Captures input signals as low as 200 mV p-pSampling Mode on Probing Reference on Concepts on See Also Glossary see Contents Choosing the Sampling Mode 112 Using Symbols 101110 114 155 Displaying Captured Eye Scan Data152 Format Tab 174 211 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 mode If you chose Timing Mode If you chose State Mode If 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 voltages To assign names to logic analyzer channels NextDefined threshold voltage Select the Close button Timing Mode or State Mode Steps Define the trigger condition Run the measurement Next . Run the measurement on To 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 window Eye Scan Mode Steps Select channels for the eye scan measurement Set the eye scan range and resolution Next . Set the eye scan range and resolution on Run the eye scan measurement Next . Run the eye scan measurement on Display the captured eye scan data Next . Display the captured eye scan data on Eye 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 Test Numbers Single-ended signalNumber Either Using the E5379A Differential Probe Negative data inputs Or single-ended signalsIndependent threshold adjustment Reference voltage Using the E5380A Mictor-Compatible Probe Or AMP Using the E5382A Single-ended Flying Lead Probe Set Using an Analysis Probe Additional Accessories Probing the Device Under Test Choosing the Sampling Mode Selecting the Timing Mode Asynchronous Sampling To select the timing mode To select the conventional/transitional configuration To specify the sample period Sample rate is the inverse of the sample period To automatically adjust sampling positions on Selecting the State Mode Synchronous SamplingState Mode Sampling Position To manually adjust sampling positions on To select the state mode To select the state speed configuration To set up the sampling clock For the clock input signal that will be used Run 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 repetitively To 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 on To select the eye scan mode speed configuration Selecting the Eye Scan ModeTo select the eye scan mode High-speed or high-bandwidth oscilloscope To 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 Label Label 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 off Using 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 function To specify a label pattern event Timing only To enter symbolic label values on Symbols Selector Dialog on To specify a label edge event To expand a trigger function To compress a trigger function To load/unload trigger function libraries To copy trigger function libraries between systems Using Other Trigger Features To count time, states, or turn counting off Reduced by half in order to store the required time tags To specify default storingTo assign pods to the analyzer on If you chose Custom To 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 Off To insert sequence levels To insert/replace/delete sequence levelsTo clear the trigger sequence on To replace sequence levels To 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 subtab To specify a duration or occurrence count for events To specify a time duration for events timing only To insert a timer action To insert a store action state modeTo insert timer actions/events Available To insert a counter action To insert a timer eventTo insert counter actions/events To insert a counter event To insert flag actions/events To drive the Port Out signal with a flag To insert a flag event To 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 event To clear the trigger save/recall list To recall a trigger setupRunning Measurements To start/stop measurements Select the Stop or Stop All button If nothing happens when you start a measurementTo stop a measurement Waiting for Trigger on To view the trigger status Displaying Captured Data To open Waveform or Listing displays Windows Help volumeTo use other display tools Search for particular data values captured on labels Displaying 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 analyze If there are filtered data holes in display memory This situation will occur in these cases To 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 reloaded To replace user-defined symbols To create user-defined symbolsWhose symbols you wish to relocate 104 To delete user-defined symbols To enter symbolic label valuesWhen entering label values in the trigger sequence To load user-defined symbols 106 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/Stabs 109 Example for Coff/Stabs using Ticoff readerExample for Ticoff Printing/Exporting Captured Data You can print captured data from display tool windows Icon to view the imported data Select the file name and automatic file sequencing optionsSelect the Read File button 111 112 Cross-TriggeringTo cross-trigger with another instrument When the logic analyzer drives the arm signal 113 To test the logic analyzer hardware on Solving Logic Analysis ProblemsTo test the logic analyzer hardware 114 115 Service Center for assistanceSystem help volume To load logic analyzer configurations Saving and Loading Logic Analyzer ConfigurationsTo save logic analyzer configurations 116 Using the Logic Analyzer in Eye Scan Mode 117 118 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 119 120 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 121 122 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 it 125 Clock cycle of the next burstAre supported 126 Be sure that the thresholds are set correctly 127 Start your target system and select Run Eye Finder For correct state mode acquisitionsNot already expanded Display Now, set up eye scan mode 129 Select the Eye Scan tab Select the Qualifier subtab 130 Select the Qualify eye scan sampling using... button 131 To 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 134 To use the scaling options To scale the Eye Scan displayScale tab, you can Eye Scan display window, select the Scale tab To 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 on 137 138 139 To change the Eye Scan color scale 140 141 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 149 Info tab, you can 150 To comment on the eye scan data 151 152 Loading Logic Analyzer Configurations onSaving and Loading Captured Eye Scan Data Sampling Tab on Format Tab on Trigger Tab on 153 154 155 Sampling TabSampling tab lets you choose between the logic analyzers Acquisition Timing ModeConventional Transitional 156 Period and other times more than two sample periods apart How Samples are Stored in Transitional TimingWill be stored Samples with transitions 158 State ModeState Speed Sampling Positions Dialog 159 160 Sampling Positions TabFile menu Lets you save/load eye finder data Sampling Position Label buttonsDisplay Area 161 XX% complete How the Selected Position BehavesHow the Suggested Position Behaves Cannot run the Eye Finder at this time Complete Date Cannot run the Logic Analyzer at this timeCharacterizer cannot be loaded 163 Select 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 165 Stable region extends beyond the limits of the display Run Eye Finder to characterize this channelSee individual channels for messages 166 Numerical value for the item XXX could not be read Disk is probably full Invalid true/false flag Failed to open file for reading/writing NameFile Name already exists. Overwrite? Unsupported revision level AA.BB Eye Finder Setup Tab 169 Eye Finder Advanced Settings Dialog 170 File Info Tab 171 Save Eye Scan ModeReload Save As Selecting the Eye Scan Mode on 173 Data Expander cards which cannot be used in the clock setupFormat Tab Specify the logic analyzer pod and clock threshold voltages Type Pod Assignment DialogName Pods Trigger Tab 176 Trigger Functions Subtab 177 General Timing Trigger Functions 178 179 General State Trigger Functions 180 Find pattern1 eventually followed by pattern2 181 182 Advanced Trigger Functions 183 184 Advanced pattern1 or pattern2 Turbo State Trigger FunctionsState Trigger Functions Searched for 186 Half Channel State Trigger Functions 187 Intermodule Control Settings SubtabCount 188 189 Overview SubtabThis tab gives a picture of the trigger sequence At start Acquisition Default Storing SubtabEvent Specification List Group events 191 Status SubtabSave/Recall Subtab Creating trigger function libraries 192 That you use to set up resource terms Symbols TabTwo kinds of symbols are available Multiple files Object file versions See Also 194 195 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 100F 198 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 hexadecimal Number of a line in the file, in decimal You can specify symbols for variables usingName of a file 202 Comments 203 Expand Eye Scan TabLabels Subtab Collapse Shows labels only Select All Selects all channels Scan Range Scan Settings SubtabRun Mode Time Advanced Subtab 206 Long ShortMedium Custom Clock Edge to Sample Qualifier SubtabQualification Names for Comments Subtab 209 Calibration Status Calibration TabCalibration Instructions Calibration Messages Error Messages 211 212 Branch expression is too complexGeneral Guidelines Specific Guidelines 200 Mb/s State and all Timing Modes 213 Specific Guidelines 400 Mb/s State Modes If the following sequence does not compileThis one may 214 215 216 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 next No 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 available Phrase some of the edges as patterns Possible SolutionsNo more Pattern resources available for this pod pair 220 221 No Trigger action found in the trace specificationSlow or Missing Clock Trigger function initialization failure 222 Then the approximate time is 32 seconds Trigger inhibited during timing prestoreTrigger Specification is too complex 223 224 Combiner resource allocation guidelinesEvent 225 Waiting for TriggerMisaligned boundaries for addresses To save a trigger setup on 226 Probes Specifications and CharacteristicsOperating temperature 0 to 45 degrees C 227 All specifications are marked by * asterisk E5378A Single-Ended Probe Specifications CharacteristicsE5379A Differential Probe Specifications Characteristics E5378A Input Equivalent Circuit E5379A Input Equivalent Circuit 229 230 1500 Mb/s Sampling Mode Specifications and CharacteristicsE5380A Input Equivalent Circuit Characteristics 231 232 400 Mb/s Sampling Mode Specifications Characteristics 233 200 Mb/s Sampling Mode Specifications Characteristics 234 All specifications are marked by * asterisk Conventional Timing Mode Specifications and CharacteristicsTransitional Timing Mode Specifications and Characteristics 235 What is a Specification? 236 Referred to as an operational accuracy calibration What is a Characteristic?What is a Function Test? 237 238 Concepts 239 240 Understanding Logic Analyzer TriggeringConveyor Belt Analogy Conveyor belt analogy 241 Next Summary of Triggering Capabilities on Summary of Triggering CapabilitiesSequence Levels Next Sequence Levels on 243 244 Addr Data Boolean Expressions Ranges BranchesEdges Next Ranges on Next Flags on FlagsOccurrence Counters and Global Counters Trigger Sequence for Module An example trigger sequence to set up this measurement is TimersNext Timers on An edge followed by an edge with a time limit Next Storage Qualification on Default StorageStorage Qualification Needed Sequence Level Storage 250 Trigger Functions Strategies for Setting Up TriggersNext Strategies for Setting Up Triggers on 251 252 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 on Next Conclusions on ConclusionsDifferent parts of the trigger to describe how they work Inline documentation on an Agilent logic analyzer 256 Understanding State Mode Sampling PositionsTo accurately capture data on a bus 257 Window 258 Understanding Eye Scan Measurements 259 260 261 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 parallel 263 GlossaryAsterisk * See edge terms, glitch, and labels Divided into 1K 64-state records 264 Debug mode See monitor 265 Ethernet address See link-level 266 267 268 Module/probe interconnect cable 269 270 By the channel width of the instrumentProcessor probe See emulation Measurements 271 272 273 274 Index 275 276 251 277 247 278 122 279 180 Label values, symbolic, 105 labels, 22 280 281 Positive logic 282 242 283 107 284 Wait for other machine to trigger Publication Number 5988-9044EN January 1