Agilent Technologies 1690, 1680 manual Theory of Operation, 159

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8

Theory of Operation

This chapter tells the theory of operation for the logic analyzer and describes the self-tests.

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Contents Agilent Technologies 1680/90-Series Logic Analyzer Agilent 1680/90-Series Logic Analyzer-At a Glance FeaturesService Strategy This Book Contents To test the multiple-clock state acquisition Troubleshooting Theory of Operation General Information Accessories Supplied Agilent Part Number AccessoriesChannel Count SpecificationsCharacteristics Full ChannelProbes Dimensions Equipment Required Recommended Test EquipmentPreparing for Use To inspect the logic analyzer Power RequirementsTo connect the 1690A,AD-series logic analyzer to a host PC To apply powerTo clean the logic analyzer To start the user interfaceTo test the logic analyzer Testing Performance Test Interval To make the test connectors Materials Required DescriptionQty To make the test connectors Pulse Generator Setup Timebase Channel Trigger To set up the test equipment and the logic analyzerSet up the test equipment Equipment Required Critical SpecificationsSet up the 1680A,AD-series logic analyzer Oscilloscope Setup Acquisition Display Trigger Shift ∆ TimeChannel Define meas To perform the logic analyzer self-tests Set up the 1690A,AD-series logic analyzerSet the reporting level Click Close to close the Analysis System Self Tests dialog To test the threshold accuracy Set up the equipmentConnect and configure the logic analyzer Test the ECL Threshold Test the 0 V User Threshold Test the next pod To set up the logic analyzer for the state mode tests To set up the logic analyzer for the state mode tests Click OK to close the Value dialog To set up the logic analyzer for the state mode tests To test the single-clock, single-edge, state acquisition Channel 1 Output Combinations Channel 2 OutputCombination Channel 2 Output Verify the test signal Setup/Hold Combinations Test Sample Position Times Window Check the setup/hold combinationTo test the single-clock, single-edge, state acquisition Following clock configurations will be used in steps 4, 5, To test the single-clock, single-edge, state acquisition Following clock configurations will be used in steps 9, 10 To test the single-clock, single-edge, state acquisition Test the next channels 1680/81A,AD and 1690/91A,AD To test the multiple-clock state acquisition 1680A, AD or 1690A, AD only 1682A, AD or 1692A, AD only Verify the test signal 2.0 ns 4.50 ns +3.0 ns To test the multiple-clock state acquisition To test the multiple-clock state acquisition Enable the pulse generator channel 1 Comp with the LED on Test the next channels 1680/81A, AD and 1690/91A, AD To test the single-clock, multiple-edge, state acquisition Modify the following pulse generator settings1680A,AD or 1690A,AD only Pod 2, channel 1682A,AD or 1692A,AD only Pod 1, channel Verify the test signal Check the setup/hold with single clock, multiple clock edges To test the single-clock, multiple-edge, state acquisition Following clock configurations will be used in steps 3, 4, To test the single-clock, multiple-edge, state acquisition Test the next channels 1680/81A,AD and 1690/91A,AD To test the time interval accuracy Function Generator Setup To test the time interval accuracy Click the Run icon to fill acquisition memory Acquire and verify the test dataTo test the time interval accuracy Accuracy Test Settings Results Self-TestsPerformance Test Record ThresholdPerformance Test Record Settings Results Edge AcquisitionMultiple-Clock Multiple-Edge Acquisition Time Interval Performance Test Record Settings Results Single-ClockPerformance Test Record Calibrating and Adjusting Logic analyzer calibration Troubleshooting To install the fan guard To use the flowcharts Start Troubleshooting the Agilent 1680A,AD-seriesReplace Power supply Are both instrument Yes Possible problem with LCD display, inverter, or cables Does the blue Uninstall, then reinstall Agilent Logic Analyzer application Possible problem with To test the power supply voltages To check the power-up testsPin Voltage Power Supply VoltagesTo test the LCD display signals To test disk drive voltages Equipment Required Critical SpecificationDisk Drive Voltages Pin No Signal To verify the CD-ROM Disk Drive Voltages Pin Signals Pin NoTo reinstall the operating system To recover the operating systemProblems with the Operating System Troubleshooting the Agilent 1690A,AD-series Yes Is the power cord Connected? Consult host PC Test pass? Task Manager To verify connectivity100 Device Manager101 102 General Troubleshooting To run the self-tests103 104 105 106 Acquisition board status LEDs107 To test the logic analyzer probe cables108 109 110 To check the BNC Trigger input/output signals111 On the DC source, enter a voltage setting of 3.000112 To test the auxiliary powerDigital Multimeter 005% accuracy113 Replacing Assemblies114 1680A,AD-series disassembly/assemblyPrepare the instrument for disassembly To remove the chassis from the sleeve115 To remove the acquisition board116 117 To remove the power supply118 To remove the hard disk drive119 To remove the CD-ROM drive assembly120 To remove the flexible disk drive121 122 To remove the PCI boards123 To remove the motherboard124 Transfer the I/O panel to the replacement board125 126 To remove the front panel assembly127 Reverse this procedure to install the front panel assembly128 To disassemble the front panel assembly129 To remove the distribution board130 To remove the inverter board131 To remove the fans132 To remove the cable tray133 1690A,AD-series disassembly/assembly134 To remove the fascia135 Remove the fascia away from the front panel136 137 To remove the deck138 139 140 To remove the line filter141 To remove the front panel and front frame142 143 Replaceable Parts144 Replaceable Parts OrderingReplaceable Parts List See Also145 Exploded View 147 Agilent 1680A,AD-Series Replaceable PartsReplaceable Parts Ref. Des Exchange Assemblies148 0515-0372149 150 151 Front Panel Assembly152 Exploded View 154 Agilent 1690A,AD-Series Replaceable Parts155 156 157 Power Cables and Plug ConfigurationsPlug Type Cable Plug Description Length Color Country In/cm 158159 Theory of OperationBlock-Level Theory Agilent 1680A,AD-Series Logic Analyzer Block Diagram 160161 Agilent 1680A,AD-series Logic Analyzer Theory162 Power SupplyLogic Acquisition Board Block Diagram Acquisition Board163 164 Power Distribution Board Front Panel Board165 166 Agilent 1690A,AD-series Logic Analyzer Theory167 Power-up Self-Tests 1680A,AD-seriesSelf-Tests Descriptions Connectivity Tests 1690A,AD-series168 Acquisition Board Self Tests169 Logic Analyzer Self-Tests170 171 172 Manual Part Number Technology Licenses

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