Agilent Technologies 1680 manual Agilent 1690A,AD-series Logic Analyzer Theory, 166

Page 166

Chapter 8: Theory of Operation

Agilent 1690A,AD-series Logic Analyzer Theory

Agilent 1690A,AD-series Logic Analyzer Theory

Acquisition Board

The Agilent 1690A,AD-series logic analyzers utilize the same acquisition board as the 1680A,AD-series benchtop logic analyzers. The motherboard interface connects directly to the IEEE 1394 port on the host PC.

Power Supply

A low voltage power supply provides all the DC voltages needed to operate the logic analyzer acquisition board. The power supply also provides the +5V VDC voltage to the probe cables to power the logic analyzer accessories and analysis probes.

Unfiltered voltages of +12V, +5V, -5.2V, and +3.4 are supplied to the power distribution board where they are filtered and distributed to other boards and components in the system.

Power Distribution Board

The power distribution board connects directly to the power supply and distributes power to the rest of the system. The power distribution board has circuitry for regulating fan voltage that is temperature dependent as well as detecting when a fan ceases to spin.

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Contents Agilent Technologies 1680/90-Series Logic Analyzer Features Agilent 1680/90-Series Logic Analyzer-At a GlanceService Strategy This Book Contents To test the multiple-clock state acquisition Troubleshooting Theory of Operation General Information Accessories Accessories Supplied Agilent Part NumberFull Channel SpecificationsCharacteristics Channel CountProbes Dimensions Recommended Test Equipment Equipment RequiredPreparing for Use Power Requirements To inspect the logic analyzerTo apply power To connect the 1690A,AD-series logic analyzer to a host PCTo start the user interface To clean the logic analyzerTo test the logic analyzer Testing Performance Test Interval Materials Required Description To make the test connectorsQty To make the test connectors Equipment Required Critical Specifications To set up the test equipment and the logic analyzerSet up the test equipment Pulse Generator Setup Timebase Channel TriggerOscilloscope Setup Acquisition Display Trigger Shift ∆ Time Set up the 1680A,AD-series logic analyzerChannel Define meas Set up the 1690A,AD-series logic analyzer To perform the logic analyzer self-testsSet the reporting level Click Close to close the Analysis System Self Tests dialog Set up the equipment To test the threshold accuracyConnect 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 Combinations Channel 2 Output Channel 1 OutputCombination Channel 2 Output Verify the test signal Check the setup/hold combination Setup/Hold Combinations Test Sample Position Times WindowTo 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 Modify the following pulse generator settings To test the single-clock, multiple-edge, state acquisition1680A,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 Acquire and verify the test data Click the Run icon to fill acquisition memoryTo test the time interval accuracy Threshold Test Settings Results Self-TestsPerformance Test Record AccuracyEdge Acquisition Performance Test Record Settings ResultsMultiple-Clock Multiple-Edge Acquisition Performance Test Record Settings Results Single-Clock Time IntervalPerformance Test Record Calibrating and Adjusting Logic analyzer calibration Troubleshooting To install the fan guard To use the flowcharts Troubleshooting the Agilent 1680A,AD-series StartReplace 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 check the power-up tests To test the power supply voltagesPower Supply Voltages Pin VoltageTo test the LCD display signals Equipment Required Critical Specification To test disk drive voltagesDisk Drive Voltages Pin No Signal Disk Drive Voltages Pin Signals Pin No To verify the CD-ROMTo recover the operating system To reinstall the operating systemProblems with the Operating System Troubleshooting the Agilent 1690A,AD-series Yes Is the power cord Connected? Consult host PC Test pass? To verify connectivity Task ManagerDevice Manager 100101 102 To run the self-tests General Troubleshooting103 104 105 Acquisition board status LEDs 106To test the logic analyzer probe cables 107108 109 To check the BNC Trigger input/output signals 110On the DC source, enter a voltage setting of 3.000 111005% accuracy To test the auxiliary powerDigital Multimeter 112Replacing Assemblies 113To remove the chassis from the sleeve 1680A,AD-series disassembly/assemblyPrepare the instrument for disassembly 114To remove the acquisition board 115116 To remove the power supply 117To remove the hard disk drive 118To remove the CD-ROM drive assembly 119To remove the flexible disk drive 120121 To remove the PCI boards 122To remove the motherboard 123Transfer the I/O panel to the replacement board 124125 To remove the front panel assembly 126Reverse this procedure to install the front panel assembly 127To disassemble the front panel assembly 128To remove the distribution board 129To remove the inverter board 130To remove the fans 131To remove the cable tray 1321690A,AD-series disassembly/assembly 133To remove the fascia 134Remove the fascia away from the front panel 135136 To remove the deck 137138 139 To remove the line filter 140To remove the front panel and front frame 141142 Replaceable Parts 143Replaceable Parts Ordering 144See Also Replaceable Parts List145 Exploded View Exchange Assemblies Agilent 1680A,AD-Series Replaceable PartsReplaceable Parts Ref. Des 1470515-0372 148149 150 Front Panel Assembly 151152 Exploded View Agilent 1690A,AD-Series Replaceable Parts 154155 156 Power Cables and Plug Configurations 157158 Plug Type Cable Plug Description Length Color Country In/cmTheory of Operation 159Agilent 1680A,AD-Series Logic Analyzer Block Diagram 160 Block-Level TheoryAgilent 1680A,AD-series Logic Analyzer Theory 161Acquisition Board Power SupplyLogic Acquisition Board Block Diagram 162163 164 Front Panel Board Power Distribution Board165 Agilent 1690A,AD-series Logic Analyzer Theory 166Connectivity Tests 1690A,AD-series Power-up Self-Tests 1680A,AD-seriesSelf-Tests Descriptions 167Acquisition Board Self Tests 168Logic Analyzer Self-Tests 169170 171 172 Manual Part Number Technology Licenses

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