Agilent Technologies 1690 manual Agilent 1680A,AD-series Logic Analyzer Theory, 161

Page 161

Chapter 8: Theory of Operation

Agilent 1680A,AD-series Logic Analyzer Theory

Agilent 1680A,AD-series Logic Analyzer Theory

PC Motherboard. The Agilent 1680A,AD-series benchtop analyzer is built around an x86 ATX motherboard. The motherboard serves as the system backplane through PCI slots and IEEE 1394 ports. The hard drive, flexible disk drive, and communications ports are all integrated into the 1680A,AD-series logic analyzer through the PC motherboard. PCI slots are used to house LAN, video, and the IEEE 1394 interface.

PC Software System. The user interface and I/O run on the PC motherboard under Microsoft Windows ® 2000 Professional operating system. This is the primary software system. Windows ® 2000 Professional operating system. This is the primary software system. Windows ® 2000 Professional provides all the graphics drivers needed to create the front panel interface as well as providing all of the software necessary to access the disk drives, to drive printers, and to process input from pointing devices and the keyboard. Standard Windows ® drivers are also used for I/O boards installed in the PCI slots and devices connected to LAN, video, and the IEEE 1394 interface.

Disk Drives. The Agilent 1680A,AD-series logic analyzer contains a 3.5” hard disk drive as well as a 3.5” micro flexible disk drive.

Flat Panel Display. The Agilent 1680A,AD-series logic analyzer includes an active matrix thin flim transistor (AM-TFT) liquid crystal color flat panel display (LCD). The LCD had a resolution of 800 x 600 (SVGA resolution) that measures 12.1 diagonally.

Luminance is software selectable at either 60% luminance or 100% luminance. The display’s luminance is controlled from the user interface by sending commands to the IEEE 1394 processor which in turn sends commands to the front panel microcontroller where luminance is controlled. This board plugs into a PCI slot on the PC motherboard and has a cable that drives the display.

An inverter is used to provide power to the two fluorescent lamps that make up the backlight of the liquid crystal display. The inverter’s output voltage is derived from a +12 V input. The inverter is a separate OEM component that is powered from the power distribution board.

A custom SVGA display board plugs into a PCI slot. The SVGA board drives the flat panel display and can also drive a standard external CRT display.

Networking. Networking is accomplished using an OEM board that plugs into a PCI slot.

Other I/O. The parallel port, audio port, keyboard port, mouse port, serial port, and USB ports are all integrated onto the motherboard.

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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 AccessoriesCharacteristics SpecificationsFull Channel Channel CountProbes 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 test the logic analyzer To clean the logic analyzerTo start the user interface Testing Performance Test Interval Qty To make the test connectorsMaterials Required Description To make the test connectors Set up the test equipment To set up the test equipment and the logic analyzerEquipment Required Critical Specifications Pulse Generator Setup Timebase Channel TriggerChannel Define meas Set up the 1680A,AD-series logic analyzerOscilloscope Setup Acquisition Display Trigger Shift ∆ Time 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 Performance Test Record Test Settings Results Self-TestsThreshold AccuracyMultiple-Clock Multiple-Edge Acquisition Performance Test Record Settings ResultsEdge 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 102 103 General TroubleshootingTo run the self-tests 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 3.000Digital Multimeter To test the auxiliary power005% accuracy 112113 Replacing AssembliesPrepare the instrument for disassembly 1680A,AD-series disassembly/assemblyTo remove the chassis from the sleeve 114115 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 Ordering145 Replaceable Parts ListSee Also Exploded View Replaceable Parts Ref. Des Agilent 1680A,AD-Series Replaceable PartsExchange Assemblies 147148 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 TheoryLogic Acquisition Board Block Diagram Power SupplyAcquisition Board 162163 164 165 Power Distribution BoardFront Panel Board 166 Agilent 1690A,AD-series Logic Analyzer TheorySelf-Tests Descriptions Power-up Self-Tests 1680A,AD-seriesConnectivity Tests 1690A,AD-series 167168 Acquisition Board Self Tests169 Logic Analyzer Self-Tests170 171 172 Manual Part Number Technology Licenses
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