To-A Converter | Agilent Technologies E3632A manual

Chapter 4 Theory of Operation

D-to-A Converter

D-to-A Converter

Referring to the schematic shown on page 123, all reference voltages of power circuits are derived from the internal voltage reference of system DAC U21. The system DAC track/hold amplifier outputs are used to provide controllable reference voltages to three power circuits. The system DAC is programmed and responds to the main controller via internal 3-wire serial data bus SERCLK, SERRBK, and SERSTB. The system DAC is mutiplexed to 6 track/hold amplifiers through U27. Each track/hold amplifier is refreshed approximately every 1 msec to maintain its output setting. Changes to track/hold amplifier outputs are accomplished by dwelling on that position for an extended period.

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Agilent Technologies E3632A manual Theory of Operation To-A Converter

Contents

3DUW1XPEHU $SULO Service Guide Flexible system features Convenient bench-top features Front Panel at a Glance Before performing calibration T e Front-Panel Voltage and Current Limit Settings OVP Display Annunciators Key to Rear Panel at a Glance This Book Page Contents Theory of Operation Contents Service Contents Specifications Specifications Specifications Performance Specifications Performance Specifications OVP Specifications Supplemental Characteristics Supplemental Characteristics Opt 0E3 Dimensions of Agilent E3632A Power Supply Specifications Supplemental Characteristics Quick Start Quick Start Quick Start To Prepare the Power Supply for Use To Prepare the Power Supply for UseConnect the power cord and turn on the power supply Enable the outputs 100 or 115 Vac, 4 AT fuse 230 Vac, 2.5 AT fuse Quick Start To Check the Rated Voltages of the Power Supply To Check the Rated Voltages of the Power SupplyTurn on the power supply Quick Start To Check the Rated Currents of the Power Supply To Check the Rated Currents of the Power SupplyAdjust the voltage limit value to 1.0 volt Page Set the display for the limit mode To Use the Power Supply in Constant Voltage ModeAdjust the knob for the desired current limit Connect a load to the desired output terminals Return to the meter mode T e Adjust the knob for the desired output voltage Adjust the knob for the desired voltage limit To Use the Power Supply in Constant Current ModeConnect a load to the output terminals Verify that the power supply is in the constant current mode T e Adjust the knob for the desired output current To Store and Recall the Instrument State Restore the operating state Turn on the recall modeDone Recall To Program Overvoltage Protection Setting the OVP Level and Enable the OVP Circuit Move to the clear mode Ovp on Readjust the OVP trip level or the output voltage levelChecking OVP Operation Clearing the Overvoltage Condition Clear the overvoltage condition and exist this menu To Program Overcurrent Protection Setting the OCP Level and Enable the OCP Circuit Move to the clear mode Ocp on Readjust the OCP trip level or the output current levelChecking OCP Operation Clearing the Overcurrent Condition Quick Start To Rack Mount the Power Supply To Rack Mount the Power Supply Calibration Procedures Calibration Procedures Calibration Interval Agilent Technologies Calibration Services Calibration Procedures Automating Calibration Procedures Automating Calibration ProceduresRecommended Test Equipment Test Considerations U t i o n Calibration Procedures Test Considerations Performance Verification Tests Calibration Procedures Performance Verification TestsSelf-Test Performance Verification Tests Measurement Techniques Setup for Most Tests General Measurement Techniques Calibration Procedures Constant Voltage CV Verifications Constant Voltage Test SetupConstant Voltage CV Verifications Voltage Programming and Readback Accuracy CV Line Regulation CV Load RegulationVolt Normal Mode Voltage Noise CV Ripple and Noise Load Transient Response Time Calibration Procedures Constant Current CC Verifications Constant Current Test SetupConstant Current CC Verifications Current Programming and Readback Accuracy Curr CC Load Regulation CC Line Regulation Normal Mode Current Noise CC Ripple and Noise Calibration Procedures Common Mode Current Noise Common Mode Current Noise CV Performance Test Record Performance Test Record for Agilent E3632ACC Performance Test Record Calibration Security Code Calibration Procedures Calibration Security Code Turn on the front-panel calibration mode To Unsecure the Power Supply for CalibrationMove to the security code by pressing the Secure key Turn off the calibration mode To Unsecure the Power Supply Without the Security Code Calibration Count Calibration Procedures Calibration CountCalibration Message General Calibration/Adjustment Procedure Voltage and OVP Calibration Move down a level to the voltage calibration modeCalibrate DAC and select the low voltage calibration point Lo +0.5000 Current and OCP Calibration Hi 28.995 Select the low current calibration point Lo 0.200 a Mi 3.499 a Aborting a Calibration in Progress Turn off the power supply to exit the calibration mode Calibration Record for Agilent E3632A Calibration Procedures Calibration Record for Agilent E3632A Calibration Procedures Error Messages Error MessagesSystem Error Messages Self-Test Error MessagesPage Calibration Program Calibration Procedures Calibration Program Clear Screen Print TABXY10,7,BEGIN DAC Error Correction Else Print TABXY10,7,BEGIN CURRENT/OCP Calibration Print TABXY10,5,CURRENT/OCP Calibration Complete End of Program Theory of Operation Theory of Operation Theory of Operation Block Diagram Overview Block Diagram Overview Block Diagram Theory of Operation AC Input and Bias Supplies AC Input and Bias Supplies Theory of Operation Floating Logic Floating Logic Serck Xfpsk Theory of Operation To-A Converter To-A Converter Theory of Operation To-D Converter To-D Converter Theory of Operation Power Mesh and Control Power Mesh and Control Theory of Operation Power Mesh and Control Front Panel Earth-Referenced LogicTheory of Operation Earth-Referenced Logic Service Service Is the Power Supply Inoperative? Operating ChecklistDoes the Power Supply Fail Self-Test? Service Operating Checklist Standard Repair Service worldwide Types of Service AvailableService Types of Service Available Express Exchange U.S.A. only Repacking for Shipment Service Repacking for Shipment To Replace the Power-Line Fuse Electrostatic Discharge ESD PrecautionsService Electrostatic Discharge ESD Precautions Surface Mount Repair Installation Procedure To Disconnect the Output Using an External RelayService To Disconnect the Output Using an External Relay Unit Reports Errors 740 to Troubleshooting HintsU t i o n Service Troubleshooting Hints Unit is Inoperative Service Troubleshooting Hints Bias Supplies Problems Power-On Self-Test Self-Test ProceduresService Self-Test Procedures Complete Self-Test ±10% tolerance Service Self-Test Procedures 100 Replaceable Parts To Order Replaceable Parts KMG1H222H E3632-60002 Main PC Assembly Replaceable Parts E3632-60002 Main PC Assembly 105 106 107 108 109 110 Agilent Part Qty Description Mfr Mfr Part Number Code E3632-60004 Front Panel Display PC Assembly E3632A Power SupplyAssembly E3632-60005 Front Frame Assembly Mfr Code Manufacturer’s Name Manufacturer’s List 114 Backdating Lqfoxghglqwklvfkdswhu Schematics ‡ $&DQG$&6\VWHP6FKHPDWLFSDJH ‡ &RPSRQHQW/RFDWRU0DLQ%RDUGSDJH‡ &RPSRQHQW/RFDWRUURQWSDQHOSDJH Page Page Page Page Page Page Page Page Warranty