Theory of Operation | Agilent Technologies 85330A specification

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Service

Theory of Operation

Theory of Operation

The 85330A multiple channel controller was designed as a high-speed, real-time controller for the 8530A microwave receiver. The 85330A controls external solid-state transmit and receive switches and allows for asynchronous TTL communications to the receiver, the RF and LO sources, and other remote 85330As. It is implemented using a standard VXI mainframe and has a downloadable software driver that provides the controllers with their own GPIB command set for control, setup, and initiating runtime sequences.

A diagram of the entire system is shown in the Figure 9-1, “85330A System Block Diagram,” next. All of the connections from the 85330-60002 card’s rear panel to other instruments are optional and may be different for each system, depending on the system’s requirements from the 85330A.

A receiver may use the STOP SWEEP line, if the RCVR READY line is not available.

The 85330A was implemented using an Agilent 75000 Series B VXI mainframe. A special VXI card was developed to handle the necessary control and timing requirements. This card is driven by a standard VXI parallel interface card (Digital I/O card.) A downloadable software driver was developed to provide fast runtime control of the measurement system.

9-2	85330A Multiple Channel Controller

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Agilent Technologies 85330A service manual Theory of Operation

Contents

Agilent Technologies 85330A Multiple Channel Controller Restricted Rights Legend What You’ll Find in This Manual… Chapter Warranty Certiﬁcation Documentation Warranty Assistance Service and Support Europe Safety and Regulatory Information Instrument Markings Safety Earth Ground Viii Manufacturers Declaration Sound Emmisions Declaration of Conformity Typeface Conventions Xii Contents Operator’s Check Manual Operation Case of Difficulty Accessory Documentation Glossary Xviii85330A Multiple Channel Controller Installation Installation at a Glance Installing the Agilent 85330A Multiple Channel Controller How to use the ﬁgurePreparing the Main Antenna Measurement System Choosing the Proper Conﬁguration Flow Chart for Choosing the Correct Installation 85330A Installation Diagram for 8530A Source Control 85330A Installation Diagram for Fast TTL Source Control Checking Operation of the Multiple Channel Controller Loading the Driver from a Personal ComputerEquipment Needed Procedure Ibasic is only present if the Ibasic option is installed Selecting Positive or Negative-Edge Event Triggers Refer to -4 on Positive/Negative-Edge Event Trig jumpers Installing the Switch Control Units and Switches SCU and Switch Mounting Diagram Installing the Switch Control Units and Switches This Chapter Description Recommended Equipment Required Equipment Setting Up the Equipment Performance Veriﬁcation TestSystem Digital Oscilloscope Network Analyzer Cables Calibration Save Setup Measurement Display Switch Control Unit Voltages Verifying the Multiple Channel ControllerTurn-On Voltage Check Inputs/Outputs Output Trigger Test Pulse Receive and Cycle Test Counter Pulse Delay Test Counter Pulse Delay Test Setup Measurement Busy Signal and Pulse Width Test Verifying the Switch Control Unit Verifying the RF Switches Switch Setup Recall Verifying Remote Ports 1 JumpersEquipment Required Remote Port 1 and remote Port 2 Test Procedure AUX 1 and AUX Pulse TestMeasuring Pulses from AUX 1 or AUX When Finished with All Tests Procedure Purpose Operator’s Check General Information Product Description In-depth Information Measurement Speed AdvantagesTriggering Lowering the Workload on the Computer Controller Installing the Detachable Power Cord Manual Operation Switch Components Switch control unitsPreparing the 85330A to Control the System Special Systems PIN switch modules Downloadable Driver System Interface Required Equipment85383A Local Control Cable 85384A Switch Driver Cable Agilent 85383 Wiring Table85383B expansion cable 85385A Remote Trigger Cable PIN Switches 85331A SP2T PIN Switch85332A SP4T PIN Switch Supplied Equipment and Software Supplied Equipment and Software Characteristics 85330A Multiple Channel ControllerEnvironmental Limits Environmental Conditions for the 85330A Dimensions Size and DimensionsVentilation Requirements Front Panel Features Need More Information Rear Panel Features 85330A Rear Panel Connectors Rcvr Ready Remote 1 Switch Port 1 AUX Power 85330A Compatibility Compatible LO SourcesCompatible RF Sources Required Options for Agilent 836xx LO Sources 85330A Compatibility Manual Operation To Use the Front Panel About the Softkeys Menus Utility Keys Softkey Map 85330A Softkey Menu Map To View or Change the 85330’s Gpib Address Changing the Gpib Address To Close Any Switch in the System to select a channel More about Switch Addresses To View the Most Recent Error Message To Change the TTL State of AUX 1 or AUXTo View the Revision of the Downloaded Driver To Perform Service Functions To View Custom Option Number If ApplicableTo Manually Send Trigger Pulses To View Custom Option Number If Applicable This Chapter Gpib Addresses Long and Short Command Syntax 6Programming Switch address Deﬁnition of TermsSCU address Channel How to Use the Figure To Choose a Measurement Conﬁguration CW Measurement Conﬁguration Description To Use this Conﬁguration 8530A settings Single Source Multiple-Frequency Conﬁguration 85330A settings Dual Source Multiple-Frequency Measurements 8530A Control of Sources Source settings Fast Source Control Selecting a Channel Other examples This example To Use Run-Time Control Mode Setup 85330A Multiple Channel Controller Event TriggeringNumber of Angular Increments Events List of Switch States Number of Frequency Points Switch Settling Time TTL Trigger and Ready Timeouts Select Switch State Idle Switch List Loop Event TriggerReceiver Ready Run-Time Flow Chart with Programming Command References Frequency Loop Event Loop Using IMM vs. TTL Trigger for Source Run-Time Measurement Sequence for Multiple Controllers To Use Run-Time Control Mode To Use Run-Time Control Mode Programming Examples Example Pairs Repeat Wait Until the Receiver is Ready to Is the Current Point RE-SAVE EX2 Output @RecLISFREQ Soft Reset If PassesAnglepts then RE-SAVE EX3 Assign HP 8530A HP-IB Output @RfSYSTLANG Scpi Output 1194 85330A Error Messages 1305 Not enough driver RAM for this driver 85330A Error Messages Command Syntax Common Command Format Standard Command Format Abbreviated Commands ParametersParameter Types Common Commands Default Syntax ExampleSyntax Example Default OPC? Standard Command Reference Subsystem Command SyntaxDefault Syntax ROUTe ROUTeDELay ROUTeCONTrol Subsystem Command Syntax RUNTime RUNTimeCONTroller RUNTimeEVENtCOUNt TTL Mode IMM Mode Default Syntax Example RUNTimeEVENtTRIGger RUNTimeINITiateIMM RUNTimeSOURceCOUNt RUNTimeSOURceSOURCE1TRIGger RUNTimeSOURceSOURCE2TRIGger RUNTimeSWITchDELay RUNTimeSWITchSCAN Sets AUX 2 output to TTL LOW during run-time RUNTimeSWITchTRIGger This command is in revision A.02.31 or greater RUNTimeTIMEoutEVENt RUNTimeTIMEoutRECeiver RUNTimeTIMEoutREMote RUNTimeTIMEoutSOURceSYSTem SYSTemERRor? Read. The *CLS command will clear the error status Standard Command Reference When Turned on 85330A Does Not Show the Main Menu Case of Difficulty Service Introduction Theory of Operation Gpib 85330A Timing Sequence of a Typical Measurement Timing Sequence Trigger Widths Trigger Width Description Theory of Operation Recommended Test Equipment Required Test Equipment Service Troubleshooting Troubleshooting the SystemTroubleshooting Multiple Channel Controller Troubleshooting Troubleshooting the RF Switch Troubleshooting the CablesSwitch Port 1/2 Connector Pinout 85383A Connector Wiring Table 85385A Wiring Replaceable Parts 85330A System Identiﬁcation Diagram 85330A Mainframe Replacement Parts Mainframe, Plug-in Cards RF Switch 85331/2 Switch Control Unit Replacement Parts85331/2 Switch Replacement Parts Replacement Interconnect Cables for 85330/31/32 Interconnect Cables Assembly and Disassembly DisassemblyAssembly Mainframe E1330 Card Conﬁguration Card Conﬁguration Remove the Local Control cable and Switch Drive cable Adjustments Selecting Positive or Negative-Edge Event Triggers Selecting the Multiple Channel Controller’s Gpib Address Switching from the Internal to External Power Supply Required Mating Connector10 AUX Power In Connector Pinouts as looking at rear Preventive Maintenance Preventive Maintenance Accessory Documentation 10-2 Controller Direct ControlFast CW Modes Fast Data Acquisition Modes 85330A System Operating Characteristic Receive SwitchInsertion Loss LO/IF Unit Run-Time Control Mode Receiver SystemRemote Return Loss Switch Control Unit Switch ModuleStandard System Typical Glossary Index Numerics Index-2 Index-3