Continuous Drive Current | Agilent Technologies L4400 instruction

7Microwave Switch/Attenuator Driver

Using Single Drive Switches and Attenuators

Some microwave switches require a single drive. With single drive devices the channel numbering is not consecutive across all channels in a bank (refer to the channel numbering description on page 143).

The L4445A can provide single drive devices with either pulsed or continuous drive current. Settings and parameters for continuous drive mode are given in the next section.

Continuous Drive Current

Driving non- latching devices requires a power supply capable of handling sustained high current requirements. You may only use continuous drive current with channel configured for single drive. Additionally, to prevent power supply loading, care must be taken when operating more than one continuous drive at a time. The actual drive may be configured as either TTL or open- collector operation.

Using Continuous Drive

The diagram below illustrates the continuous drive signals for two channels (switches) and the relationship of the drive parameters to the power supply requirements.

T(Setttle)

T(Recovery)

Drive Ch 1

Drive Ch2

Start Drive	Start Drive	Channel 1 Position
Channel 1	Channel 2	Indicators Evaluated

As shown in the diagram, the drive signal is initially applied to channel 1. Drive is applied to channel 2 only after a power supply recovery period has elapsed T(Recovery). The power supply recovery time is set using the the ROUTe:CHANnel:DRIVe:TIMe:RECovery command. This parameter may be set individually for each channel or will default to 0.0 ms following either a SYSTem:RMODule:RESet or ROUTe:RMODule:BANK:PRESet command.

If you are verifying the channel closure (see page 149), you may also specify a T(Settle) parameter. This parameter ensures the switch has had time to change state before the position indicator is evaluated. This parameter may be set individually for each channel or will default to 0.0 ms following either a SYSTem:RMODule:PRESet or

ROUTe:RMODule:BANK:PRESet command.

146	L4400 User’s Guide

Image 156

Agilent Technologies L4400 Using Single Drive Switches and Attenuators, Continuous Drive Current, Using Continuous Drive

Contents

User’s Guide Manual Part Number Additional Safety Notices General Declaration of Conformity Contents Using the Alarm Output Lines Operating and Programming Low Frequency Multiplexer Switch Instrument Matrix Switch Instrument L4437A Simplified Schematic 34937T Terminal Block Digital Input/Output Totalizer Input L4451A and L4452A Calibration Procedures Channel Isolated DAC Module Introduction to the L4400 Series LXI Instruments Instrument Considerations Environmental Operating ConditionsL4400 Series LXI Instrument Voltage Ratings Electrical Operating Conditions TransientsHigh Energy Sources Module inputs Interconnection Solutions Overview Ordering Information Rack Mounting Kit Contents Bench-Top Operation and Instrument Rack MountingBench-Top Operation Rack Mounting Procedure Y1160A Instrument Rack Mount Kit L4400 Series Install the Shelf Rails Access to the cabinet’s vertical columns is desired Rack Column and Shelf Rail Orientation Install the Sliding Shelf Install Instruments on the Shelf Connecting the Terminal Block Support Sleeve Connecting the terminal block to the instrument Applying Power Connecting the Power Cord and Turning On the InstrumentAgilent L4400 Series Instrument Input Power Specifications Connect the Shelf to the Rack Frame Location of the L4400 Series Instrument Power Button Software Installation and Configuration Installing the Agilent IO Libraries Agilent IO Libraries Suite System Requirements Installing the L4400 Instrument Drivers Installing the L4400 Instrument DriversAgilent Visa with Another Vendor’s Visa L4400 Product Reference CD-ROM Software Driver Menu L4400 Programming Environments and Recommended Drivers Configuring the L4400 Instruments Selecting a LAN NetworkPrivate LAN Considerations Connecting the LAN Cables Site LAN Considerations Private Network Connections Typical Private LAN Network Connections IP Addresses and Host Names Site Network Connections Configuring the LAN Interface Computer ConfigurationInstrument Addressing Locating the Instruments Libraries Suite Getting Started Agilent Connection Expert ACE Opening Window Adding and Configuring the Instruments Manually using the IP addresses Verifying a Communication Path to the Instrument 10. Configured Instruments added to LAN Network Interactive IO Identifying the Instruments 11. Selecting an Instrument and Starting Interactive IO Using the Instrument Web Interface IDN? 12. Opening the Instrument Web Interface Editing the Instrument’s LAN Settings 13. L4450A Web Interface Welcome L4400 User’s Guide LAN Configuration Command Summary Help contents Gpib Configuration Connecting the Gpib CablesStarting Agilent Connection Expert Adding Instruments to the Gpib Configuration 16. Adding Instruments to the Gpib Interface Gpib Address String Verifying the Gpib PathChanging the Gpib Address 19. Setting the Gpib Address Using the Interactive IO Window 20. Changing the Gpib Address within Configuration Expert Verifying the new Gpib Path 21. Connecting to Gpib Address 10 using Interactive IO Adding Additional Instruments Firmware Updates Downloading the Update Utility and FirmwareInstalling the Firmware Update Utility Downloading and Installing the Instrument Firmware FirmwareUpdateUtility.exe 22. Firmware Update Utility Firmware File Selection Update each instrument 23. Selecting the Instrument Interface Current sub-assembly firmware revision is incompatible with Updated carrier firmware 24. Instrument Firmware Update Complete Instrument Power-On and Default LAN Configuration States LAN Reset Default ConfigurationL4400 Instrument Power-on and Preset States Default LAN Configuration Settings LAN Parameter Default Reset Setting Operating and Programming LAN Reset Button L4400 Instrument Front Panel OverviewFront Panel LEDs L4400 LED Definitions and Instrument Status Color Condition L4400 Instrument Rear Panel Overview Analog Bus Port Ext Trig/Alarms/DIO Port Gpib ConnectorAlarm Usage LAN Port Introduction to the Scpi Command Language L4400 Series Channel Addressing SchemeL4400 Series Channel Addressing Examples Syntax Conventions KeywordsBraces and Vertical Bars Brackets Command Separators Using the MIN and MAX ParametersQuerying Parameter Settings Linking Commands L4400 Scpi Command Summary Specifying Channel Lists and Scan Lists L4400 Series Scpi Command Summary MEMory Commands IEEE-488 LAN Configuration SYSTem L4400 Series Programming Examples Modifying IVI-COM Examples .NET Visual Basic.NET Changing the Instrument Address String IVI-COM Programs Modifying IVI-C Examples Visual Basic Modifying Visa and Visa COM Examples Changing the Instrument Address String IVI-C Programs Visa COM Examples Change address string Double-click to view source code Using L4400 Instruments in Agilent 34980A Applications Agilent L4400 Series and 34980A Module Cross Reference Analog Bus Applications Porting ApplicationsUsage Occurs. The pollution has no influence on insulation IEC 2nd Edition Safety Interlock User-Defined Channel Labels All L4400 series instruments Scanning Applications Rules for Scanning Make- before- break fashion Creating the Scan List Scan Trigger Source Interval Scanning Manual Scanning Scanning on Alarm Alarm Limits on Trigger Count Externally Triggering a Scan 11. Sweep Count Diagram Sweep Count Channel Delay L4421A 40- Channel Armature Multiplexer 12. Channel Delay Reading Format Non-Sequential Scanning Monitor Mode Scanning with External Instruments Input ChannelsCommon Terminals 14. External Scanning Using the L4421A and a DMM Alarm Limits Initiate the scan close first channel FORMatREADingTIMETYPE command setting OUTPutALARm12SOURce @chlist Viewing Stored Alarm Data Enable pattern compare mode Using the Alarm Output Lines 15. The L4400 Series Rear Panel Alarm Connector Using Sequences Clear Both alarm outputs Defining a Sequence L4421A / L4433AL4437A L4445A L4450AL4451A L4452A Routseqdef MYSEQ1,ROUTCLOS @10011009OPEN @1001 Querying the Sequence Definition Executing a Sequence Executing a Sequence on an Alarm Condition Deleting Sequences Reading the List of Stored Sequences Instrument State Storage Error Conditions Relay Cycle Count Calibration Overview L4421A 40-Channel Armature Multiplexer Low Frequency Multiplexer Switch Instrument L4421A Measurement Functions L4421A Scpi Command Summary L4421A Scpi Command SummarySubsystem Commands ROUTe L4421A Supported Measurement Functions Switch Control SENSe DIAGnostic L4421A Example Program SegmentsOpening and Closing Channels TRIGger Querying and Clearing Cycle Count, and Resetting Modules L4421A 40-Channel Armature Multiplexer Hardware Description Simultaneously L4421A Simplified Schematic Bank Relays Armature latching L4421A D-Sub Connectors Bank This means that when an installed module is exposed 34921T Terminal BlockFurther information 34921T Terminal Block This page Intentionally Blank Matrix Switch Instrument L4433A Scpi Command Summary L4433A Dual/Quad 4x8 Reed Matrix Matrix Switch Instrument Sub connectors L4433A Scpi Command Summary L4433A Scpi Command Summary SYSTemMODuleWIREMODE WIRE1,1 L4433A Example Program Segments Although the previous two examples show the same channel DerivationBuses Reading Cycle Count and Resetting the Power-On State Linking Multiple L4433A InstrumentsMode L4400 User’s Guide 117 Two-Wire Mode L4433A Dual/Quad 4x8 Reed Matrix Hardware Description One-Wire Mode L4433A Simplified Schematic for Two-Wire Mode Matrix L4433A D-Sub Connectors for Two-Wire Mode Matrix 34933T-001 Terminal Block for Two-Wire Mode Doesnt match the present module configuration112 for further information L4400 User’s Guide 123 L4433A Simplified Schematic for One-Wire Mode Channel Matrices 1 Matrices 3 34933T-002 Terminal Block for One-Wire Mode L4437A General Purpose Switch General Purpose Switch Instrument WA RN I N G A Relay Power-Down State Jumper L4437A Scpi Command Summary L4437A Scpi Command Summary Reading Cycle Count and Resetting Modules to Power-On State L4437A Example Program SegmentsReading Jumper State and System Identity L4437A Simplified Schematic Threshold of 70 oC L4437A D-Sub Connectors Channel Pin Pins 34937T Terminal Block L4437A Terminal Block Microwave Switch/Attenuator Driver L4445A Scpi Command Summary L4445A Scpi Command Summary L4400 User’s Guide 137 L4445A Microwave Switch/Attenuator Driver L4445A Microwave Switch / Attenuator Driver Configuration 34945EXT Module Electro-static discharge Recommended Switches and Attenuators Power Supplies Power Consumption Channel Numbering 1remchannel Simple Switch Control You must turn off the channel drive before sendingChannel drive back on Remote Module Identifiers Drive Modes Using Single Drive Switches and Attenuators Using Continuous DriveContinuous Drive Current Using Dual Drive Switches and Attenuators Pairing Channels Using Pulse Drive Channels must have verification enabled Verifying Switch State Long Execution Times 150 LED Drive LEDs will not operate Default and Reset States SYSTemRMODuleRESet SYSTemPRESet, *RST, SYSTemCPON and Power On ROUTeRMODuleBANKPRESetDefault state of OPEN, no action is taken on these channels Distribution Boards Y1150A Switch Options Supported Y1150A Y1150A Switch Connectors SW1 Through SW8 Y1150A Connections Y1150A Switch Control Cable Wiring Y1150A LED Connectors LED1 and LED2 Y1151A Switch Options Supported Y1151A Y1151A Switch Connector SW1 and SW2 Y1151A Connections L4400 User’s Guide 161 Y1151A Switch Control All channels are single drive Y1151A LED Connectors LED1 and LED2 Y1152A Switch Options Supported Y1152A Y1152A Connections Y1152A Switch Connector SW2 and SW3 N181x +VR Y1152A Switch Control Conductor Cable Y1152A LED Connectors LED1 and LED2 Y1153A Y1153A Attenuator Options Supported84904/5/6/7/8 Y1153A Connections 8494/5/6 Y1153A Attenuator connector P101 and P102 84904/5/8 Connections to the attenuators. You should not use both Individual sections switched When all channels open at reset maximum attenuation is setY1153A Attenuator Control Y1153A LED Connectors LED1 and LED2 Y1154A Switch Options Supported Y1154A Y1154A Switch connector SW1 and SW2 Y1154A Connections Y1154A Switch connector SW3 Through SW8 N181x Y1154A Switch Control Cable Y1154A LED Connectors LED1 and LED2 When using the Y1155A, the ROUTeRMODuleBANKPRESet Operations of these switch systemsY1155A Y1155A Switch Options Supported Capacity limitations EXT limits total switch 876x Switches Y1155A Connections Y1155A Switch Control Paired OperationsUnpaired Operations Y1155A LED Connectors LED1 and LED2 Simplified Connection Diagrams Single Drive With Separate Position Indicators Paired Drive With Separate Position Indicators Paired Drive With Combined Position Indicators Mounting the Remote Modules Example Configuring an Agilent N1810UL Example Configuring a Paired Drive ChannelScpi Programming Examples Example Configuring a Single Drive Channel 190 Handshaking Pattern Matching Counter Clock L4450A Scpi Command Summary L4450A Scpi Command SummaryCONFigure MEASure Digital SOURce TRACe Alarm Limit CALCulate Monitor OUTPut FORMat SWEep L4450A 64-Bit Digital I/O with Memory and Counter BankBank Basic Digital I/O Operations Channel Numbering and WidthReading Digital Data Writing Digital Data Channel Width and Polarity, Threshold, Level, and Drive Not exceed 5 Handshaking Output Setting the Handshake Line Parameters Apply to the bank’s interrupt line Synchronous Handshake Mode H0 Direction Data Out L4400 User’s Guide 207 208 L4400 User’s Guide 209 Buffered I/O Operations Buffered Memory Output Data line polarity Deleting Traces Buffered Memory Input Interrupt Lines Memory Output Operations Byte Ordering Memory Input OperationsApply to the bank’s handshake lines Pattern Matching Totalizer Mode Counter Initiated Measurement Mode Ext Gate Input Init L4450A D-Sub Connectors ClockP1 Bank P2 Bank P1 Bank 1 Connector Pin Assignments P2 Bank 2 Connector Pin Assignments 34950T Terminal Block L4450A Terminal Block 222 34951T Terminal Block Recommended that you use remote-sensing. However, if Remote-sensing terminals H Sense and L Sense Signal. However, both a user-supplied external clock Module’s Clock Out cannot drive the line at the same time L4451A Scpi Command Summary L4451A Scpi Command Summary L4400 User’s Guide 227 Level Mode L4451A Example Program Segments Waveform Mode Configuring a DAC Module Using this command will erase any downloaded waveformsExternal Clock External Trigger L4451A Simplified Block Diagrams 34951A Module User-Supplied Connections L4451A D-Sub Connector Pinout DAC 34951T Terminal Block L4451A Terminal Block 234 L4452A Multifunction Module with DIO, D/A, and Totalizer L4452A Multifunction Module Enabled state, effectively creating a gate always condition L4452A Multifunction ModuleDigital Input/Output Totalizer Input L4452A Scpi Command Summary L4452A Scpi Command Summary Measurement L4400 User’s Guide 239 Data L4452A Example Program Segments Digital Input/OutputTotalizer Querying and Resetting the L4452A DAC Output L4452A Simplified Block Diagram Totalizer L4452A D-Sub Connector 34952T Terminal Block L4452A Terminal Block 246 Calibration Message Calibration Count Multifunction Module Calibration Procedures Agilent Technologies Calibration ServicesAdjustment is Recommended Calibration Interval Automating Calibration Procedures Time Required for CalibrationRecommended Test Equipment Table A-1. Recommended Test Equipment Following the procedure below Calibration Security Calibration Message Calibration Count Until a complete re-adjustment has been performed Calibration ProcessAborting a Calibration in Progress Performance Verification Tests L4451A and L4452A Performance Test ConsiderationsL4451A 4-Channel Isolated DAC Module L4451A Verification Output current verification Analog Output Verification Test Current Output VerificationOutput Voltage verification Error From Nominal Voltage Output VerificationTable A-2. L4451A Output Current and Voltage Levels 90 day Analog Output Adjustments Table A-2. L4451A Output Current and Voltage Levels cont’d Voltage Adjustments CALibrationSECureSTATe 0, code Current Adjustments Table A-3. L4451A DAC Voltage Calibration Points CALibrationBEGinCURRent 1, @1001 Table A-4. L4451A DAC Current Calibration Points L4452A Multifunction Module L4452A VerificationDAC Output Verification Test DAC Output Adjustment Table A-5. L4452A Output Voltage Levels Channels 6 CALibrationBEGinVOLTage 1, @1006 This page Intentionally Blank Numerics Gpib L4400 User’s Guide 267 Visual Basic 6.0 L4400 User’s Guide 269