Agilent Technologies manual Multiple 82357A Operation, SRQ Operation

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Using the 82357A

Modes of Operation

Multiple 82357A Operation

When two or more 82357As are attached to a system at the same time, we define the mode as the multiple mode of operation. In multiple mode of operation, each 82357A is “bound” to its related IO Configuration for that Serial Number. This is a different mode of operation than the single mode of operation in that the configuration is not reused if you replace an 82357A with another 82357A.

As with single mode of operation, the first time an 82357A is attached to a system (assuming the Agilent IO Libraries Suite is installed), the software recognizes that an 82357A is attached. If Connection Expert is not running, the software displays an Agilent 82357A USB/GPIB Interface Detected dialog box that allows you to accept the current settings. If Connection Expert is running, it automatically refreshes, displaying the 82357A as a USB/GPIB interface in its tree view; you can then change the properties of the interface in Connection Expert.

The VISA and SICL interface IDs, Logical Unit, and GPIB Address may be viewed at any time in the property pane of the Connection Expert. (To view this window, click the blue IO icon and then click Agilent Connection Expert.)

Then, if you plug in another 82357A (with a different Serial Number), the new 82357A will automatically be assigned a unique VISA Interface ID, SICL Interface ID, LU, and GPIB Address.

NOTE

You can change the parameter values of the 82357A as required. See “Changing Configuration Parameters” for details.

You can also convert from multiple mode of operation to single mode of operation. See “Changing Modes of Operation” for details.

SRQ Operation

If your VISA/SICL application uses SRQ callbacks (viEventHandler() in VISA or ionsrq() in SICL) and your callback does not service the SRQ in a timely manner, your SRQ callback function may be called multiple times.

To avoid this possible situation, design your SRQ callback functions to handle being called when an SRQ is no longer asserted on the GPIB bus.

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Chapter 2

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Contents USB/GPIB Interface Converter Page Contents Guide Contents Guide General Information Installing the 82357A Installing the 82357A Steps to Install the 82357A Before You Install the 82357ABefore You Install the 82357A Check Your ShipmentCheck System Requirements Installing Agilent IO Libraries Suite Checking for Installed Agilent IO LibrariesInstalling Agilent IO Libraries Suite ‰ Click Start Run Connecting the 82357A 82357A Hardware DescriptionConnecting the 82357A to Your PC Connecting the 82357A to a USB Hub USB Cable 82357A Introduction Observing Windows Plug and Play ManagerSequence Windows XP Only Hardware Installation dialog box appears Typical Windows Plug and Play Manager SequenceConnecting the 82357A Connecting the 82357A Configuring the 82357A Setting 82357A Default ConfigurationConnecting Multiple 82357As. An Agilent 82357A USB/GPIB Configuring the 82357A Setting 82357A Custom Configuration Configuring the 82357A Connection Expert Connecting Gpib Instruments Connecting a Single Gpib InstrumentConnecting Multiple Gpib Instruments Programming via the 82357A Establishing Instrument CommunicationProgramming Gpib Instruments Introduction to IO Accessing Visa Sicl ManualsConfiguration InterfaceTypical System Installation 82357 USB/GPIB Interface Using the 82357A Using the 82357A Modes of Operation Initial 82357A Operating StatesSingle Mode Features Multiple Mode Features Introduction to 82357A Operating ModesSingle 82357A Operation Multiple 82357A Operation SRQ OperationSetting Configuration Parameters Changing Configuration ParametersSetting Timeout Floor Values Changing Modes of OperationSetting T1 Value With Sicl Setting 82357A High-Performance OperationIntroduction Setting T1 Value With Visa Setting Configuration Parameters Chapter Troubleshooting the 82357A Troubleshooting the 82357A Troubleshooting Flowchart Observe the LED StatesFor telephone and web assistance, see Contacting Agilent on Check USB Cables, USB Interface, Host PC Reboot the PCHardware Checks Check Device Manager Check Suspend/Resume Operation Software Installation ChecksVerify Agilent IO Libraries Suite Installation Software Installation Checks Verify 82357A USB Driver Installation \Windows\inf\agt3579x.infSoftware Configuration Checks Checking IO Control OperationCheck USB Scanner Check for usbscan.sys Windows 98 SE Only Assigning usbscan Driver to the 82357A Contacting Agilent Service/Support Information82357A Service Information 82357A User’s Guide Information 82357A User’s Guide Information Guide Contents Guide General Information Government Restricted RightsPrinting History Warranty InformationTrademark Information Copyright InformationDeclaration of Conformity 82357A Specifications 82357A Specifications Technical Specifications General RequirementsSupplementary Information Gpib Modes Operation SupportedIndex IndexIndex Page 82357-90002