Instrument Description If specified, indicates that this is a description for a module or an option. Instrument(s) ito which the module or option belongs. Modules and options can not be used without the associated instrument. Used to indicate whether the version speciifed is the minum or maximum version supported. The driver type is specified by providing a type that derives from the "Driver" abstract type. The derived type includes any informaiton that is specific to that driver type. The schema includes derived types for serveral different driver types. Identifies any dependencies. Identifies the platform requirements for using this driver. The bus type is specified by specifying a type derivied from the "Bus" abstract type. The schema includes derived types for common instrumentation control buses. The control language is specified by provideing a type that derives from the "ControlLanguage" abstract type. Any software tool that comes with the Instrument, e.g., Calibration Utility, Soft Front Panel, etc. Identifies any dependencies. Name of the configuration option. Configuration options are values the user can modify that persist after a power-cycle. Keyword-value pair for identifying manufacturer instrument defaults. Keyword-value pair for identifying power-on defaults. Conditions under which the specifications are measured. These conditions apply to all specifications. Each individual specification can add additional conditions, or override/replace the any of these conditions. Specifies traceability information for all specs A grouping of specifications that share a set of conditions. Conditions under which the grouped specifications are measured. Each individual specification can add additional conditions, or override/replace any of these conditions. Identifies the support equipment needed for running calibration. The calibration procedure. Specifies how often calibration needs to be executed. List of errors associated with the instrument. Warning, error fatal instrument, driver Resources are the physical entities in the instrument that provides the source and measure capabilities. Need to figure out how to represent triggers. TBD Netlist describing how all the ports in the instrument are wired together. In the simplest scenario, the capability ports get wired to Resource ports and the resource ports get wired to the Instrument ports. Section for capturing the legal "stuff". Abstract type for instrument drivers. VXI plug and play driver IVI driver - includes structure for specifying whether the driver is an IVI-C or IVI-COM driver Name of IVI class(es) provided by this driver ProgID used to instantiate the driver class. COM driver Windows DLL based driver Abstract type for control language identification Specifies that the instrument can be controlled using SCPI commands Specifies that the instrument is a register based instrument Specifies that the instrument can be control using some generic control language Abstract type for identifying the bus used to communicate with the instrument The amount of dynamic current in amps consumed by the device on each of the VXI backplane voltage lines. The amount of peak current in amps consumed by the device on each of the VXI backplane voltage lines. The number of ECL trigger lines concurrently input or sensed. The number of TTL trigger lines concurrently input or sensed. Identifies the keying class (1-6) defined by the VXI specification. Classes 7, 8, and 9 are defined as follows: Class 7 – No local bus Class 8 – Sensor +/-16V Class 9 – Sensor +/-42V Top Key supports C size modules. Bottom Key supports D size modules (Bottom Key on C size modules is always 7). The module cooling as back pressure in mm/H2O Represents Module Cooling as air flow in liters/sec. Identifies the type of VXI address space needed by the instrument or module in addition to A16. The number of interrupt lines utilized by a device. The weight of the module in kilograms per slot occupied. The number of slots consumed. This type is used to store the amount of current in amps consumed by the device for each of the VXI backplane voltages. Used to specify the number of trigger concurrently input or sensed. Allows multiple identical items to be described with a single element in an instance document. Starting index for the items. Number fo identical items Specifies the value to increment by when calculating the value with which the replacement character is replaced. Allows for defining items where paired items have different characteristics. Defaults to 1. Character replaced with calculated index when repeated items are expanded. Index used to identify the resource. Describes how the various instrument entities are connected. A short (one or two sentence) textual description of the specification A rigorous (mathematical) description of how the specification is defined and measured Conditions under which this specification is measured. The limits for the specification. Supplies graphical data for specifications that vary with other parameters. Some specs are only available in graphical format. Supplying a bitmap of the graph is one way to satisfy this requirement; the other is to ask the vendor to include all the data, but that would lose important annotations from the graph itself. Any additional information that is necessary to clarify the specification. This includes information that is contained in footnotes of the datasheet Instrument options that are required for this spec to be valid Instrument options that make this spec invalid Guaranteed: If the instrument does not meet this spec, it is considered broken and will be repaired under warranty Typical: Most instruments would be expected to meet this spec, but it is not guaranteed States the expected percentage of instruments that will meet the spec Nominal: Characteristics that are true by design, but not measured or tested. Characteristic: A ball-park figure that describes the type of performance that may be expected, but not verified with rigorous statistical analysis or measurements Feature: A description of a feature, which is not actually an instrument spec but is the sort of thing that is often included in the spec sheet