This structure defines a physical value relative to a X axis and it is used as the DataTypeof the Value of XYArrayItemType. For details see 5.3.4.3.

Many devices can produce values that can perfectly be represented with a float IEEE 32 bits but, they can position them on the X axis with an accuracy that requires double IEEE 64 bits. For example, the peak value in an absorbance spectrum where the amplitude of the peak can be represented by a float IEEE 32 bits, but its frequency position required 10 digits which implies the use of a double IEEE 64 bits.

Its elements are defined in Table 26.

Table 26– XVType DataType structure

Name

Type

Description

XVType

structure

x

Double

Position on the X axis of this value

value

Float

The value itself

Its representation in the AddressSpaceis defined in Table 27.

Table 27– XVType definition

Attributes

Value

BrowseName

XVType