Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 363)

Programmer’s Manual
986896
Glossary G-5
Hold Register
Represents the hold register of the 9513.
Input Sample
The data for a single input channel that is part of a scanned channel acquisition.
Internal clock
The internal clock resides in the acquisition device and can be set (programmed) through software.
The pulse from the internal clock is used to drive synchronized input or output operations.
Linearization
Some transducers produce a voltage in linear proportion to the condition measured. Other transducers (e.g.,
thermocouples) have a nonlinear response. Converting nonlinear signals into accurate readings requires software to
calibrate several points in the range used, and then interpolate values between these points.
Load Register
Represents the load register of the 9513.
LONG
A 32-bit signed integer (4 bytes) quantity that can range from -2,147,483,648 to +2,147,483,647. This parameter
type should be passed by value according to the dictates of the programming language used.
LPSTR
A pointer to a character string. This parameter type should be passed by reference according to the dictates of the
programming language used. This parameter is normally a pointer to a device name or other ASCII string value.
Multiplexer (MUX)
A device that collects signals from several inputs and outputs them on a single channel.
Parameter
An element of the function, or of the command prototype, that is passed into the function.
PBOOL
A pointer to a 32-bit Boolean (4 bytes) quantity or an array of 32-bit Boolean quantities that take on false ( = 0) or
true(
≠ 0) values. This parameter type should be passed by reference according to the dictates of the programming
language used.
PDOUBLE
A pointer to a 64-bit double precision (8 bytes) floating point number or an array of 64-bit double precision floating
point numbers. This parameter type should be passed by reference according to the dictates of the programming
language used.
PDWORD
A pointer to a 32-bit unsigned integer (4 bytes) or an array of 32-bit unsigned integer quantities that can range from
0 to 4,294,967,295. This parameter type should be passed by reference according to the dictates of the programming
language used.
PFLOAT
A pointer to a 32-bit single precision (4 bytes) floating point number or an array of 32-bit single-precision floating
point numbers. This parameter type should be passed by reference according to the dictates of the programming
language used.
PLONG
A pointer to a 32-bit signed integer (4 bytes) or an array of 32-bit signed integer quantities that range
from: -2,147,483,648 to 2,147,483,647. This parameter type should be passed by reference according to the dictates
of the programming language used.