Specifications

Glossary 135
One-shot Mode
The Measurement Control Module (MCM) has an internal timer/counter that is primarily used to time
the open/close of the MCM relays. It can also be used as a trigger source. As a trigger it can either in
either of two modes; it can run continuously, or it can be set to generate a single, or one-shot, pulse.
Open All Relays
A command that immediately opens all the relays, both columns and rows, on a module.
Open System Standard
Refers to the TS-5400 Functional Test System's use of the industry standard VXIbus and a C-size VXI
mainframe as its primary organizational unit.
Operator Interface
A customizable user interface through which production operators interact with the Test Executive.
Because it is customizable, we say the Test Executive can have multiple “personalities.”
Optical Isolator
A digital device that electronically isolates a signal from its source by converting the input signal to a
light source, usually laser or LED, and reconverts the signal to an electronic signal using a photoelectric
device.
P
Parameter Block
A list of parameters stored in a uniquely named group or “block.” When you need to use the list of
parameters, you specify a handle (name) to the parameter block instead of specifying the full list of
parameters.
Parasitic Capacitance
Capacitance caused by the close proximity of adjacent components, pins, or bus lines.
Programmable Array Logic
A semiconductor consisting of an array of generic logic elements that, with the aid of a programming
device, is capable of having these elements arranged into a variety of functional elements.
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