Datasheet

APCI-3xxx Appendix
Term Description
Signal delay The change of a signal affects the following circuitries with
finite velocity; the signal will be delayed. Besides the signal
delay times that are not wanted, the signal delay can be
extended by time switches and delay lines.
Simple mode The software initializes and starts the A/D conversion and
after this step it reads the digital value of one or more
channels.
Single Ended inputs
(SE)
An analog input with one input terminal whose value is
measured with respect to a common ground
Synchronous In hardware, it is an event that occurs in a fixed time
relationship to another event. In software, it refers to a
function that begins an operation and returns to the calling
program only when the operation is complete.
Throughput rate The maximum repetitive rate at which data conversion
system can operate with a specified accuracy. It is
determined by summing the various times required for each
part of the system and then by taking the inverse of this
time.
Timer The timer allows the adaptation of program processes
between processor and peripheral devices. It usually
contains from each other independent counters and can be
programmed for several operation types over a control word
register.
Trigger Internal trigger:
A software generated event that starts an operation.
External trigger:
An analog or digital hardware event from an external source
that starts an operation.
Digital trigger:
An event that occurs at a user-selected point on a digital
input signal. The polarity and sensitivity of the digital
trigger can often be programmed.
TTL
= transistor-transistor-logic
A popular logic circuit family that uses multiple-emitter
transistors.
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