ADInstruments PowerLab/16SP, Руководство пользователя

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PowerLab Owner’s Guide 57
Glossary
This covers terms used in this owner’s guide,
those for ADInstruments front-ends, and the
user’s guides for ADInstruments software.
General and specific computer terminology
should be covered in the material that came
with your computer, or in a recent dictionary.
AC coupling
. A filter option. When AC
coupling is chosen, a 0.1 Hz high-pass filter
before the first amplification stage removes
DC and frequency components below 0.1 Hz.
This removes slowly changing baselines.
ADC
(analog-to-digital converter). A device
that converts analog information into some
corresponding digital voltage or current.
amplitude
. The maximum vertical distance of
a periodic wave from the zero or mean
position about which the wave oscillates.
analog
. Varying smoothly and continuously
over a range. An analog signal varies
continuously over time, rather than changing
in discrete steps.
analog input . This refers to the connectors on
the front of the PowerLab marked ‘Input’.
These inputs are designed to accept up to
±
10
volts. Inputs can be either single-sided or
differential (the latter only in the case of the
Pod connectors).
analog output . This refers to the connectors
on the front of the PowerLab marked
‘Output’. The analog output provides a
software-controlled variable output (
±
10 V)
that can be used with applications either
directly as a stimulator, or to control
peripheral devices.
analysis . When the PowerLab is not
physically connected to the computer, then
ADInstruments software can be used to
analyse and manipulate existing files if the
analysis option is chosen.
BNC . A sort of cable or connector; a BNC-to-
BNC cable connects two BNC connectors.
bridge transducer
. A type of transducer using
a Wheatstone bridge circuit. In its basic form,
the bridge consists of four two-terminal
elements (usually strain gauges) connected to
form a quadrilateral. An excitation source is
connected across one diagonal, and the
transducer output is taken across the other.