ADInstruments PowerLab/4SP Owner's Manual page 67

front-end. An ancillary device that extends
PowerLab capabilities, providing additional
signal conditioning and features for
specialised work. Front-ends are recognised
automatically by the PowerLab system and
seamlessly integrated into its applications,
operating under full software control.
gain. The amount of amplification of a signal.
half-bridge transducer. A bridge transducer
only using half of the full-bridge circuit. It
consists of two elements of equal value with
an excitation voltage applied across them.
The output of the transducer is taken at the
junction of the two elements.
hertz (Hz). The unit of frequency of vibration
or oscillation, defined as the number of cycles
per second. The PowerLab's maximum
sampling rate can be up to 100 kHz for E
series and 200 kHz for
high-pass filter (HPF). A filter that passes
high-frequency signals, but filters low ones,
by blocking DC voltages and attenuating
frequencies below a certain frequency, called
the cutoff, or –3 dB, frequency.
2 2
I C. The I C (eye-squared-sea) connection is
used by the PowerLab to control front-ends.
It provides power and communications using
a 4-wire serial bus (two wires for standard
2
I C and two control lines).
IEC. International Electrotechnical Commission.
low-pass filter (LPF). A filter that passes low-
frequency signals and DC voltages, but filters
high ones, by attenuating frequencies above a
certain frequency, called the cutoff, or –3 dB,
frequency.
Glossary
and PowerLabs.
SP ST
Macintosh. A family of Apple computers
with built-in graphics and an elegant user
interface. Of the Mac OS (operating system)
versions, System 7 is needed and System 7.6
recommended normally; a Power Macintosh
and Mac OS 8.5 or later are needed for USB.
MacLab. An earlier name for the PowerLab,
before it became cross-platform.
Peaks. A simple chromatography analysis
package. It reads acquired data from
Macintosh Chart, Scope, or text files.
(Available for Macintosh only.)
Pod connector. A special 8-pin DIN connector
on some PowerLabs giving differential or
single-sided connections for some analog
inputs (Inputs 1 to 4 on the PowerLab/4
Pods can connect to them, and they can also
provide power and control for some types of
transducers.
Pods. Small, low-cost units that connect to
the Pod connectors on the PowerLab. They
give alternatives to front-ends for specific
tasks, for use with precalibrated transducers
and so on.
port. A socket in a computer where you plug
in a cable for connection to a network or a
peripheral device. Also, any connection for
transferring data, for instance between the
CPU and main memory.
PowerChrom. A versatile, flexible, and
powerful chromatography program for use
with a PowerChrom recording unit.
(Available for Macintosh only.)
PowerChrom System. The system consists of
a PowerChrom recording unit and the
).
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