Hioki 8860-50, Instruction Manual

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Appendix 3 Terminology
A
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Appendix 3 Terminology
AC
Abbreviation for alternating current
A/D Conversion
Conversion of an analog quantity to
a digital quantity
Active Low
An operation that occurs when sig-
nal voltage level changes from High
to Low
Aliasing Errors
The phenomena that prevents prop-
er signal waveform acquisition be-
cause of aliasing distortion
(p. A48)
Analog
Continuous physical quantity such
as voltage or current
Attenuator
A device that attenuates a signal to
reduce its amplitude
Averaging
The sum of multiple data values di-
vided by the number of those values
to obtain the average value
Beep Sound
The audible alarm produced when
an error or warning occurs
bit
The unit of minimum quantity signi-
fied by a "0" or "1" in binary notation
byte
Unit of binary notation (1 byte = 8
bits)
Channel (Ch)
The input route for a signal
Chassis
The metal frame of the instrument
Comment
A note that can be entered by the us-
er, such as to describe measure-
ment conditions, that can be printed
on recording paper
Common Mode
The situation in which voltage is
present between measurement in-
put lines and ground
Cut-Off Frequency
The frequency at which the output
amplitude of a filter becomes 1/
(-3 dB)
dB (decibel)
Unit used to indicate attenuation or
amplification of voltage, current or
power
DC
Abbreviation for direct current
Digital
Discrete physical quantities
div (divisions)
A unit of linear display measurement
Dots
One pixel of the LCD display, or dis-
play of points of a waveform without
interpolation
2
Drift
A phenomena of false output due to
shift in the operating point of an op-
amp. Drift results from temperature
change and long-term aging that
can occur years after manufacture.
Dynamic Range
The range of amplitudes that a de-
vice is able to display
FFT
Abbreviation of fast-Fourier trans-
form
File
A collection of data preserved on
storage media, conceptually similar
to a paper file stored on a bookshelf
Format
The process of initializing storage
media to a usable state
Function
An operational function
Gain
The numerical value of the ratio of
signal output to input, in decibel
units
GND (Ground)
The reference potential for voltage
measurement
GP-IB
Abbreviation of general purpose in-
terface bus, a bus standard for mea-
surement instrument data transfers
(8-bit parallel)
Interface
Devices required for data exchange
between the instrument and a com-
puter
LAN
Abbreviation of local area network
LCD
Abbreviation of liquid crystal display
LED
Light-emitting diode
Logging
Collecting sample data as numerical
values
Logic
Signals displayed by dividing input
signals into distinct High and Low
levels according to threshold values
Low-Pass Filter
A filter that passes only low frequen-
cies
LSB
Abbreviation of least significant bit,
the minimum unit of A/D conversion
Max. Allowable
Input Voltage
The maximum voltage that can be
applied between input terminals of
an input module
Maximum rated
voltage to ground
The maximum voltage that can be
applied between the instrument
(GND)-to-Module (L terminals), and
between one Module (L terminal)
and another