User Manual
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21.2 Glossary
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A/D
Conversion of an analog quantity into a digital quantity
Aliasing error
Phantom signal components; a phenomenon that occurs if
sampling frequency is low in relation to the frequency of the
sampled signal (see Section 21.3.2).
Active low
A signal that becomes active when its voltage changes from
High level to Low level.
Analog
Continuous physical quantity such as voltage or current
Attenuator
Device for reducing the level of a signal
Bit
Smallest unit of binary information
Byte
Unit of information. 1 byte is made up of 8 bits.
Channel (CH)
Input signal route
Chart
Printout of recorded waveform
Chassis
Metal frame of the unit
Comment
Comments can be entered by the user, such as to describe
measurement conditions, which can then be printed on the
recording paper.
Common mode
Voltage between ground and measurement input line
Cutoff frequency
Point where the filter output amplitude is 1/ of the input.
Digital
Discrete physical quantity
DIV (division)
One measurement grid unit on the display or printout.
Dynamic range
Ratio of maximum vs. minimum amplitude that can be
displayed
FFT
Fast Fourier Transform. Refer to Section 21.3.10 for details.
File
A collection of data on a medium such as tape
LED
Abbreviation of "light-emitting diode"
Logic-level
Waveform expressed as High and Low level
Logical format
Formatting by which necessary information suitable for the
8826 is written to physically formatted disks.
Low-pass filter
Filter that passes through only signals below a certain
frequency
Memory
A device for storing digital data
MS-DOS
Personal computer operating system. MS-DOS is a registered
trademark of Microsoft Corporation.
Offset
Amount of shift in relation to 0 V when scaling is used
Open collector
A type of output requiring an external pull-up resistance.
Physical format
Formatting implemented prior to the use of disks.
Position
When referring to the position of the waveform along the
measurement range on the display, this refers more precisely to
the origin, that is the position corresponding to 0 V.
Pre-trigger
The condition of the signal before triggering occurred
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1.2 Glossary