APPENDIX 6
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Appendix 2 Glossary
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A/D
Conversion of an analog quantity into a digital quantity
Aliasing
Phantom signal components; a phenomenon that occurs if
sampling frequency is low in relation to the frequency of the
sampled signal (see Appendix 3.2).
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
Chassis
Metal frame of the unit
Comment
Notations such as the recording paper and printable measurement
conditions that can be entered by the user.
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)
Unit to indicate the measurement
Dynamic range
Ratio of maximum vs. minimum amplitude that can be displayed
FFT
Fast Fourier Transform For details, see Appendix 3.10
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 formatting
Formatting that writes basic file structure information to the
physically-formatted disks, making them compatible for use with
the 8841/8842 system.
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
Physical formatting
Preparatory formatting necessary before use of floppy 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
Probe
Signal line for supplying the signal to the input
PT
Abbreviation of (voltage) "potential transformer"
Recording length
Total amount of sampling data expressed as number of increments
Reference junction
compensation
When thermocouples are used, the temperature difference between
the object and the measuring equipment terminal is measured.
Reference junction compensation takes into account the terminal
temperature so that the object temperature can be directly read.
Appendix 2 Glossary
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