Glossary
M
Metadata
Data that describes other data. Metadata exists at file, test and channel level.
N
Noise
The entirety of random frequencies that disturb the perception of the expected signal. You can eliminate noise
with low-pass filters that let frequencies below a specified threshold pass and eliminate the frequencies above.
P
Passband
The range of frequencies or wavelengths that can pass through a filter.
Poisson's Ratio
Defined by the division of the transverse strain εt and the longitudinal strain εl.
Polynomial
A scaling type that defines a non-linear characteristic represented by adjacent polynomial segments P1, P2, etc.
that start in (x1|P1(x1)), (x2|P2(x2)), etc., and go as far as the electrical range xR.
Pre-trigger
The time before the system triggered. When the other recording parameters are set correctly, this will result in
a history of stored digital data.
R
Recording (noun)
A file (or set of files) that contains the data and all associated metadata that is acquired during a recording ses-
sion. In HBK ADVANTAGE, recordings are saved in .bkc format.
Recording (verb)
The act of collecting data for storage, playback, analysis or sharing.
S
Sample Rate
Defines how data are sampled for the recording file. It can be defined for each channel separately.
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