LeCroy LSA1000, Operator'S Manual

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About the LSA1000
Analyze
The LSA1000 has the added ability to process and analyze data
on-board. Once the analog signal has been converted into
digital data, the data can be analyzed either by the LSA1000’s
internal digitizer processor or by an external computer. Most
current digitizers have a wide analysis spectrum built-in.
Depending on its options, LeCroy LSA1000s offer a selection of
the following analytical features.
Time Domain
The optional time domain waveform analysis package
— includes
summed averaging of up to one million sweeps, derivatives,
logarithm, square root, absolute value, ratio, six digital filters and
standard arithmetic operations.
Frequency Domain
Spectrum analysis greatly
extends the LSA1000’s processing power
and offers two clear advantages over FFT (Fast Fourier Transform)
analyzers: higher frequency components, and the ability to monitor
both time and frequency information. Fourier transform converts
sampled waveform information into a unique set of sine wave
components. The data is usually plotted as amplitude vs frequency,
exposing information not easily visible in the time domain (amplitude
vs time). Ideally, it can be used for such analyses as measuring
frequency components of communication signals and monitoring
drift in an oscillator. The frequency resolution of an FFT is directly
proportional to the number of time-domain points the FFT algorithm
can handle.
Statistical Domain
The existence of measured waveforms in digital representations
permits convenient use of the data inherent in those measurements.
As well as analysis of signals in the frequency domain and the ability
to perform mathematical operations and signal averaging on data,
trends can be determined and
histograms of the data analyzed.
The histogram is a graph of the distribution of values of a measured
parameter. For example, when measuring the risetime of a repetitive
signal for which all the measurements are equal, the histogram will
be a straight vertical line without breadth. However, variations in
risetimes create a plot with some horizontal structure, implying
variations in the measurements. Your LeCroy LSA1000 is able not