Tektronix 11801C User Manual page 433

11801C User Manual
Smoothing
Processing applied by the sampling head prior to the digitization of a
trace, to reduce apparent noise. With smoothing, the sampling head
samples the signal 8 times instead of once, and the average of the
samples is then used by hardware measurements and the digitizing
circuitry.
Statistical Measurement
An automated measurement that is derived from color graded waveform
data and is based on histograms computed at the crossing levels. A
statistical measurement can be selected only in color graded display
mode.
Stored Trace
A collection of sampled points that constitute a single trace acquisition
that is saved in memory.
Time Base
The time dependent specifications that control the acquisition of a trace.
The time base determines when and how long to acquire and digitize
signal data points.
Time Domain Reflectometry (TDR)
A method of characterising a transmission line or network by sending a
signal from one end and monitoring the electrical reflections.
Trace
The visible representation of an input signal or combination of signals.
Identical to waveform.
Trace Expression
The definition of what the trace displays. It can include one or more
channels combined arithmetically and modified by functions.
Trace Number
A number assigned by the 11801C to identify a trace. Displayed traces
are numbered 1 through 8. A new trace is always given the lowest
available number.
Tracking
The process of automatically adjusting the measurement parameters or
window position to reflect changes in the trace.
Trigger
An electrical event that initiates acquisition of a trace as specified by the
time base.
Uptime
The number of hours the instrument has been powered on.
Vertical Description
see Trace Expression
Waveform
The visible representation of an input signal or combination of signals.
Identical to trace.
Glossary
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