Glossary
112
TDS 200-Series Digital Oscilloscope User Manual
Pixel
A visible point on the display. The display is 320 pixels wide by
240 pixels high.
Pretrigger
The portion of the waveform record that contains data acquired
before the trigger event.
Real-Time Digitizing
A digitizing technique that samples the input signal with a
sample frequency of at least four times the oscilloscope
bandwidth. (TDS 200-series oscilloscopes sample at 10 times
the bandwidth or more.) Combined with (sinx)/x interpolation,
all frequency components of the input up to the bandwidth are
accurately displayed.
Record Length
The number of samples in a waveform.
Reference Waveform
A saved waveform selected for display.
RS-232
A serial communication port used to connect to a hard-copy
device, computer, controller, or terminal.
Sample Acquisition Mode
A mode in which the oscilloscope creates a record point by
saving a sample during each acquisition interval.
Sample Interval
The time interval between successive samples in a waveform
record. Changing the SEC/DIV control (the time base) changes
the sample interval. For real-time digitizers, the sample interval
is the reciprocal of the sample rate.
Sampling
The process of capturing an analog input, such as a voltage, at a
discrete point in time and holding it constant so that it can be
quantized.
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