pico Technology PicoScope 2203, Руководство пользователя

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Glossary
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Signal generator—Generates a waveform and outputs it on the BNC socket marked
Signal Out. This output can be used to drive a test signal through a BNC cable into
an external circuit or into one of the oscilloscope's input channels. The PicoScope
software allows the generator to output standard waveforms, such as sine and square
waves, or arbitrary waveforms defined by the user.
Streaming mode—A data collection mode in which the oscilloscope samples data and
returns it to the computer in a continuous stream. This mode allows the capture of
more data than will fit in the oscilloscope's memory buffer, at sampling rates up to
13.3 million samples per second. The PicoScope program selects this mode for long
timebases to enable the capture of very long sets of data.
Timebase—A timer that controls the speed at which the scope device captures data.
At slow timebases this process is visible as PicoScope draws the trace across the
scope view from left to right, but at fast timebases PicoScope draws the whole trace in
a single operation. The timebase is measured in units of time (such as seconds) per
division. There are ten divisions across the scope view, so the total time across the
width of the view is ten times the "per division" setting.
USB 1.1—Universal Serial Bus (Full Speed). This is a standard port used to connect
external devices to PCs. A typical USB 1.1 port supports a data transfer rate of 12
megabits per second, so is much faster than an RS-232 or 'COM' port.
USB 2.0—Universal Serial Bus (High Speed). This is a standard port used to connect
external devices to PCs. A typical USB 2.0 port supports a data transfer rate 40 times
faster than USB 1.1 when used with a USB 2.0 device, but can also be used with USB
1.1 devices.
Vertical resolution—A value, in bits, indicating the precision with which the
oscilloscope converts input voltages to digital values. Oversampling (see above) can
improve the effective vertical resolution.
Voltage range—The range of input voltages that the oscilloscope can measure. For
example, a voltage range of ±100 mV means that the oscilloscope can measure
voltages between -100 mV and +100 mV. Input voltages outside this range will not
be measured correctly, but will not damage the instrument as long as they remain
within the protection limits of ±100 V.