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Glossary
Glossary
GlossaryĆ4
General purpose knob
The large frontĆpanel knob with an indentation. You can use it to
change the value of the assigned parameter.
Glitch positive trigger
Triggering occurs if the oscilloscope detects positive spike widths
less than the specified glitch time.
Glitch negative trigger
Triggering occurs if the oscilloscope detects negative spike widths
less than the specified glitch time.
Glitch either trigger
Triggering occurs if the oscilloscope detects either positive or negaĆ
tive spike widths less than the specified glitch time.
GPIB (General Purpose Interface Bus)
An interconnection bus and protocol that allows you to connect
multiple instruments in a network under the control of a controller.
Also known as IEEE 488 bus. It transfers data with eight parallel
data lines, five control lines, and three handshake lines.
Graticule
A grid on the display screen that creates the horizontal and vertical
axes. You can use it to visually measure waveform parameters.
Ground (GND) coupling
Coupling option that disconnects the input signal from the vertical
system.
Hardcopy
An electronic copy of the display in a format useable by a printer or
plotter.
High
The value used as 100% in automated measurements (whenever
high ref, mid ref, and low ref values are needed as in fall time and
rise time measurements). May be calculated using either the min/
max or the histogram method. With the min/max method (most
useful for general waveforms), it is the maximum value found. With
the histogram method (most useful for pulses), it refers to the most
common value found above the mid point. See Appendix B: AlgoĆ
rithms for details.
Holdoff, trigger
A specified amount of time after a trigger signal that elapses before
the trigger circuit will accept another trigger signal. Trigger holdoff
helps ensure a stable display.
Horizontal bar cursors
The two horizontal bars that you position to measure the voltage
parameters of a waveform. The oscilloscope displays the value of
the active (moveable) cursor with respect to ground and the voltage
value between the bars.