Operating Instructions—Type 324
Sweep Generator—A unit that generates a signal used as an
independent variable; the signal is usually a ramp, chang
ing amplitude at a constant rate.
Sweep Holdoff—An interval immediately following a hori
zontal sweep, during which time the sweep is prevented
for recurring while the circuits stabilize to their quies
cent condition.
Sweep Linearity—Maximum displacement error of the
independent variable between specified points on the
display area.
Sweep Rate—The time required per division of trace move
ment (T IM E /D IV ).
Termination—The load present at the output of a circuit,
device, or transmission line. Commonly identifies a de
vice which terminates a transmission line with a specific
impedance.
T ilt—Deviation of the upper and/or lower flat surfaces of a
square wave or pulse from the horizontal.
T IM E /D IV —The time required for the spot created by the
electron beam to move 1 division. Commonly used in
reference to horizontal sweep.
Time Base—The sweep generator in an oscilloscope.
Trace—The cathode-ray tube display produced by a moving
spot.
Trace W idth—The distance between two points on opposite
sides of a trace at which the luminance is 50% of maxi
mum.
Transient Response—The name of a number of character
istic time-domain reactions to abruptly-applied inputs.
Transient—A damped oscillation or pulse occurring in a cir
cuit in response to a change in input.
Transition—A voltage shift; commonly refers to the step
function of a square wave.
Trigger—A pulse used to initiate some function. In oscillo
scopes, commonly refers to the signal which initiates the
horizontal sweep.
Triggered Sweep—A sweep that can be initiated only in
response to a trigger, as opposed to a free-running sweep.
Triggering Level—The instantaneous value of voltage of an
input signal required to generate a trigger.
Triggering Signal—The signal from which a trigger is de
rived.
Triggering Slope—The direction of change (+ or —) of trig
gering signal voltage from which a trigger is to be de
rived.
Unblanked—The condition existing when the electron beam
is permitted to strike the face of the cathode-ray tube.
Vertical Am plifier—An amplifier for signals intended to
produce vertical deflection.
Vertical Deflection—Vertical movement of the electron
beam.
Vertical Displacement—The amount of space between the
vertical reference and actual trace positions.
Vertical Gain—The ratio of the amplitude of the output
signal from the vertical amplifier to the amplitude of the
vertical input signal.
Vertical Input Signal—The signal applied to the oscilloscope
vertical input connector.
V O L T S /D IV —The ratio expressing the deflection factor of
the oscilloscope. In front panel control nomenclature, it
is the number of volts required to cause one division of
vertical deflection.
X -Y Display—A rectilinear coordinate plot of two variables.
Z Axis—The third dimension of a display. Commonly
implemented in oscilloscopes as beam intensity (display
brightness) variations.
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