Scope and Multimeter Operations
General Reference (Testing Strategies)
150
Pressure Transducer
Electronic device that converts pressures
(negative/positive) to electrical signals.
Pulse
A signal with abrupt (fast) signal direction
changes in a positive or negative direction, with
consistent level and duration.
Pulse Period
One complete on and off cycle or time period.
Pulse Train
Collection of signal pulses traveling together.
Pulse Width (duration)
Measurement of a signals on time in a circuit that
pulses on and off. Specified in units of time.
Pulse Width Modulation (PWM)
A signal that continuously cycles on and off while
the on-time varies within each cycle.
RMS
The RMS (root mean square) value of alternating
currents and voltages is the effective current or
voltage applied, rather than the peak current or
voltage measurable. The AC RMS voltage value
can be defined as the equivalent DC voltage of
the AC voltage measured. RMS values are
commonly used in AC electrical measurement,
as they are more representative of DC
measurements.
Sample Rate
Number of times (frequency) the scope/meter
takes a sample of the signal. Specified in mega
samples per second (MS/s).
Sampling
Process of obtaining a sequence of
instantaneous values for a signal at regular or
intermittent intervals. When a quantity of samples
are collected the operational status of the device
is determined.
Screen Update Rate
How often the captured data is (updated)
displayed on the screen.
Signal
Detectable voltage, current, or magnetic field, by
which specific information is transmitted in an
electronic circuit or system.
Square Wave
A square or rectangular waveform (digital) which
alternately switches high to low (on/off) for
specific lengths of time, that has very fast rise
and fall times.
Sweep Scale
The horizontal scale on the grid. Also referred to
as time scale or x axis.
Term / Abbreviation
Description
Threshold
The threshold function automatically sets a
trigger and determines a threshold level in the
middle of the signal range (calculated from the
Min and Max measurements) to be used as a
reference point to calculate the measurement.
Trace
The actual visible line displayed on the scope
screen.
Trigger
A conditional function that initiates if and when a
trace is drawn on the screen.
Trigger Slope
The slope that a trigger source signal must reach
before the trigger circuit initiates a sweep.
VAC
Volts Alternating Current.
VDC
Volts Direct Current.
Vertical Scale
The vertical scale on the grid or (y-axis)
represents what is being measured (voltage,
amperage, pressure etc.), and the unit of
measurement it is being measured in.
Volt
Unit of electric potential difference.
Voltage
Electromotive force or potential difference,
expressed in volts.
Voltage (inductive) Kick
A voltage, many times higher than the applied
voltage, produced by the collapsing magnetic
field in a coil when the current through it is
abruptly terminated.
Waveform
The graphic representation (form) of a signal
over time, which the trace displays on the screen.
Zero Base Line
Reference setting or 0% level of a graph scale.
Term / Abbreviation
Description
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