Glossary Of Common Terms - Snap-On Modis Ultra User Manual

Scope Multimeter
Duty % to Dwell Conversions
Duty Cycle
%
40
50
60
70
80
90
100

8.8.5 Glossary of Common Terms

Term / Abbreviation
AC
Aliasing
Amperage
Amplitude
Buffer
Cursor
Coupling AC
DC
Delta
Dropout
Duty cycle
Dwell
Dwell 60
Dwell 90
Filter
Frequency
Glitch
Grid
4 cyl
36.0
45.0
54.0
63.0
72.0
81.0
90.0
Alternating Current - electrical current that switches polarity at
regular intervals.
An effect that causes an incorrect signal to be displayed and/or
causes a trigger to malfunction, due to the input signal
exceeding the sample rate of the scope.
The strength of an electric current, expressed in amperes
Vertical magnitude (level or position) of a signal, or the varying
quantity from its zero value.
An electronic reservoir for temporary storage of data
Onscreen markers used to measure time, amplitude and
frequency
Function used to subtract the average value of a signal so that
small variations can be displayed in the waveform.
Direct Current - electrical current that flows in one direction
only
Difference in time between two events.
An intermittent or unwanted, vertical fall in a signal to zero that
may cause an undesired result.
Measurement of the length of a signals on time. Specified as a
percentage (ratio), of the total cycle time.
Used to measure a signals on time in degrees of dwell.
Commonly used to measure mixture control solenoids on
carbureted feedback engines and specified in duty cycle %.
Measurement of the length of a signals on time displayed on a
0 to 60 degree scale. 0° = 0%; 30° = 50%; 60° = 100%.
Measurement of the length of a signals on time displayed on a
0 to 90 degree scale. 0° = 0%; 45° = 50%; 90° = 100%.
Function used to filter or smooth out spikes and fast variations
in signals.
The number of times a signal repeats in one second.
Measured in Hertz (cycles per second).
An intermittent or unwanted, error in a signal that may cause a
false or undesired result.
The graph displayed on the scope screen that is made up of
the x and y axis scales that aid in the measuring of signal
characteristics.
115
Dwell
6 cyl
24.0
30.0
36.0
42.0
48.0
54.0
60.0
Description
General Reference
8 cyl
18.0
22.5
27.0
31.5
36.0
40.5
45.0