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Characteristics — Type 114
GLOSSARY OF TERMS
A circuit that has two stable states and
Bistable
(multivibrator)
requires two input pulses to complete a
cycle.
Calibrate
To check or correct the graduation ac
curacy of quantitative indicators.
An index position to which an otherwise
CAL (calibrated)
position
ungraduated control is set when a quanti
tative measurement must be made.
Catching or
Establishes the + or — extremity of a volt
clamping
age excursion.
diode
Count-down (of
A circuit, such as a bistable, whose output
consists of pulses fewer in number (usu
pulses) circuit
ally a submultiple) than the pulses applied
to the input(s).
Delayed pulse
A pulse occurring after a preselected in
terval following an event used as a time
reference point.
Generally, a narrow, delayed pulse.
Delayed trigger
For periodic pulses, the duty factor (often
Duty factor
(of pulses)
called duty cycle) is equal to the duration
(width) of a pulse divided by the pulse
period.
A pulse which opens a normally closed
Enabling pulse
electric gate, or otherwise permits an oper
ation for which a pulse input is a neces
sary condition.
An enabling pulse derived from a source
External trig
external to the circuit or equipment where
ger (pulse)
a particular operation requires an enabling
pulse with certain characteristics (time de
layed, duration, etc.).
The time required by pulse waveform to
Falltime
fall from 90% of its maximum value to
10% of its maximum value.
sarily equal to risetime.
hort-duration instability (of a signal); ran
Jitter
dom small departures from regularity.
Kilopulses per second.
KPP
Monostable
A circuit having one stable and one semi
stable state.
(multivibrator)
circuit into the semistable state, where it
remains for a predetermined time before
returning to the stable condition.
1-2
Not neces
A trigger pulse drives the
MPP
Megapulses per second.
When changing from one voltage level to
Overshoot
another, a momentary excursion greater
than the change desired.
PP
Pulses per second.
Preshoot
A small negative excursion immediately
preceding a positive-going pulse, or vice
versa.
The amplitude of a pulse is any term indi
Pulse amplitude
cating the magnitude of the pulse.
Pulse duration
The time interval between the first and
last instants at which the pulse voltage (or
current) reaches some specified percentage
of the peak voltage (or current) of the
pulse.
The pulse period in a sequence of periodic
Pulse period
pulses is the elapsed time between any
given point on one of the pulse waveforms
and the same point on the following pulse.
The number of periodic pulses that occur
Pulse Repeti
tion Frequency
in a given unit of time. Also expressed as
pulse repetition rate.
ee pulse duration.
Pulse width
Quiescent
At rest — specifically, the condition of a
circuit when no input signal is being ap
plied and/or no change is taking place.
Ramp voltage
A voltage waveform that rises at a steady
rate. For example, at 10 volts per second..
Ringing
High-frequency damped oscillations caused
by shock excitation of high-frequency res
onances, or, a damped oscillation in the
output signal of a system as a result of a
sudden change in the input signal.
Risetime
The risetime of a pulse is taken as the time
required for the leading edge of the pulse
to increase from 10% of its maximum
value to 90% of its maximum value.
ampling
A method that takes amplitude samples
system
from a repetitive input signal with each
sample at a progressively later time, then
reconstructs these samples into a replica of
the original waveform at a much lower
frequency.
Trigger
A signal that starts action in another
circuit.
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