18WuD2x

620 sequential • series equivalent of parallel circuit
(e.g., records in a file) are taken in an order determined
by key values, rather than in the order in
which the items are physically arranged.
sequential access memory Any semiconductor
memory in which data can be recalled or addressed
only in a certain specified order.
sequential analysis In statistics, using an unspecified
number of observations as samples from
which a result is derived. Each observation is
accepted or rejected, or another observation is
made.
sequential color television The successive transmission
of the three primary colors in a television
system, and their reproduction at the receiver in
the same order. Also see DOT-SEQUENTIAL SYS-
TEM, FIELD-SEQUENTIAL SYSTEM, and LINE-
SEQUENTIAL SYSTEM.
sequential control Computer operation in which
the order of instruction implementation is the
same as the order of instruction storage.
sequential relay See SEQUENCE RELAY.
sequential scanning Rectilinear television scanning
in which the center-to-center distance between
successive lines is the same as the nominal
line width.
sequential switch 1. A switch that provides selection
of two or more ports in a rotating succession.
2. In a television system, a switch that allows the
monitoring technician to select any of the cameras
for viewing.
sequential timer See SEQUENCE TIMER.
ser 1. Abbreviation of SERIES. 2. Abbreviation of
SERIAL.
serial 1. Pertaining to the performance of steps, or
the occurrence of elements (such as data items
on magnetic tape), in succession. 2. An order,
row, or sequence in which one item follows another
(as opposed to parallel).
serial access Access to data file records in their order
in a storage medium.
serial adder See SERIAL ARITHMETIC UNIT.
serial arithmetic unit In computer operations, an
arithmetic unit in which digits are handled in order.
Compare PARALLEL ADDER.
serial bit Data in which the bits of each byte or
word are sent or received one at a time.
serial memory A register in which the input and
output data is stored and retrieved one bit at a
time.
serial-parallel 1. Pertaining to data transfer that is
serial in one sense and parallel in another sense.
For example, entire words might be serially transmitted
within a system, but the constituent bits
of each word might be transferred in parallel.
2. See PARALLEL-SERIES.
serial processing In computer operations, the sequential
processing of several different programs
through a single channel. Compare PARALLEL
PROCESSING.
serial storage In computer operation, storage in
which elements are entered in order and are
available only in the same order. Compare PAR-
ALLEL STORAGE.
serial transfer The propagation of information
along a single path, in which data bits are sent
one after the other.
series 1. The sum of a mathematical sequence (see
SEQUENCE, 2). 2. Pertaining to the connection
of elements or components end-to-end (see SE-
RIES CIRCUIT).
series addition See SERIES-AIDING.
series-aiding The condition in which two series
voltages or magnetic fields are added together.
Compare SERIES-BUCKING.
series antenna tuning Antenna-feeder tuning in
which a separate tuning capacitor is connected in
series with each wire. Compare PARALLEL AN-
TENNA TUNING.
Two-wire
line
Input
series antenna tuning
series bucking The condition in which two series
voltages or magnetic fields oppose each other.
Compare SERIES-AIDING.
series capacitance Capacitance acting, or connected,
in series with another capacitance or
other quantity.
series capacitors Capacitors connected in series.
If the individual capacitors have values C1, C2,
. . . , Cn, then the total capacitance Ct is equal to
1/(1/C1 + 1/C2 + . . . + 1/Cn). Also see SERIES
CIRCUIT.
series circuit A circuit whose components are, in
effect, connected in a string (i.e., end-to-end).
Compare PARALLEL CIRCUIT.
series-diode half-wave rectifier See SERIES-
DIODE RECTIFIER.
series-diode rectifier A rectifier circuit in which
the diode is connected in series with the source
and load. Compare SHUNT-DIODE RECTIFIER.
series dropping resistor See DROPPING RESIS-
TOR.
series equivalent impedance A series impedance
that will draw the same current (magnitude and
phase) drawn by a given parallel circuit connected
across the same single-phase source.
series equivalent of parallel circuit
EQUIVALENT IMPEDANCE.
See SERIES