1055497-1 Datasheet, PDF (302/320 Pages) Tyco Electronics – RF Coax Products

RF Coax Connectors
Appendix G - Glossary of Terms (Continued)
crimping head Tooling containing jaws and linkage for use in pneumatic
or hydraulic powered units to crimp loose-piece contacts/terminals that may
be too large for hand tool applications.
crimping tool A term commonly used to identify a hand held mechanical
device that is used to crimp a contact, terminal or splice.
crosstalk A magnetic or electrostatic coupling which causes the unwanted
transfer of energy from one circuit (disturbing circuit) to another circuit
(disturbed circuit)
current rating The maximum continuous electrical flow of current recom-
mended for a given situation. It is expressed in amperes.
cycle One complete sequence of values of an alternating quantity, includ-
ing a rise to maximum in one direction and return to zero; a rise to maxi-
mum in the opposite direction and return to zero. The number of cycles
occurring in one second is called the frequency.
D
daisy chain A cable assembly with common wires jumpering three or
more connections/connectors. The term is also used as a verb, implying to
connect in jumper manner.
dB Abbreviation — see decibel.
D.C. sparkover voltage defined as the maximum voltage across a
device before it discharges the energy to ground when subjected to a slowly
rising voltage ramp. A rate of rise of 100V/s is usually chosen for testing
purposes.
decibel A unit expressing the ratio of two voltages, currents or powers.
It is equal to 20 times the common logarithm of the ratio of two voltages
across or two currents through equal loads, or 10 times the common loga-
rithm of the two powers. One decibel is approximately the smallest change
in audible power that can be recognized by the human ear.
die closure Term used to designate a crimping area (crimping chamber)
when the dies are fully closed or bottomed. Die closure is checked with
go/no go plug gage to insure that the crimp produced by the tooling satis-
fies the crimp height specification.
dielectric A material that serves as an insulator. The amount of resistance
to voltage in a given insulation.
dielectric withstanding voltage The maximum potential gradient that a
dielectric material can withstand without failure.
discontinuity Rated interconnection: a broken connection (open circuit)
or the loss of a specified connection characteristic. Transient phenomena:
Short term (temporary) interruption or unacceptable variation in current or
voltage.
dissipation Unusable or lost energy, such as the production of unused
heat in a circuit.
distortion An unwanted change or addition to a signal or waveform when
it is amplified. This definition excludes noise which is an extraneous signal
superimposed on the desired signal.
dummy load A dissipative device used at the end of a transmission line
or waveguide to convert transmitted energy into heat, so essentially no
energy is radiated outward or reflected back to its source.
dust cap A device attached to a connector to provide protection against
dust and foreign debris.
E
electromagnetic compatibility (EMC) The ability of an electronic
device to operate in its intended environment without its performance being
affected by EMI and without generating EMI that will affect other equipment.
electromagnetic interference (EMI) Unwanted electrical or electro-
magnetic energy that causes undesirable responses, degrading performance
or complete malfunctions in electronic equipment. See also: noise.
electromotive force (emf) See voltage.
environmentally sealed A unit is provided with gaskets, seals, grom-
mets, potting or other means to keep out moisture, dust, air or dirt which
might reduce or impair its performance.
F
feedthrough A connector or terminal block, usually having double-ended
terminals, which permits distribution and bussing of electrical circuits. Also
used to describe a bushing in a wall or bulkhead, separating compartments
at different pressure levels, with terminations on both sides.
ferrule A short tube used to make solderless connections to shielded or
coaxial cable. Also molded into the plastic inserts of multiple contact con-
nectors to provide strong, wear-resistant shoulders on which contact retain-
ing springs can bear.
flange A projection extending from or around the periphery of a connector
and having holes that provide for mounting the connector to a panel or to a
mating connector.
frequency modulation (fm) A scheme for modulating a carrier fre-
quency in which the amplitude remains constant but the carrier frequency is
displaced in frequency proportionally to the amplitude of the modulating
signal. An fm broadcast is practically immune to atmospheric and man-
made interference.
fretting corrosion A form of excellerated oxidation that appears at the
interface of contacting materials undergoing slight cyclic relative motion. All
non-nobel metals (tin) are susceptible to some degree of fretting corrosion
and will suffer contact resistance increases.
front mounted A connector is said to be front mounted when it is
attached to the outside of the mating side of a panel. A front mounted con-
nector can only be installed or removed from the outside of the equipment.
G
gas discharge tube (GDT) hermetically sealed device containing an
inert gas.
GHz See gigahertz.
giga A prefix meaning one billion (10⁹).
gigahertz (GHz) One billion cycles per second (10⁹ cps).
glow mode condition in which the GDT continues to conduct after an
impulse passed. Characterized by a visible glow in the device caused by
over-heating.
ground A connection, intentional or accidental, between an electrical
circuit and the earth or some conducting body (e.g. chassis) serving in
place of earth.
H
heat-shrinkable A type of plastic material that has been cross-linked. A
term describing tubes, sleeves, caps, boots, films or other forms of plastic
which shrink to encapsulate, protect or insulate connections, splices, termi-
nations and other configurations.
hermetic Airtight, impervious to external influence, as in a hermetic pack-
age. Often used to describe metal-to-metal solder or weld-sealed packages.
302
Catalog 1307191
Revised 3-07
www.tycoelectronics.com
Dimensions are in millimeters
and inches unless otherwise
specified. Values in brackets
are standard equivalents.
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-1106-0803
South America: 55-11-2103-6000
Hong Kong: 852-2735-1628
Japan: 81-44-844-8013
UK: 44-8706-080-208