1055497-1 Datasheet, PDF (303/320 Pages) Tyco Electronics – RF Coax Products

RF Coax Connectors
Appendix G - Glossary of Terms (Continued)
hermetic seal Hermetically sealed connectors are usually multiple contact
connectors where the contacts are bonded to the connector by glass or other
materials and permits maximum leakage rate of gas through the connector of
1.0 micron ft./hr. at one atmosphere pressure for special applications.
hertz (Hz) International standard term for cycles per second. Named after
the German physicist Heinrich R. Hertz (e.g., 60 cycles per second is equal
to 60 hertz or 60 Hz).
I
interference An electrical or electromagnetic disturbance that causes
undesirable response in electronic equipment.
J
jack A connecting device into which a plug can be inserted to make circuit
connections. The jack may also have contacts which open or close to per-
form switching functions when the plug is inserted or removed. See also:
receptacle.
impedance (Z) The total opposition offered by a component or circuit to
the flow of alternating or varying current. Impedance is expressed in ohms
and is similar to the actual resistance in a direct current circuit. In computa-
tions, impedance is handled as a complex ratio of voltage to current.
impedance match A condition in which the impedance of a component
or circuit is equal to the internal impedance of the source, or the surge
impedance of a transmission line. This gives maximum transfer of energy
from the source to the load, as well as minimum reflection and distortion.
impulse discharge current
I
is defined as the peak current of an 1-0
0-9
B
impulse which the device can with-
stand ten times (5 of each polarity at ^0-5
fixed time intervals) without sub-
A
stantially affecting device perform-
ance. The test normally used to
0-1
0 ₀₁
T
determine this capacity uses the
T1
T2
8/20ms waveform as depicted below
where T1=8ms and T2=20ms.
T1= _1.25T t
impulse sparkover voltage
V
defined as the maximum level
1.0
0.9
8
of voltage across a device before it
discharges the energy to ground
0.5
when subjected to a voltage impulse. ^{0.3 A}
The three common waveform profiles 0
used to determine this capacity are:
T01 ^T
TL
T2
t
T2 =1.67T
L
line impedance Impedance as measured across the terminals of a trans-
mission line; frequently the characteristic impedance of the line.
M
matched impedance The coupling of two circuits in such a way that the
impedance of one circuit equals the impedance of the other.
mate Two join two connectors in a normal engaging mode.
maximum discharge current defined as the peak current of an impulse
which the device can withstand once without substantially affecting device
performance.
mega (M) A prefix meaning one million (10⁶).
microwave That portion of the electromagnetic spectrum lying between
the far infrared and conventional radio frequency range. The microwave fre-
quency range extends from 1 GHz to 300 GHz. Microwaves are usually used
in point-to-point communications because they are easily concentrated into
a beam.
Military Specification Military requirements. The demand imposed
upon a system to meet a military operational need.
mismatch The condition in which the impedance of a source does not
match or equal the impedance of the connected load. This reduces power
transfer by causing reflection.
inductance One cause of reactance. An electromagnetic phenomenon in
which the expanding and collapsing of a magnetic field surrounding a con-
ductor or device tends to impede changes in current. The effects of induc-
tance become greater as frequencies increase. The basic unit for inductance
is the henry.
input impedance The impedance that exists between the input terminals
of an amplifier or transmission line when the source is disconnected. The
circuit, signal level and frequency must be specified.
insertion loss The loss in load power due to the insertion of a compo-
nent, connector or device at some point in a transmission system. Generally
expressed in decibels as the ratio of the power received at the load before
insertion of the apparatus, to the power received at the load after insertion.
insulation crimp The area of a terminal splice or contact that has been
formed around the insulation of a wire.
insulation grip The ability of certain crimped terminals to hold firmly in
place both the conductor and a small portion of insulation. This prevents
the conductor from being exposed due to insulation receding away from
the terminal.
insulation resistance The electrical resistance between two conductors
separated by an insulating material.
interface The two surfaces of a multiple-contact connector that face each
other when the connector is assembled.
N
narrow-band EMI generated from a device operating at a specific and
limited range of frequencies. See also: electromagnetic interference (EMI).
N Connector A large radio frequency connector covered by Military
Specification. It has an impedance of 50 ohms and is designed to operate in
the 0 to 11 GHz frequency range. It has a threaded coupling and is physi-
cally larger than a TNC connector.
noise An extraneous signal in an electrical circuit, capable of interfering
with the desired signal. Classes of noise include burst of popcorn noise,
intermediate frequency noise at low audio frequencies, white (thermal)
noise, etc. Signals from power supply or ground line coupled into an ampli-
fier output may be considered noise.
O
“O” crimp An insulation support crimp for open barrel terminals and
contacts. In its crimped form it resembles an “O” and conforms to the shape
of the round wire insulation. “O” crimp is also used to describe the circum-
ferential crimps used on COAXICON ferrules.
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
303
South America: 55-11-2103-6000
Hong Kong: 852-2735-1628
Japan: 81-44-844-8013
UK: 44-8706-080-208