A
Mounting devices that are used to attach a connector to a PCB or a panel.
A device that consist of two or more similar or different connectors as an interface between other connectors. The adaptor may be with interconnection of pin to pin or otherwise and may be filtered or unfiltered.
(Insertion loss) – The ratio at a given frequency between power levels at mating side to power level at termination side of a filtered connector. The most common method for insertion loss measurements is no-load insertion loss measurements in a 50 ohm system according to MIL-STD-220B. This ratio is expressed in decibels (dB) as follows:
Audio Frequencies (AF) – The frequency range up to 20kHz
B
Two contacts or conductors that conduct equal current magnitude but the current direction is opposite between them. See also Differential Mode.
A filter that passes frequency range which is defined by the half power points (-3dB) and attenuates frequencies outside this range.
The spectral frequency range of signal between lower to upper half power points (-3dB).
Powdered magnetic material used to absorb EMI at RF frequencies. See also Ferrite Suppressors Beads.
A linear scale of the amplitude in decibels (dB) vs. logarithmic frequency (Hz) scale that is used to show the attenuation carve.
C
A measured value (Farad, F) between filtered contact to connector shell that applies to the cut-off frequency and the ability to reduce electromagnetic interferences.
Coupling of a signal between two circuits due to discrete or parasitic capacitance between the circuits.
A contact with earth potential that is connected to the connector shell.
An intentional or unintentional current conducted through two contacts or more in the same direction and phase.
A filter for reducing common mode interference on balanced lines.
Electromagnetic Interference that is conducted by cables and through connector’s contacts from the equipment out.
The ability of equipment to function without degradation although electromagnetic interference is conducted through power or communication lines in side it.
The ability of material to conduct electrical current.
A phrase that described the contacts layout or coordinate, number and size based on commercial or military standard.
The diameter of a contact measured in AWG according to ASTM B 258: Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
The conducted and/or radiated path by which interfering energy gets from a source to a victim.
Termination of filtered connector designed to receive crimp contact. This option is part of aircrafts maintenance requirements for connectors and filtered connectors assembly without soldering on board.
Electromagnetic energy coupled from one circuit to the other through dielectric materials and interfering the circuits proper functioning.
D
A unit for expressing the insertion loss rate.
A wire pair that conduct current in the same magnitude but on opposite polarity.
A wire pair that conduct current in the same magnitude but on opposite polarity.
E
The magnitude of the electric field component of an electromagnetic wave expressed in units of volts per meter (V/m).
The ability of devices, unit of equipments, systems or subsystems to operate in their intended operational environments without suffering or causing unintentional unacceptable degradation because of EM radiation or response.
The impact of the electromagnetic environment upon the operational capability of military forces, equipment, systems, and platforms
Electromagnetic phenomena that may degrade the performance of electronic and electrical equipment. Also known as electromagnetic disturbance and electromagnetic noise.
A broadband, high-intensity, short-duration burst of electromagnetic energy.
A momentary discharge of high voltage with low energy.
The unwanted inductive byproduct of electrical component is determined by his mechanical dimensions, terminals and mounting technique
The unwanted resistive byproduct of electrical component is determined by his mechanical dimensions, terminals and mounting technique.
F
A metallic enclosure that designed to block emission of electromagnetic field from and into electrical equipment.
A metallic enclosure that designed to block emission of electromagnetic field from and into electrical equipment.
A common term for describing an unfiltered contact in a Filtered Connector.
Powdered magnetic material used to absorb EMI at RF frequencies.
A circuit designed to block frequency band yet allow signals pass at frequencies out side this band. In most cases, filtered connectors consist of low pass filters that transmit energy below the cut off frequency.
An array of filtered feed-troughs designed to be mounted on a panel with specific mechanical dimensions.
The number signal repetition per one second, measured in Hertz (Hz).
G
A contact with earth potential but not connected to the connector shell.
H
A connector designed to block gas leak up to 10-5cc/s under high pressure.
The unit for expressing frequency. One hertz equals one cycle per second. Commonly used multiples are kilo-hertz (kHz), megahertz (MHz), and gigahertz (GHz).
A connector with multiple contacts in a small shell size, designed by using smaller contacts gauge and by grouping the contacts.
I
The ability of a device, unit of equipment, or systems to perform without degradation of quality in the presence of electromagnetic disturbance.
The sum of pure Direct Current Resistance, RDC, and Alternate Current Resistance that created by inductive or capacitive elements and appeared across electrical component or transmission lines, measured in Ohm (?).
The value of inductive component measured in henries (H),
A passive component assembled in series on the filtered contact to achieve or create low-pass filter and block EMI/RFI.
The inner part of the connector that keeps proper contact position per correlative arrangement.
The ratio at a given frequency between power levels at mating side to power level at termination side of a filtered connector. The most common method for insertion loss measurements is no-load insertion loss measurements in a 50 ohm system according to MIL-STD-220B. This ratio is expressed in decibels (dB) as follows:
The resistance value between contacts to each other and/or between contacts and ground. The most common method for insulation resistance measurements is method 302 according to MIL-STD-220B. This parameter depends on the applied test voltage and measured in M? (Mega-Ohm) or ?F (Ohm-Farad), meaning, the resistance value in ? multiplied by the capacitance in F.
J
A connector that is designed for mounting through single D cut hole on the enclosure panel and tightened to the panel by supplied nut.
M
The magnitude of the magnetic field component of an electromagnetic wave expressed in units of amps per meter (A/m).
A statistical value that defines the reliability of the filtered connector and its components.
A United State Department of Defense (US DoD) published document that describes the required specification.
A United State Department of Defense (US DoD) published document in order to define the requirements for military test method, communication protocols, power limits, insert arrangements and other standards.
A component that is used to clamp short duration and low energy transients. The MOV may be integrated into a filtered connector or into standard connector for transient protection capability.
A capacitor that is consist of metal layers and dielectric material layers between them.
P
A multilayer ceramic capacitors array, designed with holes as signal terminals and usually one grounding terminal, for filtering commercial or military standard connectors.
The coat of the connector in use to provide conductivity between the metallic shell and the equipment enclosure for better filter performance.
Mates with receptacle connectors design to be assembled on cable side and not on the equipment panel. Usually, in D-Subs connectors, the plug is defined as a female contacts connector.
The mechanical slots inside the connector’s mating side that keep mating in the right position and ensure right mating of connectors when identical inserts arrangements mounted on the same equipment. Also known as keying.
The materials, usually epoxy cast, in the back side of a connector that ensures sealing and mechanical strain to the filter and contacts.
The maximum power that the transient protection components can absorb without failing
R
The electromagnetic field radiated from the equipments enclosure outside and might cause electromagnetic interference.
The ability of equipment to function properly in electromagnetic environment without any degradation.
The RF region is defined as extending from 3kHz to 300GHz.
A connector designed for panel mounting but may be connected to a cable in order to join with mating plug connector.
The time duration of signal to rise from 10% to 90% of its initial voltage level.
The effective value, or the heating value, of a periodic EM wave. The rms value for E or H fields is obtained by taking the square root of the mean of the squared values for E or H over an area equivalent to the vertical cross-section of the human body (projected area).
S
The metal body of a connector that contains the insert, the contacts and the filter is inserted into.
A metallic cover or jacket designed for screening electromagnetic field that are radiated from or on PCB, wires and other conductors .
A termination type designed for wires soldering.
A high frequency oscillatory variation from the steady-state level of the line characteristic. Spikes are low energy transient caused by reactive loads switching with duration of less than 50 microseconds (?s) up to one millisecond (ms) to decay to the steady-state level.
A technology of assembling electrical components on PCB surface without Through-Hole drills. The electrical components in this technology are smaller and have low ESL and ESR and, therefore, have better performances at RF.
A variation from the steady-state level of the line characteristic. Surges are high energy transient caused by lightning, switching and other phenomenon with duration greater than 1ms and have a recovery time limitation.
T
A conductive connection for soldering to wire or PCB in the back side of the connector.
The type of terminal at the rear side of the connector. It may be Straight of PCB, Right Angle for PCB or Solder Cup.
Processes that simulate rapid temperature changes in order to ensure connector sealing and functionality at harsh environment conditions.
A change in the conditions of the line characteristic beyond the steady-state limits that returns to and remains within the steady-state limits within a specified time. The transient may take the form of either a surge or a spike.
An array of components integrated into the connector in order to clamp a momentary undesired over-voltage.
V
Voltage loss created due to resistance by the receptacle connector contacts and plug connector contacts.
W
A connector with mounting flanges mounted inside of a panel or box.
The maximum continuance DC voltage that may be applied on the filter capacitance without damaging the filter.
Also known as operational voltage, rated voltage and voltage rating.
