d-coax logo

D-COAX, INC. • P.O. Box 999

Newberg, Oregon 97132  USA

All Products Made in USA



The sampling of a magnitude VS time whose interval makes a false repetition, and an inability to analyze data at that interval.



A device used to radiate or receiving radio waves.



Application Specific Integrated Circuit.



The start and stop frequency delta.



The ratio of the charge on one of the conductors of a capacitor to the potential difference between the conductors.


Clock frequency:

The master frequency of the periodic pulses that schedule the operation of a computer.


Common mode:

The same amplitude and phase at both inputs of a balanced transmission line. The energy imparted to ground when a balanced transmission line is not ideal.


Cross Talk: The measured unwanted coupling from one channel and another.


Current: The net transfer of electric charge per unit time. The rate of flow across a surface per unit time.


Cutoff Frequency:

is the place where the wavelength is able to fit once in the transmission line.



Electric current that flows in one direction only.



Electric current that reverses direction periodically, many times per second.



The ratio of 2 magnitudes. Also the ratio of a power to reference power.


Electrical length:

Unit of time required to travel in a transmission line.



Unwanted coupling that occurs between circuits.



Interference at high frequencies causing unwanted disturbance to other systems.



Measured in milliwatts. Differences expressed in dB.


EYE Pattern:

A specific plot denoting skew, Tr, skin effect, jitter, cross talk, insertion loss, resistance, common mode, simultaneously. (Other masks besides EYE are also common)



The number of cycles completed by a periodic quantity in a unit time.


Field lines:

A topological arrangement of electric and magnetic fields.


Gain: The increase in signal power.


Gating: To selectively pre-select a window of the magnitude VS time interval for close inspection used in a Fourier series to remove unwanted disturbances.


Ground: Electrical connection to a reference conducting plane. Provide a return path in a transmission system.


Group Delay:

The measured envelope of time VS frequency of a transmission line.



The AC characteristics of real and imaginary components.


Impedance matching:

Where the transmission line and the source are going to have minimum reflections and minimum distortions.



The ratio of the electromotive force to the rate of change of the current.


Insertion Delay:

The measured time it takes for a signal to pass completely through a transmission line usually referenced to the 50% points.


Insertion Loss:

The loss in power received at the load due to the transmission line.



The transfer point where energy transfers from one point to another.


Loss Tangent:

Energy lost in the dielectric partially due to the slower propagation compared to air.


Magnetic waves:

perpendicular to the electric wave.



The impedance of the source does not match the impedance of the transmission line.



A discontinuity caused by a wave traveling back into the source.



The opposition that a material offers to the flow of direct current, equal to the voltage drop across the material divided by the current through the material.



the real part of the complex impedance.



The frequency at which there is a sharp peak of power when a circuit contains inductance, capacitance, and resistance of specific values.


Return Loss:

The ratio between the incident power upon a discontinuity and the power reflected from the discontinuity.



A cyclic arrangement of alternating transients that are under damped but decreasing over time in amplitude and period.


Rise Time:

The transition time (usually 10% to 90%) when a signal is suddenly applied from a well-behaved source to a transmission line.



A conductive barrier.


Shielding effectiveness:

How much energy can be radiated.


Sine waves:

A wave whose amplitude varies as the sine of a linear function of time.



The delta in time of the signal traveling through more than one transmission line.


Skin effect:

The layer of the center conductor at which all the current is carried at a specific frequency.



The distribution of energy distributed over frequency.



The ratio of maximum amplitude to the minimum amplitude of a wave in a transmission line. (Standing Wave Ratio.)



Transverse electric, magnetic. Particular waves are propagated. Electric waves; transverse.



Time Delay Reflectometry.



Time Delay Through.



An engineered launch for least disturbance of energy.



The transfer of a signal from one location to another.


Transmission Line:

A system by which signals can be transferred between 2 or more points.


Velocity of propagation:

The speed at which a signal passes through a transmission line with respect to air.



Potential difference. Electromotive force. The difference in electric potential between 2 dissimilar nodes connected by a conductor.



The distance between 2 points having the same phase in 2 consecutive cycles in a periodic wave along a line in the direction of propagation.

Back to top