PROBE STATIONS • TEST SERVICES • CABLE ASSEMBLIES

Aliasing:

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

Antenna:

A device used to radiate or receiving radio waves.

ASICs:

Application Specific Integrated Circuit.

Bandwidth:

The start and stop frequency delta.

Capacitance:

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.

DC:

Electric current that flows in one direction only.

AC:

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

dB:

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.

EMC:

Unwanted coupling that occurs between circuits.

EMI:

Interference at high frequencies causing unwanted disturbance to other systems.

Energy:

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)

Frequency:

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.

Impedance:

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.

Inductance:

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.

Launch:

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.

Mismatch:

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

Reflection:

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

Resistance(DC):

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.

Resistance(AC):

the real part of the complex impedance.

Resonance:

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.

Ringing:

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.

Shielding:

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.

Skew:

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.

Spectrum:

The distribution of energy distributed over frequency.

SWR:

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

TEM:

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

TDR:

Time Delay Reflectometry.

TDT:

Time Delay Through.

Transition:

An engineered launch for least disturbance of energy.

Transmission:

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.

Voltage:

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

Wavelength:

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.

401 E. FIRST STREET | PO BOX 999 | NEWBERG, OR 97132 | PH: 503-922-2436 | FAX: 503-376-8237 | INFO@D-COAX.COM

HOME | COMPANY | TEST SERVICES | RESOURCES | CONTACT US

PRODUCTS: MODEL D14 | MODEL W4.0XL65 | MINI PROBE STATION | PROBES | SEMI-RIGID CABLES | FLEXIBLE CABLES

QUICK LINKS: CABLE BUILDER | REQUEST FOR QUOTE | ORDER PAGE

Back to top