correction factor

The factor by which a measurement reading must be multiplied to correct for the effects of errors due to analyzer circuitry. This factor is the product of the ratio and phase-angle correction factors for the existing conditions of operation.

CRT persistence

An indication of the rate at which the image fades on the display. In analyzers that digitize the trace information (video) before writing it to the screen, the refresh rate is high enough to prevent any flicker in the display; therefore, short-persistence displays are used. Purely analog analyzers typically use long-persistence or variable-persistence displays because the refresh rate equals the sweep rate.

current probe

A magnetic Eeld sensor that is clamped around power lines to sense conducted emissions. It is the preferred transducer for most MIL-STD conducted emissions testing. The voltage at the output of the probe is proportional to the power line current and affected by probe characteristics. Probe characteristics are provided by the manufacturer in the form of transfer impedance, Z, which varies as a function of frequency. The equation below illustrates how probe characteristics may be stated:

Z(dBQ) = V(dBpV) - Z(dBpA)

default

The preset conditions, options, or parameters of an instrument. The default state may be changed by choosing key selections or writing programming commands to use other conditions.

delta marker

An analyzer mode in which a Exed reference marker is established, then a second active marker becomes available so it can be placed anywhere along the trace. A readout indicates the relative frequency separation and amplitude difference between the reference and active markers.

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