HP 8530A, Руководство по эксплуатации и программированию, Страница: 412 / 439

Glossary
A ctive
The term \active" has two special meanings in HP 8530A documentation:
\A ctive function" refers to the last feature you activated that requires a numeric value.
When you turn the front panel knob , use the step keys , or enter a numeric value , the HP
8530A changes the active function.
F or example , pressing 4 ST ART 5 makes it the active function. Any value changes or entries
will aect that function. Start will remain the active function until you select another
function that requires a numeric value. Pressing 4
ENTRY OFF
5 causes the analyzer to
remove the function from active status . The knob , step keys , and numeric entry keys will
no longer have any eect. 4
ENTRY OFF
5 protects the instrument from accidental value
changes . Such changes occur most commonly when someone accidentally moves the
knob .
When the term \active" is used next to multiple-choice functions (\active parameter ,"
\active channel," \active marker ," and so on), it is referring to the most recently used
choice in that multiple-choice function. Thus , \active parameter" refers to the most
recently used parameter .
Here is an example: Assume you want to use the Redene P arameter feature to modify a
parameter . Redene P arameter aects the \active" parameter . Thus , you should activate
P ARAM 1 before using the Redene P arameter feature .
The terms \active" and \currently-selected" mean the same thing in HP 8530A
documentation.
A ctive Channel
The term \active channel" refers to the channel that was activated last. When you select a
parameter , change measurement settings , and so on, you aect the active channel. In the
same way , only one parameter (P ARAM 1, P ARAM 2, P ARAM 3, or P ARAM 4) can be the
active parameter at any given time . The same applies to markers .
A UT
A UT is an acronym which stands for Antenna Under T est.
Antenna Denition
An antenna denition is one of seven individual data sets inside a cal denition. Each
antenna denition has the gain values for a specic standard gain antenna. See \Cal
Denition," below .
Cal
\Cal" is an abbreviation for calibration.
Cal Denition
A \cal denition" is a data set that contains the published gain data for up to seven
standard gain antennas . A cal denition is composed of a four-line header , and up to seven
individual data sets called antenna denition. See \Antenna Denition," above .
Glossary-1