parameter units

Standard units of measure, which include the following:

Measured

Unit

Unit

Parameter

Name

Abbreviation

frequency

hertz

HZ

power

level

decibel relative to milliwets

dBm

power

ratio

decibel

dB

voltage

 

volt

v

time

 

second

 

electrical current

ampere

ii

impedance [resistance]

ohm

n

peak detection mode

The analyzer state where circuits calculate the peak value of a displayed signal. This value is determined by evaluating a series of measured values from an active trace.

peak detector

A detector that follows the peak or envelope of the signal applied to it. The standard detector in an analyzer is typically a peak detector. MIL-STD EM1 measurements usually call for peak detection. Refer also to quasi-peak detector and envelope detector.

percent amplitude modulation

A measure of the amount of amplitude modulation on a signal. The measurement value is a comparison of the power in the modulation signal to the power in the signal being modulated. Percent amplitude modulation can be calculated as follows, where dB is the ratio of the power of the signal to the power of the amplitude modulation sidebands

-dB %AM = 20021037-

persistence

See CRT persistence.

personality

Applications available on a memory card or other electronic media that extends the capability of an instrument for specific uses. Examples include digital radio personalities and cable TV personalities.

Glossary- 19