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parameter units
Standard units of measure, which include the following:
Measured Unit
Parameter
Name
frequency hertz
power level
decibel relative to
milliwets
power ratio decibel
voltage volt
time second
electrical current ampere
impedance [resistance] ohm
Unit
Abbreviation
HZ
dBm
dB
v
ii
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