Page 33 - NOISE IN SYSTEM COMMUNICATION
P. 33
THE DIFFERENCES BETWEEN
NOISE FACTOR AND NOISE FIGURE
NOISE FIGURE (NF)
DEFINITION
Noise Figure is simply the Noise Factor expressed
in decibels (dB). It provides a logarithmic measure
of the noise introduced by a device.
FORMULA
VALUE
Since the Noise Factor is represented
logarithmically, the Noise Figure is always larger
than or equal to 0 dB. An ideal device with no
added noise has a Noise Figure of 0 dB.
UNIT
The Noise Figure is expressed in decibels (dB).
23
