User's Manual

Appendix
BreezeNET PRO.11 Series 8-13 User’s Guide
The following diagram depicts a typical radio system:
Figure 9.6: A Typical Radio System
A radio system transmits information to the transmitter. The information is
transmitted through an antenna which converts the RF signal into an
electromagnetic wave. The transmission medium for electromagnetic wave
propagation is free space.
The electromagnetic wave is intercepted by the receiving antenna which
converts it back to an RF signal. Ideally, this RF signal is the same as that
originally generated by the transmitter. The original information is then
demodulated back to its original form.
8.4.2. RF Terms and Definitions
dB
The dB convention is an abbreviation for decibels. It is a mathematical
expression showing the relationship between two values.
RF Power Level
RF power level at either the transmitter output or the receiver input is
expressed in Watts. It can also be expressed in dBm. The relation between
dBm and Watts can be expressed as follows:
P
dBm
= 10 x Log P
mw