Supplemental notes
for the review of Ch 3.
High pass aka low cut
Low pass aka high cut
The spike or raised area on any graph shows the BLOCKED
frequencies.
Chapter 4 start
Gain and Loss
Understanding RF signal transmission involves the strength
or power with which the transmitter is sending out the signal, the amount of
reduction in signal strength caused by cables, connectors, and other
components, the transmission medium and the minimum strength of the signal
required by the receiver to be able to properl recover the data sent by the
transmitter.
An amplifier boosts the power of a signal, called a
gain. Cables and connectors offer a
resistance to the flow of electricity and tend to decrease the power of a
signal (loss). Signal power changes
logarithmically and gains and loss are relative concepts. You need to know the power level of the
signal at two different points.
