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Insertion loss
Return loss
Diagram: Insertion loss and return loss measured using
a network analyser.
If there mismatch, e.
Cut-off frequency fg
The cut-off frequency describes the frequency-de-
pendent behaviour the arrestors.
In data technology the bandwidth often described
as the “data volume”. Capacitive and/or
inductive component properties ensure signal damp-
ing higher frequencies. From this point on-
wards, the signal has lost 50% dB) its input
power. The cut-off frequency determined according
to certain measuring criteria.
Bandwidth
The bandwidth (B) describes the difference mag-
nitude between the two frequencies either end a
frequency band. The bandwidth generally defined
as the width the frequency band where power
damping less than dB. The data rate and
bandwidth are often different from one another.g. the absence any
values, the cut-off frequency generally relates so-
called systems.
VSWR
The (VSWR) Voltage Standing Wave Ratio the ratio
between outgoing and reflected wave. case open or
short-circuited end cable, this can result the
doubling cancellation the signal wave. Technically, the “data volume”
is, however, fact the data rate. The critical point de-
scribed the cut-off frequency fg. Standing
waves can occur if, for example, there terminat-
ing impedance the cable, two cables differ-
ent impedances are connected together, for example
a Ohm coaxial cable with Ohm coaxial cable.
Signal amplitude
Frequency
Cut-off frequency db
Cut-off frequency fg
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231
Chapter The internal lightning protection system
