Lightning protection guide by OBO

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Last revision 2020

Vydal: OBO BETTERMANN s. r. o. Autor: OBO BETTERMANN

Strana 231 z 288

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If there mismatch, e. The critical point de- scribed the cut-off frequency fg.g. 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. From this point on- wards, the signal has lost 50% dB) its input power. Cut-off frequency fg The cut-off frequency describes the frequency-de- pendent behaviour the arrestors. The bandwidth generally defined as the width the frequency band where power damping less than dB. case open or short-circuited end cable, this can result the doubling cancellation the signal wave.TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 Insertion loss Return loss Diagram: Insertion loss and return loss measured using a network analyser. Signal amplitude Frequency Cut-off frequency db Cut-off frequency fg TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 231 Chapter The internal lightning protection system . Bandwidth The bandwidth (B) describes the difference mag- nitude between the two frequencies either end a frequency band. The data rate and bandwidth are often different from one another. Technically, the “data volume” is, however, fact the data rate. VSWR The (VSWR) Voltage Standing Wave Ratio the ratio between outgoing and reflected wave. The cut-off frequency determined according to certain measuring criteria. the absence any values, the cut-off frequency generally relates so- called systems. In data technology the bandwidth often described as the “data volume”. Capacitive and/or inductive component properties ensure signal damp- ing higher frequencies