Measurement of Power Ramps of GSM, DCS1800 and PCS1900 Signals with Spectrum Analyzers of the R&S®FSE Family

TDMA communications systems like GSM, DCS 1800 or PCS 1900 make effective use of the frequency spectrum by assigning several subscribers to the same frequency channel. Each subscriber has access to one predefined time slot for transmitting information. With GSM eight subscribers share one frequency channel with a bandwidth of 200 kHz. In order not to disturb the other users of the 200-kHz channel it has to be ensured that, for instance, a mobile sends in the assigned time slot only and that no power is emitted by the transmitter at other times. For this reason the transmitter power is practically switched off in the transmission intervals.
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