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en:signal_processing [2021/04/17 13:58]
mb angelegt
en:signal_processing [2021/04/17 14:00] (aktuell)
mb
Zeile 5: Zeile 5:
  
 ===== Bandwidth control ===== ===== Bandwidth control =====
-The term **[[selectivity]]** refers to the ability of a receiver to receive a signal next to another signal without interference or to separate two signal ​in very close neighborhood ​in the dial.+The term **[[selectivity]]** refers to the ability of a receiver to receive a signal next to another signal without interference or to separate two signals ​in very close neighborhood ​on the dial.
  
 In the shortwave range, the radio stations in the shortwave broadcast bands are located quite close to each other, usually with a channel spacing of 5 kHz. A transmitter in the next channel 5 kHz up or down to the desired frequency can strongly impair the signal, an unpleasant whistling tone will occur with a pitch of 5 kHz. On medium waves, this phenomenon is less a problem with a channel spacing of 9 kHz (internationally) or 10 kHz (in the USA), on VHF with a channel spacing of 50/100 kHz, adjacent channel interference is only a problem with extremely weak signals in the vicinity of a very strong signal "​booming in". In the shortwave range, the radio stations in the shortwave broadcast bands are located quite close to each other, usually with a channel spacing of 5 kHz. A transmitter in the next channel 5 kHz up or down to the desired frequency can strongly impair the signal, an unpleasant whistling tone will occur with a pitch of 5 kHz. On medium waves, this phenomenon is less a problem with a channel spacing of 9 kHz (internationally) or 10 kHz (in the USA), on VHF with a channel spacing of 50/100 kHz, adjacent channel interference is only a problem with extremely weak signals in the vicinity of a very strong signal "​booming in".
en/signal_processing.1618660725.txt.gz · Zuletzt geändert: 2021/04/17 13:58 von mb