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SATELLIETTELEVISIE EN -RADIO ONTVANGST

SATELLIETTELEVISIE EN -RADIO ONTVANGST. ONTVANGSTTECHNIEK VIA SATELLIET. De outdoor unit. De outdoor unit. = wat buiten opgesteld wordt: parabolische reflector met de LNC Definiëren van kwaliteitsindicator:

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SATELLIETTELEVISIE EN -RADIO ONTVANGST

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  1. SATELLIETTELEVISIE EN -RADIO ONTVANGST ONTVANGSTTECHNIEK VIA SATELLIET De outdoor unit De outdoor unit HS/V1-2002

  2. De outdoor unit = wat buiten opgesteld wordt: parabolische reflector met de LNC Definiëren van kwaliteitsindicator: 10 log G/T in dB is het kwaliteitsgetal van het ontvanggedeelte. = 10 log G(dB) – 10 log (Ta + TLNC) Ta = ruistemperatuur van de reflector TLNC = ruistemperatuur van de LNC G = passieve versterking van de reflector in dB. De outdoor unit HS/V1-2002

  3. Berekeningsvoorbeeld: Geg: reflector diameter = 2m (46dB) ruist° reflector = 50K (tabel) ruist° LNC met ruisgetal 1dB = 75K Opl.: 10 log G/T = 46 - 10 log (50 + 75) = 46 - 21 = 25dB De outdoor unit HS/V1-2002

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