Uitwerking exameneisen examen Zendamateur N/F

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Uitwerking exameneisen examen Zendamateur N/F 3.7 Phase Locked Loop (PLL) ....................................................................................................... 44 Pagina 96 Regellus met fasevergelijkschakeling ............................................................................................ 44 Regellus met instelbaar deeltal ..................................................................................................... 44 Filter in de regellus ........................................................................................................................ 44 Modulatie in de VCO ..................................................................................................................... 44 3.8 Mengtrap ............................................................................................................................... 44 Mengtrap met transistor, JFET of dioden ...................................................................................... 44 Som- en verschilmenging, spiegelfrequentie ................................................................................ 45 Amplitudemodulator ..................................................................................................................... 45 Balansmodulator ........................................................................................................................... 45 3.9 Digitale signaalverwerking .................................................................................................... 45 FIR en IIR filter blokschema ........................................................................................................... 45 Fourier transformatie (grafische weergave) ................................................................................. 45 DFT ............................................................................................................................................. 45 FFT ............................................................................................................................................. 45 Directe digitale frequentiesynthese (DDS) .................................................................................... 46 4 Ontvangers .................................................................................................................................... 47 4.1 Uitvoering .............................................................................................................................. 47 Enkelsuperheterodyne ontvanger [N] ........................................................................................... 47 Dubbelsuperheterodyne ontvanger .............................................................................................. 47 Directe conversie / rechtuitontvanger [N] .................................................................................... 47 4.2 Blokschema’s ......................................................................................................................... 47 CW ontvanger [A1A] [N] ................................................................................................................ 47 AM-ontvanger [A3E] [N] ................................................................................................................ 48 EZB-ontvanger [J3E] [N] ................................................................................................................. 48 FM-ontvanger [F3E] [N] ................................................................................................................. 48 4.3 Werking en functies van de volgende schakelingen [blokschema] ....................................... 49 HF-versterker [smalband of breedband] [N] ................................................................................. 49 Oscilator [vast of variabel] [N] ....................................................................................................... 49 Mengtrap [N] ................................................................................................................................. 49 Middenfrequentversterker [N] ...................................................................................................... 49 Begrenzer ...................................................................................................................................... 49 Detector [N] ................................................................................................................................... 50 Zwevings-oscilator [BFO] [N] ......................................................................................................... 50
Uitwerking exameneisen examen Zendamateur N/F Productdetector ............................................................................................................................ 50 LF-versterker [N] ............................................................................................................................ 50 Automatische versterkingsregeling [AVR/AVC] [N] ....................................................................... 50 S-meter .......................................................................................................................................... 50 Ruisonderdrukker [squelch] [N] .................................................................................................... 50 Voeding [n] .................................................................................................................................... 51 4.4 Ontvangerspecificaties .......................................................................................................... 51 Nabijselectiviteit ............................................................................................................................ 51 Verafselectiviteit ........................................................................................................................... 51 Gevoeligheid, ruisgetal .................................................................................................................. 51 Stabiliteit ....................................................................................................................................... 51 Intermodulatie; kruismodulatie .................................................................................................... 52 Intermodulatie ........................................................................................................................... 52 Kruismodulatie .......................................................................................................................... 52 Reciproke menging (faseruis) ........................................................................................................ 52 Gevoeligheidsvermindering (desensitization) ............................................................................... 52 Blokkering ...................................................................................................................................... 52 4.5 Voorbeeld ontvanger............................................................................................................. 52 5 Zenders .......................................................................................................................................... 55 5.1 Uitvoering .............................................................................................................................. 55 Zender met of zonder frequentietransformatie ........................................................................... 55 Transceiver (TRX) ........................................................................................................................... 55 5.2 Blokschema’s ......................................................................................................................... 55 CW-zender [A1A] [N] ..................................................................................................................... 55 EZB-zender [J3E] [N] ...................................................................................................................... 56 FM-zender met PLL [F3E] [N] ......................................................................................................... 56 5.3 Werking en functie van de volgende schakelingen [n] ......................................................... 57 Mengtrap ................................................................................................................................... 57 Oscilator (kristal en VFO) ........................................................................................................... 57 Scheidingstrap ........................................................................................................................... 57 Stuurtrap ................................................................................................................................... 57 Frequentievermenigvuldiger ..................................................................................................... 57 Vermogensversterker ................................................................................................................ 57 Aanpassing ................................................................................................................................. 57 Pagina 97
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Frequentie (Hz) = 1 gedeeld door pe
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2 Componenten 2.1 Weerstand Weersta
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Faseverschil tussen stroom en spann
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“uitgang”/negatieve kant (KNAP)
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3 Schakelingen 3.1 Combinatie van c
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