Uitwerking exameneisen examen Zendamateur N/F

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