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Sodoben frekvenčni števec za območje radijskih frekvenc
ID TURŠIČ, ANA MARIJA (Author), ID Vidmar, Matjaž (Mentor) More about this mentor... This link opens in a new window

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PID: 20.500.12556/rul/c6047fab-a4fb-41fe-909f-b98ced9631e1

Abstract
Povzetek V pričujočem delu smo iskali rešitev za merilni inštrument, ki je utonil v pozabo. Marsikje so ga nadomestili so ga ceneni spektralni analizatorji, ki imajo funkciji štetja frekvence ter merjenja jakosti signala že vgrajeni. Vendar nam je pri delu pogosto odveč velika in težka škatla, kot je spektralni analizator, in potrebujemo le priročen merilnik frekvence. Poleg tega je zastarela zasnova visokofrekvenčnih števcev s počasnim preddelilnikom, neprimerno vhodno občutljivostjo, neprimerno vhodno impedanco in neprimernimi sondami naredila merilnik nepraktičen. To magistrsko delo opisuje sodoben merilnik frekvence in jakosti signala. Njegove glavne odlike so visoka vhodna občutljivost, širok frekvenčni razpon ter visoka hitrost merjenja tako frekvence kakor tudi jakosti signala.

Language:Slovenian
Keywords:števec frekvence, delovanje števcev frekvence, merilnik jakosti signala, mikrokrmilnik LPC2138/01
Work type:Master's thesis/paper
Organization:FE - Faculty of Electrical Engineering
Year:2014
PID:20.500.12556/RUL-29543 This link opens in a new window
Publication date in RUL:23.09.2014
Views:4919
Downloads:1443
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Secondary language

Language:English
Title:State-of-art frequency counter for the radio-frequency range
Abstract:
Abstract In this thesis we tried to develop a measurement equipment which has gone to oblivion. In many places it was substituted by cheap spectrum analysers which have integrated both frequency counter and amplitude meter. Being big and heavy box, spectrum analyser is not always practical as we often only need lightweight and efficient instrument for measuring frequency. Besides, old-fashioned design of high-frequency counters with slow prescaler, unsuitable input sensitivity, unsuitable input impedance and unsuitable probes results in impractical instrument. This thesis describes the state-of-the-art frequency counter and amplitude meter. It's main characteristics are high input sensitivity, broad frequency range and high speed measurement of frequency as well as amplitude.

Keywords:frequency counter, operation of frequency counters, amplitude meter, microcontroller LPC2138/01

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