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Design and development of a virtual frequency meter/Zamry Rosli

Design and development of a virtual frequency meter_Zamry Rosli_E3_2006_NI
Sejak kebelakangan ini, proses pengukuran meter “maya” amat popular dikalangan pembangun radio amatur. Dalam kes ini, “maya” bermaksud terdapat bahagian yang berfungsi atau dengan ertikata lain meter pengukuran utama ini dilaksanakan dengan bantuan komputer. Pengukur frekuensi maya boleh dikategorikan kepada dua bahagian. Bahagian pertama instrumentasi ini adalah “maya sepenuhnya” dimana ia mengandungi suatu aturcara untuk computer dan fungsi pada input-output ukuran isyarat dilaksanakan pada perkakasan lain. Bahagian kedua pula, terdapat bahagian yang “maya” dan sebahagian lagi dalam bentuk perkakasan. Dengan nilai 4MHz bagi nilai isyarat maksimum, dan masa asas 0.1 saat, 1.0 saat, 10 saat dan 100 saat, perkakasan ini boleh mengukur frekuensi gelombang digital sehingga ke nilai maksimum 4Mhz iaitu bergantung pada nilai kristal yang digunakan. Suatu litar pembanding diperlukan bagi pengukuran isyarat analog Perkakasan ini perlu disambungkan pada sebuah komputer. Fungsi utama peranti ini adalah untuk melaksanakan tugas sebagai meter pemgukur. Peranti ini memiliki pelbagai kegunaan, dari bidang industri - dengan menghasilkan papan antaramuka dan dibina di dalam komputer dan juga untuk peranti yang mudah. Kedua-duanya dengan menggunakan komunikasi sesiri. ______________________________________________________________________________________ Recently in the radio amateur's practice became popular the so-called virtual measuring meters. In this case by "virtuality" is implied the fact that a certain part of the functions or its main measuring meter realizes with the aid of the personal computer. Virtual measuring meters can be conditionally broken into two categories. The instruments of the first group "are completely virtual" and actually they consist of one program for computer, and functions on the input-output of the measured or generatable signal are placed on the regular hardware. The instruments of the second group have besides "virtual" part even and material. With a 4MHz maximum frequency, a selectable time base of 0.1 seconds, 1.0 second, 10 seconds and 100 seconds, the hardware can measure frequency of digital signal up to the 4MHz crystal limit. A comparator is needed to measure analog signal. To the computer in this case the certain device, which is the main part of the virtual instrument, is connected. Such devices realize some functions or knots of measuring meter. These devices can have different complexity - from "heaped" industrially produced interface boards, built in into the computer, to the simple devices, connected to the computer through computer serial port.
Contributor(s):
Zamry Rosli - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
radio amateur's ; Virtual measuring ; "heaped"
First presented to the public:
5/1/2006
Original Publication Date:
4/30/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 88
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-04-30 16:36:57.321
Submitter:
Nor Hayati Ismail

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