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All Journal Jurnal Fisika Unand Jurnal Kajian Ilmiah Akuntansi Fakultas Ekonomi UNTAN (KIAFE)
Hendra Suhendri
Jurusan Fisika FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Pauh Padang 25163
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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RANCANG BANGUN SISTEM TELEMETRI NIRKABEL UNTUK PERINGATAN DINI BANJIR DENGAN MODULASI DIGITAL FSK-MODULASI FREKUENSI Saputra, Suhendri; -, Wildian
Jurnal Fisika Unand Vol 4 No 1: Januari 2015
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.4.1.%p.2015

Abstract

ABSTRAKTelah dilakukan rancang bangun sistem telemetri nirkabel untuk peringatan dini banjir dengan modulasi digital FSK-modulasi frekuensi. Sistem terdiri dua unit perangkat keras yaitu unit pamancar dan unit penerima. Unit pemancar terdiri dari sensor, rangkaian ADC, rangkaian PSC, rangkaian modulator digital FSK dan modul pemancar FM. Sensor yang digunakan adalah sensor ketinggian berupa potensiometer tipe rotary dengan nilai koefisien determinasinyaadalah 0,9996. Unit penerima terdiri dari modul penerima FM, rangkaian demodulator FSK, dan sistem minimum. Keluaran dari sistem ini adalah status ketinggian permukaan sungai yang ditampilkan pada LCD dan bunyi alarm jika ketinggian air pada status waspada. Hasil pengujian dan pengukuran perangkat menunjukkan bahwa unit penerima dapat menampilkan ketinggian permukaan air pada LCD dan mengaktifkan alarm jika ketinggian air pada status waspada pada kecepatan transfer data sebesar 1190,5 bps. Data dapat diterima oleh unit penerima dalam jangkauan hingga 10 meter pada frekuensi kerja 99 MHz. Pengujian dilakukan pada skala laboratorium.Kata kunci : sistem telemetri nirkabel, modulasi digital FSK, modulasi frekuensi.AbstractA design of wireless telemetry system for flood early warning with FSK digital modulation- frequency modulation has been conducted. System consists of  transmitter and receiver unit. Transmitter unit consists of sensor, ADC circuit, PSC circuit, digital FSK modulator circuit and FM transmitter module. The sensor used is rotary type potentiometer with determination coeficient value is 0.9996. The receiver unit consists of a FM receiver module, FSK demodulator circuit, and the minimum system. The output are water level that are displayed on  LCD and alarm sound if the water level in emergencies level.Results of test and measurement device indicates that the receiver is able to show the height of the water level on the LCD and activate an alarm if the water level in emergencies at  data rate transfer 1190,5 bps. Data can be received by the receiver in the range up to 10 meters at the working frequency of 99 MHz. Testing was conducted at the laboratory scale.Keywords : wireless telemetry systems, digital FSK modulation, frequency modulation
ANALISIS SISTEM PENGENDALIAN INTERNAL PENGELOLAAN BARANG MILIK NEGARA BADAN NARKOTIKA NASIONAL KOTA PONTIANAK B51107104, SUHENDRI
Jurnal KIAFE Vol. 3 No. 4 (2014): Jurnal Mahasiswa Akuntansi
Publisher : Undergraduate Program in Accounting, Department of Accounting, Faculty of Economics and Business, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/kiafe.v3i4.7897

Abstract

The research aims to find out how the system of internal control over State owned Property of National Narcotics Boards distric Pontianak city, and to find out any factors that caused the system of internal control State owned Property of National Narcotics Boards distric Pontianak city being not effective. The method used is descriptive cualitative by taking the object of research at National Narcotics Boards distric Pontianak city. Data used is Property User Authority report 2012-2013 and others data needed. Data collection techniques are documentary studies, interviews, observation, questionnaires, with data analysis techniques that evaluate organizational structure, flowcharts, internal control questionnaires, and compliance test. Based on the analysis, be concluded that the system of internal control over State owned Property of National Narcotics Boards distric Pontianak city is effective. Analysis was committed to organizational structure of National Narcotics Boards distric Pontianak city, flowchart of State owned property administration system, internal control questionnaire was given employees who involved to State owned property administration system, and compliance test to procurement of goods. However, there are several factors that may cause the system of internal control to being not effective is there is no regional internal control institution yet, limited employees, double job, unpermanent employees statue, no used statue of state owned property and land satue is leased, so it cannot recorded as asset of National Narcotics Boards distric Pontianak city. Keyword : Internal Control System, State Owned Property
Co-Authors A.A. Ketut Agung Cahyawan W Mukhlishin, Ahmad Muklishin, Ahmad Wildian Wildian