Elektron Jurnal Ilmiah (EJI - Department of Electrical Engineering, Politeknik Negeri Padang)
Not a member yet
158 research outputs found
Sort by
Peningkatan Kualitas Sinyal 4G Berdasarkan Nilai KPI Dengan Metode Drivetest Cluster Padang
Full text linkThe real signal quality measurement on the 4G network is a reference to improve signal quality. Measurements were made for two different operators on the Padang cluster. The measurement parameters taken are the RSRP value, SINR and throughput as the basic parameters of the KPI (Key Performance Indicator) standard. Measurement of these basic parameters is done by the drive test method using the Tems Pocket device while for data analysis using Tems discovery and Mapinfo Pro. Planning the data collection path is an important part to find out the bad spot areas of the two operators for planning signal quality improvement. The measurement results in the process of collecting data for bad categories and not being detected at all are used to determine the position of the new site by taking into account the three signal parameters, the number of users in the area, the minimum limit of the bad signal radius and the site positions that already exist for both operators. Using the cross method, three new site coordinate points are obtained, namely first at longitude 100.403428 ° and latitude -0.870309 °, second point at longitude 100.376331 ° and latitude -0.858726 °, and third point at longitude 100.404072 ° and latitude -0.966503 ° and 47 bad spot area
Perancangan Dan Realisasi Antena Mikrostrip Monopole Segiempat Pada Frekuensi 546 Mhz Untuk Aplikasi Dvb-T
Full text linkAntena mikrostrip adalah suatu konduktor metal yang menempel diatas groundplane yang diantarannya terdapat bahan dielektrik. Antena mikrostrip terdiri atas 3 bagian utama yaitu patch, substrate dan groundplane. Antena mikrostrip yang dapat digunakan dalam konsep aplikasi DVB-T. Sistem DVB-T (Digital Video Broadcasting Terestrial), merupakan sistem penyiaran langsung dari pemancar bumi (terrestrial). Pada penelitian ini dibuat antena mikrostrip monopole untuk DVB-T dengan menggunakan PCB double layer dan software Zeland. Antena ini dirancang pada frekuensi 546 MHz. Bahan yang digunakan adalah PCB epoxy (FR4) double layer dengan ketebalan bahan 1.6 mm dan konstanta dielektrik sebesar 4.7 mm. Antena mikrostrip tersebut diuji untuk mendapatkan nilai frekuensi resonansi, bandwidth, VSWR, HPBW, Gain dan polaradiasi yang kemudian hasilnya dibandingkan dengan hasil simulasi menggunakan software Zeland Program Manager (IE3D). Pada hasil pengukuran antena diperoleh hasil untuk antena mikrostrip diantaranya nilai return loss = -25 dB pada frekuensi = 545 MHz, bandwidth = 140 MHz, dengan nilai VSWR = 1.48 dB, HPBW = 75o dan polaradiasi berbentuk Bidirectional
Design Dan Implementasi Wireless Sensor Network Pada Prototype Pendeteksian Material Galodo
Full text linkFlash flood (debris flow) or people of Padang called “galodo” is one disaster that could threaten any time, especially at plateau with high rainfall. This study is an attempt to design prototype which is implemented to detect the content of the existing material in river flows due to “Galodo”. This research design and implement the wireless sensor network to transmit information or sensor output data and data receivers on prototype of “Galodo” material detection with laboratory testing scale. This system consist of a transmitter device that includes a sound sensor, Arduino Uno, and XBee S2, and a receiver that includes the XBee S2 and raspberry Pi as a database server. Data in data server are expected can distinguish the water in” Galodo” bring small material such as sand or larger or just contain of water. The information obtained display in graphic on the website to system data monitoring including time delay for sending data from transmitter to receiver
Merancang Sistem Pengukuran Redaman Transmisi Kabel Optik Single Mode Jenis Pigtail
Full text linkOptical fiber is a transmission channel made of glass or plastic that is used to transmit light signals from one place to another. Optical fibers, in general, have a basic structure consisting of a fiber core, a fiber coating (cladding), and a protective layer (coating) consisting of an inner jacket. This research discusses the design of the attenuation of the fiber optic transmission measurement system by connection factor. Optical fiber cable used in this research is pigtail type cable with single-mode cable type. The cable used is 10 meters long, which will be installed in the Optical Termination Box. In the Optical Termination Box there are 6 pigtail cables, which are without connections, with a 6 cm sleeve protection one connection and two connections, also with a 4 cm sleeve protection one connection and two connections, then use a barrel adapter. In this design testing tools use Light source, Optical Power Meter, and Optical Time Domain Reflectometer). The attenuation value after testing on the protection sleeve 6cm; 12,330 dB, then the attenuation on the protection sleeve is 4cm; 12,729 dB. Then attenuation on the barrel adapter; 12,954 d
Peningkatan Performansi Jaringan 4G LTE Berdasarkan Pengecekan Sinyal Di Kecamatan Bukit Sundi Kabupaten Solok
Full text linkTeknologi LTE merupakan teknologi generasi keempat yang diciptakan untuk memperbaiki teknologi generasi sebelumnya dalam hal layanan kecepatan transfer data. Kualitas layanan data akan semakin menurun seiring meningkatnya jumlah pengguna yang mengakses. Salah satu cara untuk menjaga kualitas layanan operator adalah menambah jumlah site. Kecamatan Bukit Sundi merupakan salah satu kecamatan di Kabupaten Solok, Sumatera Barat yang memiliki jumlah menara telekomunikasi yaitu dua menara. Kondisi ini menyebabkan tidak semua area mendapatkan layanan telekomunikasi. Untuk mengetahui kondisi kekuatan sinyal di lapangan dapat dilakukan dengan drive test. Berdasarkan hasil drive test Kecamatan Bukit Sundi didominasi oleh RSRP kategori poor (RSRP -110 dBm sampai -100 dBm). Penambahan eNodeB baru dilakukan berdasarkan bad spot area. Setelah peninjauan lokasi eNodeB baru, didapatkan titik longitude dan latitudenya. Untuk mendapatkan azimuth dilakukan simulasi sektor. Setelah diamati pada software atoll, setelah penambahan eNodeB baru terjadi peningkatan RSRP bagus (-95 dBm sampai 0) dari 14,5% menjadi 26,79%
Rancang Bangun Sistem Detector Tiket Kereta Api Menggunakan RFID Berbasis Mikrokontroller
Full text linkThe design of a prototype train ticket detector system using RFID-based microcontrollers has been made for replacing manual methods that still require officers to check tickets. This tool becomes a useful thing for a passenger to make easier going into the train departure room. The system made consists of 2 RFID units, 2 servo motors as an entrance and exit bar, an LCD circuit, and also facilitated with a buzzer circuit. This tool works when the RFID card is pasted to the RFID reader and the Arduino Uno Microcontroller will process the data whether the RFID card contains a balance and is sufficient to purchase train tickets. Then if the balance is sufficient, then the entrance gate bar is initially closed, it will open and the prospective passenger will enter the waiting room. However, If the balance is insufficient, the portal remains closed and the buzzer will be active and the balance will be displayed on the LCD. Furthermore, by pasting the RFID card on the exit portal crossbar to the RFID reader so the portal on the exit will open
Rancang Bangun Antena Mikrostrip Bowtie Pada Frekuensi 5,2 Ghz
Full text linkMicrostrip antennas are very concerned shapes and sizes. Can be viewed in terms of simple materials, shapes, sizes and dimensions smaller antennae, the price of production is cheaper and able to provide a reasonably good performance, in addition to having many advantages, the microstrip antenna also has its drawbacks one of which is a narrow bandwidth. In this research will be designed a microstrip antenna bowtie which works at a frequency of 5.2 GHz which has a size of 68mm x 33mm groundplane. For the length and width of 33mm x 13mm patch. This antenna is designed on a printed cicuit board (PCB) FR4 epoxy with a dielectric constant of 4.7 and has a thickness of 1,6mm. This bowtie microstrip antenna design using IE3D software. This antenna has been simulated using IE3D software showed its resonance frequency is 5.270 GHz with a return loss -23 595 dB bandwidth of 230 MHz, VSWR 1,142, unidirectional radiation pattern and impedance 43,919Ω. The results of which have been successfully fabricated antenna with a resonant frequency of 5.21 GHz with a return loss -16.813 dB bandwidth of 79 MHz, VSWR 1.368, unidirectional radiation pattern, impedance 43,546Ω and HPBW 105 °
Perancangan Sistem Informasi Untuk Perawatan Dan Perbaikan Modul Pratikum Berbasis Web
Full text linkMicroprocessor and microcontroller laboratories are type III laboratories that are in the electronics engineering study program majoring in electrical engineering, this laboratory serves the activities of student practices for microprocessor system courses, microcontroller systems and interfaces I and II and very large scale intergration (VLSI) programmable logic devices and programmable electronics. Laboran as manager and person in charge of the laboratory, every month submits reports on equipment support facilities and practice modules made manually to the head of the laboratory. Every day the laboratory staff must examine all equipment activities one by one such as computers and practice modules to find out the latest conditions. Seeing the problems above, we need a system solution that can provide fast, accurate, complete and integrated information as a whole. The purpose of this study is to produce an information system design for maintenance and repairs to microprocessor and microcontroller laboratories. The method used in this study analyzes the current system to create a conceptual model so as to produce a database diagram. Next, the design of the display includes the design of the application interface such as the reporter display, laboratory performance reports etc. To further maximize laboratory use and quality teaching and learning is expected that students, lecturers and staff will also participate by reporting damage to supporting facilities at the microprocessor and microcontroller laboratory
PENGENDALIAN KECEPATAN MOTOR DC DENGAN METODA FUZZY LOGIC BERBASIS MIKROKONTROLLER
Full text linkThe Technology and information development involve production process in industries using microcontroller as a brain in control process. The number of control process with microcontroller using Fuzzy Logic method to get the function as is needed. Motors DC are used in some equipment as a driver, not only in small scale but also in huge scale. It used in low or high speed too. The way of controlled chosen depend on the function of DC motor movement. The another method is Pulse Width Modulation (PWM). This is an effective method to controlled DC motor. This method produces square pulses which have specific comparison between high pulse and low pulse. It is usual scale from 0% to 100%. In this research, both Fuzzy Logic method and Pulse Width Modulation (PWM) method base of microcontroller ATMega 8535, both are integrated to control lthe DC motor speed
PENGIMPLEMENTASIAN TEKNOLOGI PROGRAMMABLE LOGIC DEVICE (PLD) SEBAGAI BINER CODE DECIMAL (BCD) UNTUK SCANNING KEYPAD
Full text linkIndustrial of electronics developed in many fields in the middle of 1990s. Base on this situation, the manufacturer produce the product by increased the function, display, low cost, low power consumption and small size. This kind of product must be supported by complex system, small number of integrated circuit and tiny printed circuit board (PCB). Many integrated technologies such as submicron semiconductor, PCB technology, and the using of PCB surface maximal. The market situation push the producer used modern technology in design and testing for example Programmable Logic Device (PLD). It is the integrated circuit using digital logic which can be changed this function by programming and can be used to industrial application. Programmable Logic Device (PLD) technology can be used to many logical programming by using only one IC. The application of this technology can be found in IC 22V10 with 24 pins. This IC can be applied to replace the function of IC 74299 as encoder decimal to biner to scanning keypad