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PENGARUH BAHAN DIELEKTRIK DALAM UNJUK KERJA WAVEGUIDE Markis, Lince
Jurnal Ilmu Fisika Vol 4, No 1 (2012): JURNAL ILMU FISIKA
Publisher : Jurnal Ilmu Fisika

Makalah ini menyajikan hasil studi pengukuran nilai Voltage Standing Wave Ratio (VSWR) dan power reflection factor (PRF) untuk berbagai jenis bahan dielektrik yang akan disisipkan pada saluran transmisi yang beroperasi di frekuensi 9 GH dan dibandingkan dengan saluran transmisi tanpa bahan dielektrik. Pengukuran dilakukan di laboratorium antena Politeknik Negeri Padang dengan menggunakan alat ukur penunjang komponen waveguide yang berfungsi menghasilkan nilai VSWR dan PRF sehingga didapatkan grafik gelombang berdiri dengan parameter tegangan dan jarak. Pengukuran dilakukan dengan menjadikan bahan dielektrik berbagai jenis dengan kondisi rangkaian terbuka. Pengukuran pertama dilakukan untuk bahan dielektrik jenis teflon berwarna putih diperoleh hasil VSWR sebesar 28,50 dengan PRF 86,90% sedangakan bahan dielektrik jenis plexiglass berwarna transparan nilai VSWR sebesar 12,39 PRF 72,35 % dan bahan dielektrik jenis PVC berwarna abu-abu VSWR 7,97 dengan PRF 60,39 %. Sedangkan untuk saluran transmisi tanpa bahan dielektrik ( tidak disisipi bahan dielektrik ) nilai VSWR 1,50 dengan PRF 4,01%.

Analisis dan Pengukuran Tanggapan Frekuensi terhadap Redaman Serat Optik Uzma Septima -; Lince Markis -; Ramiati - -; Andi Ahmad Dahlan; Sri Nita -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

The concept of smart home and cyber home is not the same, even much different. If a smart home or smart home is more aimed at users or home users who lead to conventional homes equipped with digital devices, the concept of cyber home is more to the bandwidth capacity of the internet to complement digital devices in the home. For this reason, Cyber Park Indonesia cooperates with PT Wika Realty. Specifically to develop the housing as a cyber home, Cyber Park Indonesia uses optical fiber. [Kompas, 2017]. This fact states that communication using optical fiber becomes very important so that to optimize the optical fiber system, a study that produces frequency responses to optical fiber attenuation parameters is made. Various sine signal frequency and amplitude values are given as input from an optical fiber dispersing system by looking at the response of the receiver in the form of voltage parameter values. The frequency values given range from 100 Hz to 10 Khz. The linkage of the input amplitude value to the damping value is an output voltage output generated by the amplitude of the amplitude parameter at the sending end. This voltage value comparison is used as the damping parameter of an optical fiber communication system. Giving this frequency will provide the performance of a fiber optic communication system. The resulting voltage value is a constant of changes in the frequency value.

Installasi Base Transceiver Station (BTS) untuk Jaringan Node B pada Operator Hutchison 3 Indonesia (H3I) Uzma Septima -; Lince Markis -
Jurnal Ilmiah Poli Rekayasa Vol 11, No 1 (2015)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Base Transceiver Station is a device used to connect mobile-phone or smartphone in order to make long-distance communication, although in doing the movement or in transit from one place to another. Installation Base Transceiver Station for Network Node B At the operator Hutchison 3 Indonesia is done to make the operator Hutchison 3 Indonesia signal received by the phone for the better and not dashed when the user performs long-distance communication links with conditions in performing the movement or in the course of one place to another. Methods beginning the process of physical installation of Base Transceiver Station for Node B network in the operator Hutchison 3 Indonesia and order all the Base Transceiver Station can live well after the battery is connected to a rectifier and the required accuracy when performing the installation Base Transceiver Station. Furthermore, the integration process or Commissioning of the Base Transceiver Station for Node B network operator Hutchison 3 Indonesia on this in order to actively and After Commissioning obtained Receive Signal Level sectoral antennas of -59 dBm which can emit a signal as far as 7 km to 8 km , after the new process or Pointing connection between this new Base Transceiver Station Base Transceiver Station with preexisting and Pointing between Siak new Base Transceiver Station Base Transceiver Station Perawang with Perawang Students who have a distance of 5 km Receive Signal level of -32.4 dBm made in accordance with a budget link provided operator Hutchison 3 Indonesia is -30 dBm to -40 dBm.

Implementasi Sistem Pengukuran Redaman Serat Optik Pada Lekukan Lince Markis -; Vera Veronica -; Uzma Septima -
Jurnal Ilmiah Poli Rekayasa Vol 14, No 2 (2019): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Dutch electronics company, Philips, is testing LiFi technology. LiFi or Light Fidelity is able to deliver broadband internet connections through light intermediaries. According to Philips Lightning Olivia Qiu's Chief Innovation Officer, LiFi technology has great potential for today's digital era. Indeed, if you look at the current world trend, internet connection has now become one of the daily needs of humans just like the lighting needs produced by Philips massively. When radio frequency becomes increasingly dense, the light spectrum is a large untapped resource [kompas, 2018]. Based on the facts stated that communication using optical fiber becomes very important so that to optimize the fiber optic system an implementation of optical fiber attenuation measurements is made. In this study, the method of implementing the measurement of optical fiber attenuation at a wavelength of 875 nm was introduced. This optical fiber attenuation measurement utilizes transmitter and receiver optical fiber systems that are connected to optical fibers with different lengths and curves. Attenuation for the length of 1, 3, 4, 5 and 6 meter optical fibers is 0.034, 0.558, 0.625, 1.156 and 2.170 dB respectively in straight optical fiber conditions. The power values for each optical fiber with lengths 1, 3,4,5 and 6m respectively are 52.21, 51.58, 50.81, 45.08 and 30.05 dB when there are curves. The attenuation values of each 1, 3, 4, 5 and 6 m optical fiber lengths are - 0.746, - 0.8, - 0.864, - 1,384 and - 3,145 dB respectively when there is a curve.

TEKNIK ESTIMASI DAN KOMPENSASI GERAK PADA VIDEO CODING FGS (Fine Granularity Scalability) Agus Purwadi; Afrizal Yuhanef; Lince Markis
Elektron : Jurnal Ilmiah Vol 5 No 1 (2013): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Motion estimation is a process to determine the movement of an object on video sequential. The movement of objects is known as motion vector. A motion vector indicates a shift point between the current frame with the reference frame. Of motion vector is obtained, it would seem that the movement of the dots between the observed frame. In this study using the algorithm block maching SAD (Sum of Absolute Different), the search process is done per pixel. To determine the quality of the movement of objects in each frame interpolation is obtained by calculating the PSNR value. PSNR values range from 35 to 40 dB. From the research conducted using the 90 frame interpolation obtained PSNR value decreases.

PENGUKURAN EFEK TRANSFORMER PADA WAVEGUIDE Lince Markis
Jurnal Teknik Elektro Vol 2, No 3 (2013): Jurnal Teknik Elektro
Publisher : Situs resmi ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.412 KB)

Makalah ini menyajikan hasil studi pengukuran efek transformer pada waveguide dengan melihat nilai VSWR dan power reflection factor pada berbagai variasi ketinggian dari 3 screw transformer. Transformer ini di pasangkan pada ujung saluran transmisi yang diterminasi beroperasi di frekuensi 9 GH. . Pengukuran dilakukan di laboratorium politeknik negeri padang dengan menggunakan alat ukur penunjang komponen waveguide. Melalui alat ukur ini dihasilkan nilai VSWR dan power reflection factor sehingga didapatkan grafik gelombang berdiri yang dipengaruhi oleh posisi 3 screw dari transformer. Pengukuran dilakukan dengan memberikan variasi ketinggian screw transformer berturut-turut yaitu 0mm, 2mm, 4mm, 6mm, 8mm dan 10mm. Pengukuran pertama dilakukan pada ketinggian screw 0mm diperoleh hasil VSWR sebesar 9,06 dengan power reflection factor 64,19% kemudian 2mm nilai VSWR sebesar 6,18 power reflection factor 52,05 %, 4mm nilai VSWR 1,95 dengan power reflection factor 10,41 %, 6mm nilai VSWR 1,26 dengan power reflection factor 1,30 %, 8mm nilai VSWR 1,15 dengan power reflection factor 0,47 %, 10mm nilai VSWR 1,08 dengan power reflection factor 0,15 %.

PENGARUH BAHAN DIELEKTRIK DALAM UNJUK KERJA WAVEGUIDE Lince Markis
Jurnal Ilmu Fisika (JIF) Vol 4 No 1 (2012): March 2012
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.4.1.1-7.2012

Makalah ini menyajikan hasil studi pengukuran nilai Voltage Standing Wave Ratio (VSWR) dan power reflection factor (PRF) untuk berbagai jenis bahan dielektrik yang akan disisipkan pada saluran transmisi yang beroperasi di frekuensi 9 GH dan dibandingkan dengan saluran transmisi tanpa bahan dielektrik. Pengukuran dilakukan di laboratorium antena Politeknik Negeri Padang dengan menggunakan alat ukur penunjang komponen waveguide yang berfungsi menghasilkan nilai VSWR dan PRF sehingga didapatkan grafik gelombang berdiri dengan parameter tegangan dan jarak. Pengukuran dilakukan dengan menjadikan bahan dielektrik berbagai jenis dengan kondisi rangkaian terbuka. Pengukuran pertama dilakukan untuk bahan dielektrik jenis teflon berwarna putih diperoleh hasil VSWR sebesar 28,50 dengan PRF 86,90% sedangakan bahan dielektrik jenis plexiglass berwarna transparan nilai VSWR sebesar 12,39 PRF 72,35 % dan bahan dielektrik jenis PVC berwarna abu-abu VSWR 7,97 dengan PRF 60,39 %. Sedangkan untuk saluran transmisi tanpa bahan dielektrik ( tidak disisipi bahan dielektrik ) nilai VSWR 1,50 dengan PRF 4,01%.

Renovation of Crane Control System of Reach Stalker Ferari 178h1 Using Avr Atmega2560 Markis, Lince; Wardana, P.Susetyo; Syawaldipa, Ardi
International Journal of Advanced Science Computing and Engineering Vol. 4 No. 2 (2022)
Publisher : SOTVI

Container rental service companies or container parking facilities providers need container transportation equipment such as Crane Reach Stalker to move and arrange containers. Several container services companies in Surabaya such as Citra Mandiri Sejati have a Crane Reach Stalker made by Ferari Italy which experienced damage to the electrical control. After observing the control unit, the damage was in the hardware comparison system and the relay control used. Dealing with these problems, planning and improvement of the total control system were carried out using the ATMega2560 AVR microcontroller. However, the problem becomes complex and requires cooperation with Hydraulic control partners when the entire system must be resolved. From the renovation work on the Ferari 178H1 Load Handling Crane system for a year, it was obtained that the Load Handling control input data in which it was a joystick and a 3 positions button with an output level of 0 and 9 volts. Hydraulic control uses a Solenoid Valve type 4/3 with 2 input control coils, and in overall system testing, the average length of time for the movement of the Piston Crane is 6 to 12 seconds. From the test results using a 40 tons container load, it was stated by the Crane driver that the time used to carry out Load Handling for the Hydraulic type and the Crane's age was suitable and appropriate. Â

Analysis on The Effect of Channel Bandwidth Occupying in LTE Frequency Band on Throughput Yusnita, Sri; -, Yustini; Markis, Lince; Tristianti, Widia; Wijaya, Taruma Leo
International Journal of Advanced Science Computing and Engineering Vol. 5 No. 1 (2023)
Publisher : SOTVI

The maximum channel capacity of a 4G LTE network will be directly correlated to the channel bandwidth that occupies a certain radio frequency on that network. The number of Resource Blocks (RB), subcarriers, and Resource Elements (RE) as channel resources available to serve users concurrently will depend on the bandwidth channel sizes. Mobile service providers in Indonesia provide scalable channel bandwidth LTE 4G networks on a variety of frequency bands, including adjacent and non-adjacent bands. In this study, it was examined how to channel bandwidth, which changes at 10MHz, 15MHz, and 20MHz, affects throughput to give user equipment the best possible performance (UE). This study makes use of actual measurement data from installed and active eNodeB or cells obtained via the drive test approach. According to the test, each channel's maximum throughput varies, however, there is no linear relationship found between channel bandwidth expansion and throughput. The 20MHz channel bandwidth, which is located in the 2300MHz frequency band, has a maximum throughput value of 64666.80 kbps.

Home Switch Control using Electromyograph and AVR Microcontroller Markis, Lince; Wardana, P. Susetyo; Novi
International Journal of Advanced Science Computing and Engineering Vol. 5 No. 2 (2023)
Publisher : SOTVI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/ijasce.5.2.169

The increasingly rapid development of technology in the field of biomedical engineering, one of which is applying EMG (Electromyograph) signals to move mechanical devices. Various studies have been carried out with various methods tested. The research entitled "Home Switch Control using Electromyograph and AVR Microcontroller" is directed at EMG signals in the arm muscles as input to actuate several switch devices which are usually used in homes or hospitals. The results of placing electrodes at 3 points, namely Bicep Brachii, Tricep Brachii, and Wrist Flexor, produce an EMG signal which has 2 different truth values during contraction after extraction using a moving average and thresholding algorithm, so that the final result produces an on-off control system for 1 switch.

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