Hadria Octavia
Jurusan Teknik Elektro Politeknik Negeri Padang

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Unjuk Kerja Transmisi Video Dengan Teknik Pengkodean Spasial Skalabilitas Purwadi, Agus; Octavia, Hadria; Mahjud, Ichsan
Elektron : Jurnal Ilmiah Vol 6 No 1 (2014): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (153.055 KB) | DOI: 10.30630/eji.6.1.63

Abstract

Video transmission over the internet can be a great possibility of the existence of lost packets (packet loss) and load variations in a large bandwidth. This is a source of network congestion can interfere with the rate of data communication. In this paper the proposed planning optimal error control in scalable video transmission to a video coding technique FGS (Fine Granularity Scalability), which is an improvement on the MPEG-4 video coding, which has outputs are scalable base layer and layer Enhanchement that have different sizes and rates , which the application will be adapted to the transmission network conditions, the ultimate goal is to minimize any distortion from the source to the destination. In the simulation yields a value Peak Signal to Noise Ratio (PSNR) on the base layer of 29, 683 dB and 78,917 dB enhancemenet layer and the base layer for the MSE of 69,998 dB and 0,000834417 dB enhancemenet layer, Means Square Error (MSE) as the performance of the network system performance on video quality for both the base layer and layer Enhanchement
Proses Tracking Satelit Lapan-Tubsat Dengan Menggunakan Frekuensi S-Band Octavia, Hadria; yustini, Yustini; firdaus, Firdaus
Elektron : Jurnal Ilmiah Vol 6 No 1 (2014): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.947 KB) | DOI: 10.30630/eji.6.1.62

Abstract

Satelit LAPAN-TUBSAT yang merupakan satelit mikro pertama yang dibangun LAPAN Indonesia yang bekerja sama dengan Technical University of Berlin (TU-Berlin, Jerman), hingga kini telah dapat menghasilkan gambar video daerah-daerah diwilayah Indonesia sesuai misinya yaitu sebagai satelit surveillance yang mengamati permukaan bumi. Satelit LAPAN-TUBAT ini beredar pada orbit polar, bergerak dan melingkupi seluruh daerah di Indonesia dari timur ke barat seiring dengan rotasi bumi. Untuk memanfaatkan satelit ini secara maksimal maka perlu disiapkan stasiun bumi kendali dan penerima data payload (muatan) satelit terebut. Operasi satelit LAPAN-TUBSAT yang dilakukan melingkupi 2 (dua) hal pokok yaitu operasi pengamatan kondisi kesehatan satelit dan operasi muatan satelit dalam perolehan data video. Sementara fungsi dasar operasi satelit ini melakukan fungsi Telemetri Tracking and Command (TT&C) yaitu melakukan operasi Telemetri, penjejakkan (Tracking) satelit dan operasi pengiriman data komando (Command) ke satelit untuk melaksanakan misi operasinya.
UNJUK KERJA PENERAPAN TEKNOLOGI VoIP PADA JARINGAN VPN (VIRTUAL PRIVATE NETWORK) Octavia, Hadria
Elektron : Jurnal Ilmiah Vol 5 No 2 (2013): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.115 KB) | DOI: 10.30630/eji.5.2.49

Abstract

VoIP ( Voice over Internet Protocol ) is a technology used for communication in the form of IP based voice media over long distances. The concept of a VPN (Virtual Private Network) in this paper makes a client that is on the public network can be connected to a LAN network. To use the VoIP server in the Linux operating system Trixbox, whereas for the VPN server using ClearOS and X-lite is used as a softphone to make calls to the client. Of testing at 64kbps bandwidth using the G711 codec produces value performance (delay, jitter, and packet loss ) is not good, so that voice data delivered is less clear. Thus the choice of bandwidth for the G.711 codec 512kbps up is the best solution to get the value of the performance (delay, jitter, and packet loss) better . And a choice of 3 Greed (low, medium, high) on setting bandwidth, high is the best option. Because it can produce the best performance for VoIP VPN technology.
Design of a Transmission Mution Measurement System in Single Mode Cable Index and Multi Step Index Step Optical Models Due to Bending Data Factors with Fingers Using OPM and OTDR Measurement Equipment Octavia, Hadria; Asril, Aprinal Adila; veronica, Vera; Khairunnisa, Shara
Jurnal Ilmiah Poli Rekayasa Vol 15, No 1 (2019): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.045 KB) | DOI: 10.30630/jipr.15.1.135

Abstract

Warping that occurs in fiber optik cables has the potential to cause serious power losses and further leads to optikal fiber rupture. Therefore, it is necessary to measure the effect of the optikal fiber curvature on the power loss generated when the optikal fiber is curved. This study aims to determine changes in the intensity of light output through plastic optikal fibers. this research distinguish the type of single mode cable and multi mode with varying radius. This paper only discusses the calculation of light output that has been affected by the curve of the optikal fiber. from the analysis conducted with a fiber optik cable length of 100 m, attenuation of 0.001 db / km and a bending radius that varies with a bend radius of 8 cm, 2x4 cm and 4 cm. different optikal fiber warping losses are obtained. that single mode cable is better than multimode cable. Kata Kunci : Serat Optik,bending, Redaman, Jari-Jari, Singel mode, Multi mode