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Analysis Of Attentuation In The System Of Communication Of Optical Fiber Mooniarsih, Neilcy T; Srihendayana, Hidayat; Sufandi, M. Ridhwan
ELKHA : Jurnal Teknik Elektro Vol 4, No 1 (2012): Edisi Bulan Maret
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.438 KB) | DOI: 10.26418/elkha.v4i1.352


Abstract The research is on the use of optical fiber as a medium of transmission in form of optical wave (light), namely, G. 652 SMF and G.655 SMF NZDS, in Link Main Route and Link Diversity Route. Optical fiber also experiences losses. One of them is attentuation or the decrease of the light due to the distance and characteristic of the fiber. The value of the attentuation is measured by using Optical Power Meter and OTDR YOKOGAWA AQ7275. The result of the measurement is compared with the standard stipulated by International Telecommunication Union (ITU). Through the comparison, it is known that most of the values of the attentuation of the optical fiber is under the standards of ITU. It means optical fiber used is in good condition, except in Link Diversity Route in Core 22 and Core 23 due to bending in the distance 13 kms and 17 kms from the Link Main Route. And, to know the performance of system of the optical fiber communication, the method of Link Power Budget is employed. Keywords Optical Fiber, Attentuation of Optical Fiber, Link Power Budget
Web-Based Presence Application Development at Pontianak State Polytechnic Cahyono, Hendro; Hasan, Hasan; Siswanto, Lindung; Sufandi, M. Ridhwan
ELKHA : Jurnal Teknik Elektro Vol. 13 No. 1 April 2021
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v13i1.44831


The employees' presence is an important factor for an institution, which is relate to discipline and has an impact on the employee's performance.  Therefore, it is necessary to have specific data collection to record presence, absenteeism, and work activities that has done every day so that employee performance record in real-time and proper. There are many ways that can be done to achieve a good presence information system, one of them is using computer and mobile phone technology which is implemented with a website-based presence application. At the Pontianak State Polytechnic, finger print machine used in the presence process system, but it is still lack in efficiency and effectiveness in data collection, data retrieval as well as data recap calculations, which require a relatively long time. Besides, the bigger risk of error and loss of presence data.  Based on problems, a Web-Based Presence Application Development Information System created at the Pontianak State Polytechnic. The research method used in data collection, which includes research methods, interviews and literature. While software development uses a waterfall model which includes requirements analysis, design, coding, testing and implementation. This web-based presence application can provide convenience in the employee presence process, data search and presence recap calculations, and minimize loss and errors in recording employee presence data. Based on web-based presence application testing and evaluation to thirty-four employees of Pontianak State Polytechnic, it stated that the web-based presence application is suitable for used by all employees of Pontianak State Polytechnic.