Optical 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 dB

High number of vehicle theft and damaged vehicle caused climate factor such disasters on conventional garage has made an encouragement to the owners to decrease those risks. By using special access and by putting the garage down tothe basement can be trusted way to minimalized those risks above.This system works by communicate RFID reader and infrared sensor an inputs. RFID reader MFRC522 has a role as authentication tool for vehicle owners by manifest their card identities to the system. Meanwhile the infrared sensors IR-FC51 work as the input of automatic system. All these inputs will be proceeded by Arduino Uno as smart system data processor and ended by the movement of the dc motor as the lift motor and LCD as the information displayer.The registered owner card will get a special access to entering parking lot on basement, while the users that didn’t have registered card has no access to enter. Inside the lift, there will be infrared sensors to detect the vehicle on the lift and automatically will moved the lift upside or downside.

This research aims to design practicum modules for optical cable transmission systems with fiber optic cable (fiber optic) connection systems. This research was conducted by design and experimental methods. The practicum module that is designed consists of the transmitter and receiver parts using a Digital modulation system. The results of this module design will be tested, measured, and analyzed in the delivery of information using FSK digital modulation and the damping effect of informatio received due to the connection of optical fibers to the transmission system. Splicing is done using the fusion splicer (splising) method and adapters. The two connection methods will be compared to the measurement results, especially the damping value. The results of the study are an Optical practicum module using optical signal transmission media as well as a practicum module (jobsheet). The module that is designed will be one of the Practicum modules to support the eyes of the optical fiber communication system in the State Polytechnic Telecommunications Engineering Study Program.   Keyword: Optical cable, fusion splicer, adapter

Employeeshabits that working in offices are spend more than two-thirds of their working hours sitting in front of their desks and give little attention to good body position at work. This condition can cause health problems for themselves such as increasing the risk of hemorrhoids, heart disease, diabetes, obesity, and damage to joints, muscle, and posture. Sometimes the worker does not realize and never count how long they have been sitting. So, one of the efforts to avoid the risk of health problems caused by sitting too long is to make an instrument to warn the effect of long-term sitting with the temperature parameters. This system works based on the temperature detected on the designed seat bearing. The sensor used is SHT11 sensor, LED in bar graph design and buzzer as warning indicators if workers have been sitting too long. LED consists of three colors, which is green which means safe, yellow indicating a near to dangerous state, and red color meaning dangerous and workers are advised to stand for a while until the LED shows the green color. The results of testing show people who have a weight of approximately 70 KG takes 172 minutes to pass the temperature of 37 o C, and people who have a weight of approximately 110 KG takes 155 minutes to pass temperature 37 o C. Woman's body temperature faster increased by 0.31 o C compared to males based on sitting time. Bargraph as an indicator showing green color when body temperature less than 36 o C, yellow bar graph active when body temperature is between 36 o C to 37 o C, and red bar graph is active when temperature the body is more than 37 o C. The buzzer active if the body temperature has dangerous level when the temperature is above 37 o C.

Pada tugas akhir ini dirancang suatu jaringan Fiber To The Home ( FTTH) di Kelurahan Surau Gadang yang mana daerah tersebut dilakukan perancangan dan pengukuran performasi jaringan dimana standar yang digunakan sesuai dengan PT. ICON+. Tata cara yang digunakan dalam perancangan ini ialah penen- tuan posisi, pengumpulan informasi, serta perancangan memakai aplikasi Google Earth serta OptiSystem. Hasil dari perbandingan antara pengukuran OptiSystem dan pengukuran di lapangan didapatkan hasil redaman yang berbeda, dimana hasil pengukuran pada OptiSystem pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.277 dBm sedangkan untuk pengukuran di lapangan pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.52 dBm. Parameter Rise Time Budget didapatkan dari perhitungan ialah 0. 029 ns yang sudah memenuhi stndar kelayakan ialah tidak lebih dari 0. 219 ns sedangkan nilai Bit Error Rate pada simulasi ialah 8.11464 x 10-33 yang sudah memenuhi standar kelayakan ialah tidak lebih dari 10-9. Nilai Signal To Noise Ratio (SNR) merupakan 50.044831 dB yang pula penuhi standar minimal SNR ialah 21.5 dB. Dari hasil perhi- tungan serta hasil simulasi didapatkan nilai-nilai yang masih memenuhi standar kelayakan jaringan Fiber To The Home sehingga rancangan layak buat diimplementasikan.