What is Signal
a signal is a physical quantity or impulse that transmits information. This could be anything from electrical impulses in electronic devices to light waves in optical communications.
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FTTH Fiber to the Home
FTTx is a access network technology that uses optical fiber directly from the central point to the Home. FTTx offers triple play services voice, video and data. -
Modulation and Demodulation
Modulation and demodulation are fundamental processes in telecommunications that involve the encoding and decoding of information onto a carrier signal. -
SONET Synchronous Optical Network
SONET Synchronous Optical Network Multiplex electrical signals (Digital) from different sources and creates optical carrier (OC). USA, CANADA and JAPAN developed T1 Standard. ANSI develop SONET. The rest of the world uses a primary rate of E1. ITU-T develop SDH. Topics What is SONET? What is Synchronous Digital Hierarchy? What is SDH? What… -
DWDM Dense Wavelength Division Multiplexing
Prerequisite Multiplexing Optical Fiber PCM PDH SDH Transmission Fundamental WDM Wavelength division Multiplexing (WDM) technique increase the capacity of signal carrying medium. WDM technique assign different frequency / wavelength value to every incoming signal. These signals are multiplexed on a single sharing medium. SONET/SDH use TDM technique and transmit data in the form of a… -
Solar Panel Installation
Solar Panel Installation Basic Components of Solar System Solar Panel Solar Charge controller Inverter Battery Bank Load Calculation 03 energy saver (24 watt) 24*3 = 72 watt + 08 = 80 watt 02 Fan (100 watt) 100*2 = 200 + 20 = 220 watt Load = 220+80 = 300 watt If u want to use… -
Computer Ports
Computer Ports Computer ports or Motherboard I/O interfaces are used to connect external devices to the computer. These interfaces are mostly located on the back side of the motherboard. Number of Interfaces depends on the size of Motherboard and technology used. PS2 Din Connector PS2 6 pin din connector Green for mouse Purple for keyboard… -
SDH Synchronous Digital Hierarchy
SDH It is a transmission method. This method is used in optical fibre transmission system called SDH system. We have already discussed the basic concepts of the transmission system. This video will give you the basic concept of SDH. SDH = Synchronous Digital Hierarchy.EU and Japan standard.A standard for telecommunication transport defined by ITU-T. Prerequisite. Following…
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Transmission medium
Transmission Media It is a path through which information signal travels from source to destination. It is also known as Transmission Line or Transmission channel. It is further divided into two categories Guided Media. Unguided Media. Guided / Bounded /Wired…
Noise
Noise Noise or Electrical Noise is any unwanted electrical signal interferes or distorts the information signal. It affects the signal inside or outside the equipment and generates error. It affects both analog and digital signal and quality of information signal…
Modulation and Demodulation
Modulation and demodulation are fundamental processes in telecommunications that involve the encoding and decoding of information onto a carrier signal.
Need of Modulation
Need of modulation is essential in communication systems for several reasons: Long Distance Communication, Efficient Use of Frequency, Antenna Size and etc.
Subscriber Identity Module SIM
SMART card / SIM Card SMART Card It is an electronic circuit which is used to provide information about its holder. Subscriber Identity Module. In case of Mobile SIM card it enables a mobile device to communicate over telecom network.…
WiFi direct
WiFi Direct WiFi Direct™ enables devices to establish a direct WiFi connection over which they can send and receive files. WiFi Alliance developed the WiFi Direct standard. It is ad hoc networking and enable devices to connect to each other…
Bluetooth and Ad hoc Network
Ad hoc Network. Ad Hoc network is a decentralized wireless network used for communication for a limited time period. Piconet. A piconet is a Ad hoc using Bluetooth technology. One device act as a Master and others…
Introduction to Programming
Introduction to Programming Computer Program A program is a set of instructions following the rules of the chosen language. Without programs, computer is useless.It contains a list of instructions that tell the computer what to do and how to do.…
Virus
Computer Virus A virus is a malware/harmful software which infect a computer function. Malware = malicious + Software .A computer virus reside on a host computer. A virus attaches itself to a file. A file containing a virus is called infected file.…
Cloud Computing
Cloud Computing Cloud computing is a computing infrastructure where a large pool of system are connected to internet for application, data and storage services. Pay as per use model Prerequisite: Operating system, online storage Public Cloud Public clouds are owned…