Knowlarity Communications India Pvt. Ltd. interview questions and answers - Wikitechy

What is Electronic Engineering how to become a good Electronic Engineer ?

Editor — Thu, 05 Aug 2021 05:42:14 +0000

Electronic engineering :

Electronics engineering is a designing order which uses non-direct and dynamic electrical segments, (for example, semiconductor gadgets, particularly transistors, diodes and incorporated circuits) to plan electronic circuits, gadgets, Microprocessors/Microcontrollers and frameworks including VHDL Modeling for Programmable rationale gadgets and FPGAs.
The control regularly additionally outlines inactive electrical parts, typically in view of printed circuit sheets.

How to Become a good Electronic Engineer

The first and most thing you should do as a starting step to be a professional engineer, is to get a degree in electronics and communication.
If you want to be a professional engineer in Embedded System design or VLSI design (two most prominent field of electronics), there are institutes like CDAC, Vector India, VEDAIIT, Maven Silicon and many more which offer short term or long term courses in these fields. Not only that you also get the advantage of being placed in any leading electronics company.
If you want to be a professional engineer in PCB designing, you need to have good working knowledge on design tools like CAD, ORCAD, and Eagle etc. You even need to have basic knowledge about PCB designing and mounting.
If you want to be a professional engineer in VLSI or chip designing, you must have working knowledge in tools like Xilinx, Magic etc and of course must have good VLSI programming skills.
It is not only the knowledge of software tools that can make you a professional engineer, but also good technical skills.
These skills can be having practical knowledge in circuit mounting, soldering or PCB designing , practical knowledge in installation of networking products like routers, switches etc, practical knowledge of working with home automation devices like PLCs or practical knowledge of operating electronic equipments like Oscilloscopes, Wave Generators, Pulse Generators etc.
As a fresher, you can apply for the position of trainee or intern at any reputed company. If you are GATE or NET qualified, you can always apply for the position of research fellowships at any Government recognized research institutes.
A fresher with good theoretical knowledge about subjects related to electronics and communication can also opt for being a technical writer in the field of electronics and communication. Remember this might prove to be a great asset in increasing your exposure to the field of electronics.

What is the difference between Rx Lev Full and Rx Lev Sub ? What you mean by Link Budget? Can you explain ?

Editor — Thu, 05 Aug 2021 05:40:10 +0000

RX Lev Full :

RX Lev Full means Mobile transmit the measurement report(SACCH multiframe) for every 480ms.
This multiframe containes 104 TDMA frames, in 104 TDMA frames 4 TDMA frames for Decode the BSIC and remaining 100 TDMA frames for Average measurment of serving cell and neighbouring cell.
This average measurment of 100 TDMA frames are RX Lev Full.

RX Lev Sub :

DTX is a discontinuous trasmission, When the mobile conversation 40% of the time either Transmitter or Receive is idle. When DTX is ON, DTX will switch off the Transmitter or Receiver when they is no speech Pulses.
Only few TDMA frames will transmit, the average of this TDMA frames is called RX Lev Sub, give you proper measurement of RX level.

Link Budget :

A link budget is accounting of all of the gains and losses from the transmitter, through the medium (free space, cable, waveguide, fiber, etc.) to the receiver in a telecommunication system.

How many mobile subscribers are come under one BTS ? and how many BTS Comes under One BSC ? how many BSC under One MSC ?

Editor — Thu, 05 Aug 2021 05:33:33 +0000

The BTS used in a GSM network comprises the radiotransmitter receivers. It is the defining element for each cell .
The BTS communicates with the mobiles and the interface between the two is known as the Um interface with its associated protocols.
The BSC forms the next stage back into the GSM network. It controls a group of BTSs, and is often co-located with one of the BTSs in its group.
It manages the radio resources and controls items such as handover within the group of BTSs, allocates channels.
It communicates with the BTSs over what is termed the Abis interface.
The main element within the core network area of the overall GSM network architecture is the Mobile switching Services Centre (MSC).
It provides registration, authentication, call location, inter-MSC handovers and call routing to a mobile subscriber.

What is the type of current used by GSM Telecom Equipment ?

Editor — Thu, 05 Aug 2021 05:31:13 +0000

Current used in GSM telecom equipment is DC current.

Explanation:

Logic is very simple. AC can’t be stored and DC can be stored.
Example : Mobile is a GSM device in which DC is used to charge the batteries.

What is GSM ?

GSM (Global System for Mobile Communications) is a second-generation digital mobile telephone standard using a variation of Time Division Multiple Access (TDMA).
It is used for three digital wireless telephone technologies such as CDMA (Code Division Multiple Access), GSM and TDMA.
GSM digitizes and compresses voice data, then sends it down a channel with two other streams of user data, each in its particular time slot.
It works at either the 900, 1800 or 1,900MHz frequency bands.