M&MA

Comparison between AC and DC servo systems : Sr. No. AC servo systems DC servo systems 1.                       Efficiency is low Efficiency is high 2.                       Low power output High power output 3.                       It requires less maintenance It requires frequent maintenance 4.                       Less stability problems More stability problems. 5.                      Smooth operation Noisy operation. 6.                      It has non-linear characteristic It has linear characteristic Comparison between AC and DC servo systems Video: Comparison of stepper motor with DC servo motor Basics of Multiplexing HOW MOBILE NETWORK WORKS WITH GMSK MODULATION TECHNIQUE ? Comparison in FDM and synchronus TDM and statistical TDM How Multiplexing of signals in Fiber Optical cable

Comparison of stepper motor with DC servo motor : sr . No. Stepper motors DC servo motor 1. Control winding is not present. Control wingding              is present 2. Stepping              rate        is governed by frequency of switching and not by supply voltage. Does not rotate in steps. 3. Number of steps can be precisely controlled by controlling the number of pulses. DC servo motor gives continuous rotation. 4. Brushes are absent. Brushes are present 5. Maintenance is low High  maintenance 6. Due        to            load/no                load conditions no change in running current. Due        to            load/no                load conditions           sufficient change in            running current. Comparison between AC and DC servo systems Comparison of stepper motor with DC servo motor

Comparison between armature controlled and field controlled DC servo motor : Field controlled DC servomotor Armature controlled DC servomotor 1.                         Field is excited by control voltage Armature is excited by control voltage 2.                        Armature            current kept constant Field      current kept constant 3.                        Required             low        power amplifiers are simple to design Required             high       power amplifiers 4.                        Efficiency is poor Efficiency is better 5.                        It has large time constant It             has         small      time constant 6.                        Cost is low Cost is high 7.                        It is open loop system It is close loop system Comparison between ar

Comparison between IPv4 options and IPv6 extension headers: Comparison               1 . The header length field is eliminated in IPv6 because the length of the header is fixed in this version. 2.The service type field is eliminated in IPv6. The priority and flow label fields together take over the function of the service type field. 3.The total length field is eliminated in IPv6 and replaced by the payload length field. 4.The identification, flag, and offset fields are eliminated from the base header in IPv6. They are included in the fragmentation extension header. 5.The TTL field is called hop limit in IPv6. 6.The protocol field is replaced by the next header field. 7.The header checksum is eliminated because the checksum is provided by upper-layer protocols; it is therefore not needed at this level. 8.The option fields in IPv4 are implemented as extension headers in IPv6.

Socket Programming: "An application programming interface (ATI) use for interprocess communication (IPC) . A well defined method of connecting two process locally or across a network it is protocol and language interdependent and often referred as Berkeley socket or BSD Socket."

Installation and configuration of DNS Server: "There are several applications in the application layer of the Internet model that follow  the client/server paradigm". The client/server programs can be divided into two categories: Client server DNS those that can be directly used by the user, such as e-mail, and those that support other  application programs.The Domain Name System (DNS) is a supporting program that  is used by other programs such as e-mail.

IIR Filter design Concept of filter design:     "Analog filters are designed using analog components like resistors (R), inductance (L) and capacitors (C).while digital filters are implemented using difference equations& can be done using C or assembly language we can easily change the algorithm so we can easily change the filter characteristics according to our requirement".

How Mobile Network works with GMSK  Modulation Technique ? Answer: "Gaussian Minimum Shift Keying or Gaussian filtered Minimum Shift Keying, GMSK is the form of modulation with no phase discontinuities & it is used for data transmission due to efficient spectrum usage." GMSK Introduction : MSK modulation

E-Shape Microstrip Patch Antenna for Pervasive  Wireless Communication at 14GHz (Ku Band): "Changing the shape of antenna will result in changed Radiation pattern so as to improve or locate required area changes in the conductive part of antenna should be done".

Comparison of QPSK and QASK comparison of QPSK and QASK Quadrature Amplitude Shift Keying (QASK), Quadrature Phase Shift Keying (QPSK).

comparison of QPSK and BPSK comparison of QPSK and BPSK

Bit padding in Synchronous TDM : "Till now we have assumed that the data rate of all the channels is the same ". But practically it won't so. We will have to multiplex channels having different data rates.

why we are using impulse signal for analysis of any control system? Impulse signal spectrum      "In signal processing, the impulse response, or impulse response function, of a dynamic system is its output when presented with a brief input signal, called an impulse". 

How Multiplexing of signals in Fiber Optical cable is done? The data transmission properties of optical fiber are well known and settle on it the media of decision for rapid information and feature  applications. In any case, different manifestations of multiplexing are obliged to exploit this data transfer capacity. Time division and 

Dense wavelength division multiplexing  (DWDM)             " The emergence of DWDM is one of the most recent and important phenomena in the development of fiber optic transmission technology. In the following discussion we briefly trace the stages of fiber optic technology and the place of DWDM in that development. We then examine the functions and components of a DWDM system, including the enabling technologies, and conclude with a high-level description of the operation of a DWDM system". Wdm with two channels