Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Describe the time division switching?
Ans:
Space and Time Switching:
Space Switches: Connections can be made between outgoing and incoming PCM highways by means of a cross point matrix of the form displayed in Figure. Thoughdifferent channels of an incoming PCM frame may need to be switched by various cross points in order to reach different destinations. The cross point is hence a two-input AND gate. One input is connected to the incoming PCM highway and the other to a connection store that produce a pulse at the required instant. A group of cross points gates can be implemented as an integrated circuit, for instance by using a multiplexer chip.
Figure demonstrates a space switch with k incoming and m outgoing PCM highways, each one carrying n channels. Connections store for every column of cross points is a memory with an address location for every time-slot that stores number of the cross points to be operated in that time slot. This number is written into address by controlling processor in order to setup connection. Numbers are read out cyclically, in synchronism with incoming PCM frame. In every time slot, number stored at the corresponding store address is read out and decoding logic converts this into a pulse or a single lead to operate relevant cross point.
As a cross point can make a different connection in each of the n time-slots, its equivalent to n cross points in a space division network. Complete space switch is hence equivalent to n separate k x m switches in a space division switching network.
Speed Control Using Phase Controlled Converters Phase controlled converters converts a constant ac voltage into variable controlled dc voltage. This variable dc voltage
What is hall effect?
how did shockley derived his equation
Explain the meaning of Ring Counters? A ring counter is fundamentally a circulating shift register in which the output of the most significant stage is fed back to the input of
Q. What do you mean by Dearness Allowance? Ans: Dearness Allowance is in the type of compensation for Established increase in the cost of living and comprised of Dearness All
Q. Can you explain twos Complement Division? 2's complement division is repeated 2's complement subtraction. The 2's complement of the divisor is calculated, and then added to
Explain LDA, STA and DAA instructions LDA copies the data byte into accumulator from the memory location particular by the 16-bit address. STA copies the data byte from the acc
With the help of neat sketch T-S diagram illustrate the working of simple air evaporative cooling system used in air craft. With the help of neat diagram and T-S diagram iillust
The magnetic fields can be plot by using: i. Compass ii. Iron dust method .
A four-pole, three-phase, wound-rotor induction machine is to be used as a variable-frequency supply. The frequency of the supply connected to the stator is 60 Hz. (a) Let the r
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd