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!
Explain FDM and show how CCITT standards help in building the base band?
Frequency Division Multiplexing: This is the process of combining some information channels through shifting their signals to various frequency groups in the spectrum therefore they can be transmitted simultaneously over common transmission service.
The bandwidth of a telephone speech signal is quite less than 4 kHz. Where, the available bandwidth on unloaded cables pair is fine above 100 kHz. Therefore this is possible, by using modulation techniques, for divide up the cable bandwidth then a number of telephone speech paths can be carried at the same time along a single cable pair. The normal arrangement contains 24 telephone channels per cable pair, the modulation in 24 channels being carried out within the two stages. In the primary stage, 12 channels are multiplexed together to form that is commonly termed as a basic group. This basic group arrangement is demonstrated in figure. Each of the 12 telephone signals are single side-band amplitude modulated on to carriers spaced at 4 kHz intervals 64 kHz to 108 kHz. The lower side-band (LSB) is utilized in every case. The 12 base-band signals are thus translated in the frequency band from 60 kHz 108 kHz as demonstrated. The block diagram for the channel translating equipment is specified in figure. To form a 24-channel system, to basic groups are occupied together. One basic group (B) is transmitted directly as this stands. Another basic group (A) is amplitude modulated on to a carrier are 120 kHz and the lower side-band is occupied such as to take the frequency range from 12 kHz to 60 kHz as demonstrated in figure. by using two stages of modulation for basic group A, this is possible to decrease the physical size of the component needed for the LSB filters of the figure, because the lowest cut- off frequency needed is at 64 kHz quite than 12 kHz when the whole block of 24 channels were assembled together in one stage of modulation.
FIG - Basic Group Arrangement
FIG - Channel Translating Equipment
A large numbers of computers in a wide geographical area can be efficiently connected using? A large numbers of computers in a broad geographical area can be efficiently linked
Now we will learn how to compile and run PVM programs. To compile the program change to directory pvm/lib/archname where archname is architecture name of your computer. Then the su
Write an application that prints the hundreds digit in two integers read from the keyboard. For example if the data values are 1456 and 255 respectably, output should include the
Define the difference between static RAM and dynamic RAM? The RAM family comprises two important memory devices that are static RAM (SRAM) and dynamic RAM (DRAM). The main diff
Interfacing Subroutines with Parameter Passing Let's now write a C program which calls the assembly program for parameter passing. Let's extend the previous two programs such t
Determine the block diagram of bcd adder To add 0110 to binary sum, we use a second 4-bit binary adder. The two decimal digits, together with input-carry, are first added in to
AI Applications Search is a crucial component of an AI system, and the search functions are performed over large quantities of difficult structured data using unstructured inpu
Sigmoid units - Artificial intelligence Remember that the function inside units take as input the weighted sum, S, of the values coming from the units associated to it. The fun
Illustrate 16-bit ISA? Compare it with 8-bit ISA bus. The only difference between 8 and 16-bit ISA bus is that an extra connector is attached behind the 8-bit connector. 16-b
Q. How to convert Binary to Octal and Hexadecimal? Rules for these conversions are simple. For converting binary to octal binary number is splitted in groups of three, that are
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