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Q. What is Time Switches?
Principle of a time switch is displayed in Figure. It connects an incoming n channel PCM highway to an outgoing n channel PCM highway. As any incoming channel can be connected to any outgoing channel, its equivalent to space division cross point matrix with n incoming and n outgoing trunks, as displayed in Figure. Time-slot interchange is carried out by means of two stores, each having a storage address for every channel of PCM frame. The speech store contains the data of each of the incoming time-slots (that is its speech sample) at a corresponding address. Each address of connection store corresponds to a time slot on outgoing highway. It comprises the number of time-slot on the incoming highways whose sample is to be transmitted in that outgoing time-slots. Information is read into speech store cyclically in synchronism with the incoming PCM systems; though, random access read out is used. Connection store has cyclic read out however writing in is non-cyclic. To establish a connection, number (X of the time-slot of an incoming channel is written into the connection store at the address corresponding to the selected outgoing channel (Y).During each cyclic scan of speech store, incoming PCM sample from channel X is written into address X. During each cyclic scan of connection store, number X is read out at the beginning of time-slot Y. This is decoded to select address X of speech store, whose contents are read out and sent over the outgoing highway.
Draw the block diagram of TDM-PCM system. Explain each block. Calculate the bit rate at the output of this system
Aims More practice using data movement and control flow statements. Understand techniques to interface microprocessors with external switch-based hardware. Write P
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Zero Flag Since results is non zero in this example zero flag is reset.
Q. What are the benefits of ccs over in-channel signalling? The benefits of CCS over in-channel signalling are listed below: a. Information can be exchange between processor
Fermi Dirac level: Sol. The Fermi level is simply a reference energy level. It is the energy level at which the probability of finding an electron n energy unit above it in
Q. A single-line diagram of a three-phase transformer bank connected to a load is given in Figure. Find the magnitudes of the line-to-line voltages, line currents, phase voltages,
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Explain instruction sets of 8085. a) Data transfer group - MOV, MVI, LXI. b) Arithmetic group - ADD, SUB, INR. c) Branch group - JMP, JNZ, CALL. d) Logical group -
Question: a). For the circuit shown in figure state which operation is performed and draw the output waveform if measured between points A and B. The input signal is given in f
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