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Question 1
(a) Describe the functions of the modulator and source encoder in a digital communications system.
(b) By using appropriate examples, distinguish between the simplex and half duplex mode of communication.
(c) Briefly illustrate what is meant by the physical topology of a network. Given that there are n devices in a network, what is the number of cable links required for the following topologies:
(i) Mesh (ii) Ring (iii) Bus (iv) Star
(d) Identify which layer of the OSI model each of the five functions below is most likely to belong to. It is also possible that one or more of the functions cannot be mapped to an OSI layer. If this is the case, explain why.
(i) Translating between EBCDIC to ASCII (ii) Defining the pin-outs in a connector used to attach to a network cable (iii) Generating error correction codes for packet error correction (iv) Arbitrating between multiple nodes attached to a single medium (v) Providing an interface to a visual packet monitoring program
(e) Why is digital transmission better than analog transmission over a long distance where repeaters are needed in any case? Give two advantages of digital transmission over analogue transmission.
Illustrate the construction and working of:- (i) Pressure Thermometer (ii) Selective Radiation Pyrometer (iii) Thermistor (iv) Laws of Thermocouple
Potentiometric type DVM: A potentiometric type of DVM, employs voltage comparison technique. In this DVM the unknown Voltage is compared with a reference voltage value is fixed by
The pre-processing unit is responsible for taking the conditioned output from the heart sensor and generating a binary count during time T1 of this waveform (datain). It will compr
Write explanatory notes on Microprocessor development system. Microprocessor development system : Computer systems have undergone several changes recently. Machines which
DESIGN SR LATCH WITH UNIVARSAL LOGIC GATES.DRAW AND EXPLAIN THE LOGIC DIAGRAMS
A unity negative feedback control system has an open loop transfer function consisting of two poles, two zeros and a variable positive gain K. The zeros are located at -2 and -1, a
You have been requested by your Senior Engineer to design an Engine Control Unit (ECU) and prepare a report detailing your proposed solution. The client requires a design for a mic
I want project ideas.
1. Describe the magnetic effects of current? ( to achieve a pass grade, describe the magnetic effect of current) 2. Complete the diagram to show the direction of mo
Astigmation control: In most modern oscilloscopes there is an additional focusing control marked Astigmation . This is used to correct an effect which exactly is analogous to
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