what is the significance of 4-20ma signal in hart protocol

2 Answers   IBM, Wizard Electronics,

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What is D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? Explain an ideal voltage source? Explain zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain half-duplex and full-duplex communication? Which range of signals is used for terrestrial transmission? Why is there need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB? Explain ASCII, EBCDIC?

3 Answers   DRDO, Electronics,

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i want to know about EPBX system in detail

12 Answers   Artefact Projects, India Infotech, Mannar Company, MNC, Siemens, Slash Support, TCS,

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difference between neutral ground and phase

3 Answers  

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what is operating ratio in railway

1 Answers  

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generic values for: • Maximum power • Emission bandwidths and modulation types • Frequency ranges, frequency stability, attenuation of intermodulation products and selectivity of a quadband dual simm chinese cellphone?

1 Answers  

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What is ssb modulation?

0 Answers  

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difference between USB net modem & GSM interface modem? Can we use usb modem in the place of GSM modem for wireless application? Also tell me Why we use AM for long distance communication but not FM(why do we use frequency reuse concept in FM radi only)

0 Answers  

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i have taken gre exam twice... first time i got 287( quant:154 & verbal: 133) second time i got 288(quant:149 & verbal:139) is there possibility to take universities -----quant:154& verbal:139....TOTAL=293 can u plz give me information regarding this............. if it is possible for some universities plz give me 5 best universities plz.........

0 Answers  

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3 girls are wearing 3 different colored outfits red,white,black.Each outfit involves dress of that color,matching socks&shoes.The girls decide to exchange their shoes such that each girl ends up with ! hoe each from the other two girls How many legs will u've to look at,to exactly know color of shoes on right&left leg of each girl?

2 Answers  

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What is a schmitt trigger?

0 Answers  

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when you are from engineerng back groung student then y r u choossng bank job? plz give me best answer

0 Answers   Banking,

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