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#2
29th September 2016, 08:36 AM
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| Re: BSNL TTA Question Paper
The Bharat Sanchar Nigam Limited is going to hire candidates for vacant positions. It commenced the advertisements for recruiting candidates into Junior Engineer erstwhile TTA vacancies. Important dates: Event Date Starting Date 10th July 2016 Last Date to Apply Online 10th August 2016 Admit Card Downloading Date September 3rd Week BSNL TTA Exam Date 29th September 2016 BSNL TTA question paper    Some of Important Question for BSNL: 1) The Most Common Modulation System Used for telegraphy is FSK PSK PCM Single tone Modulation Two Tone Modulation 2) VSB is an Abbreviation if vestigial Sideband, is derived by Filtering DSB AM Either (a) or (b) PM 3) The Hartely Law State that The Maximum Rate of Information transmission depends on the Depth of Modulation The Maximum Rate of Information Depends on the channel Bandwith Only Binary Codes may be used Redundancy is Essential 4) The FM Signal with a Modulation index mf is passed through a Frequency Tripler. The Wave is the Out Put of the Tripler will have a modulation Index of Mf 9 Mf 3 Mf 3 Mf 9 Mf 5) In high power AM transmission, Modulation is done at Buffer Stage Oscillator Stage RF Stage IF Stage 6) Vacuum Tube Eventually Fall at Microwave Frequencies Because of their Inter Electrode Capacitance Small Series inductance Large Shunt Capacitance Short Transit Time Increase Noise Figure 7) The Biggest Disadvantage the IMP ATT Diode has is its Low Efficiency High Noise Low BW Inutility to provide Pulse Operation Low Power handling Ability 8) In AM transmission the Frequency, Which is not transmitted is Carrier Frequency Audio Frequency Upper Side Frequency Lower Side Frequency 9) FM Broadcast band lies in VHF UHF SHF HF 10) The Modulation System inherently is most Noise Resistant in SSB Suppressed carrier FM PPM PCM |