प्रकाशिक तंतु संचार में स्रोतों के रूप में प्रयुक्त LED तथा लेसर डायोड की तुलना करें।
प्रकाशिक तंतु संचार में, डेटा को लाने और भेजने के लिए मुख्य रूप से दो प्रकार के स्रोतों का उपयोग किया जाता है: LED (Light Emitting Diode) और लेसर डायोड (Laser Diode)। इन दोनों स्रोतों में कुछ समानताएँ हैं, __________ ________ ____ _______ ___ _______ ______ ____ ___ ___ ________ _____.
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a) Explain the process of instruction execution in a van Neumann machine.
फान-न्यूमान मशीन में अनुदेश निष्पादन की क्रिया समझाएं।
b) Compare LED and laser diode used as sources in optical fibre communication.
b) Explain the use of step input signal in characterizing a communication system. Why square wave signal is preferred over step input signal?
b) You have an open ended line of length. Draw the incident, reflected and resultant voltage and current waves for the current maximum at generator end.
तरंग पथक की E-समतल और H-समतल T-संधियों के बीच के भेद उचित आरेख की सहायता से स्पष्ट करें।
i) The best mode for transmitting optical signal is Line-of-Sight communication.
ii) A simple sine wave signal does not carry any information.
iii) Input impedance for an open ended transmission line of length is zero.
iv) Amplitude distortion in AM gives rise to unwanted frequency components.
v) Amplitude shift keying is modulation of digital carrier by analog signal.
vi) Mobile telephony uses time division multiplexing.
vii) Gunn devices can be built using indirect band gap semiconductors.
viii) In television, vertical scanning frequency is higher than horizontal scanning frequency.
ix) Machine language programmes are portable, while assembly language programmes are not.
x) Router can provide inter-conversion of protocols among connections.