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Signal modulation
Modulation involves the modification of some property of a (usually sinusoidal) carrier waveform. The process of recovering the original signal from the modulated signal is called 'demodulation'. The most common modulation methods are:• amplitude modulation• frequency modulation• pulse code modulation.Modulation of a high frequency carrier by a lower frequency signal allows:
• convenient transmission by high frequency radio waves • shifting of the frequency range occupied by a signal so that multiple signals can be packed into the available bandwidth of the communication link and transmitted simultaneously.
Also called 1-bit DAC or sigma-delta DAC. It uses pulse-density modulation (PDM) which encodes the signal amplitude by the relative density of the pulses. The output voltage has on
APPLICATION TO THE AXIAL FLOW COMPRESSOR: In order for the compressor to deliver a high mass airflow for a minimum effort required to drive it, it is important that all the com
Inlet duct arrangement in Aircraft Engine: Wherever the APU is located, ducting will be required to bring air to the APU inlet. In figure 18.9. we can see that the inlet duct
Means of escape: The means of escape can start at any point inside a building where there may be people. The means of escape end when 'ultimate safety' is attained out
I have a 30'' simple span beam, braced at the supports only. Uniform load is 1200 plf. I need deflection limited to L/400. What size steel beam do I need?
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Oil tank: The oil tank is usually mounted on the engine; it may be a separate unit or part of an external gearbox called the sump. It has provision to allow the system to be f
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