0
What else can I help you with?
What is the relationship between sampling rates and frequency of the modulating signal when using pulse modulation?
The sampling rate must be at least double the highest frequency component of the modulating signal in order to avoid frequency aliasing.
Definetion of nyquist rate in digital communication?
if the sampling rate is twice that of maximum frequency component in the message signal it is known as nyquist rate
Why low pass filters are required in demodulation process?
Demodulation takes place to extract the low-frequency signal from the high-frequency carrier, using a nonlinear process that produces components at the signal frequency. The LP filter is used to eliminate the high-frequency carrier component from the signal so that it does not cause problems at a later stage in the amplification of the signal.
The small amount of ac signal present on the output of a filtering network for a dc power supply is known as?
Ripple.
How you can convert an electrical signal into an optical signal?
electrical signal can be converted to an optical sigal by using a LED or SOA(semiconductor optical amplifier). LED is the cheaper option but have the drawback of larger linewidth. Typically used for LAN (local area network). SOA produces an optical signal mostly by direct modulation tecnique .
What is distortion in data communication?
when some of the component are being delayed compared to other component, so the resulting signal will be different from original signal.
Which component of the electric signal gets amplified if it is sent as input to an amplifier Explain?
The component that gets amplified will depend on the type of amplifier we are using. In general the voltage component of the signal gets amplified.
What is the definition of a composite signal?
A composite signal is a mux or a bus signal. These can be thought of as a collection of other component signals.
In a network that uses the star topology what is the signal that is sent to indicate a signal collision?
Jam signal
Bandwidth of digital signal is infinite?
A digital signal is actually a complex signal. Consider the horizontal part of a digital signal as a component with 0 frequency and the vertical part of the signal as the component of infinite frequency. Also, consider the change from the horizontal to vertical as all the frequencies. Then we can claim that a digital signal is complex signal with frequencies from 0 to infinite.A digital signal is a composite analog signal with an infinite bandwidth.
How do you protect against a signal jammer?
how do we protect our cable network from signal jammer
What signals are used for the maintenance and overall operation of the network?
Network Management signal
Can you split from standard video yellow to ypbpr?
A single cable carrying video will be carrying a composite video signal. This signal has brightness and two color signals encoded into a single signal. To generate a component signal (YPbPr)a video decoder is required. They are available from many sources from low cost domestic units to stunningly expensive broadcast models. The better the decoder, the better the resulting image. It is very important to understand that a composite signal has suffered losses because of the encoding. Decoding the signal to component does not restore that quality. Component interfaces can handle high definition as well as standard definition signals. Decoding a composite signal will result in a standard definition signal. Connecting it to a high definition input will not result in a high definition signal. Normally, the only reason to decode the signal to component is to interface to a device that only accepts component signals.
Which device is used to prevent a signal from bouncing on a thinnet network?
A 50 Ohm Terminator is used at each end of the network to prevent signal reflections.
What types of component video are there?
Component video is a video signal that has been split into multiple component channels. There are two types of it, RGB analog component video and Luma-based analog component video.
What network hardware device regenerates a signal and broadcasts it to every computer on the network?
hub
Is it A passive hub is a network device that regenerates received signal and sends then along the network?
a passive hub does not regenerate the signal received only let it pass
