18 Questions
What is the process of converting analog signals to digital signals called?
Analog to Digital Conversion
What is the purpose of the low pass filter in the receiver?
To decode and reconstruct the signal
What is the duration of the sample pulse dependent on?
The duration of the switch being closed
What is the name of the modulation technique used in this process?
Pulse Amplitude Modulation
What is the switch control signal shown as in the figure?
A pulse train
What is the output of the switch when it is open?
Zero volts
What is the primary reason digital transmission has replaced analog in commercial communications applications?
Resistance to interference caused by electrical noise
What is the process of converting an analog signal to digital signal?
Sampling
What is the purpose of the digital sampling signal in the figure?
To tell the sampling circuit when to measure the message
What is the purpose of the micro-switch under the EX-OR GATE module?
To switch between the message signal and the sampled signal
What is the result of 'naturally' sampling the message at the rate set by the sampling signal?
A changed sample
What is the frequency of the DIGITAL output from the Master Signals module?
8.33kHz
What is the characteristic of digital signals that makes them suitable for transmission in commercial communications applications?
Resistance to interference caused by electrical noise
What is the purpose of the electronically controlled switch in the block diagram?
To connect the message signal to the output
What is the significance of the 2.08kHz SINE output from the Master Signals module?
It is the message signal being sampled
Why is sampling required in digital transmission systems?
To convert analog signals to digital
What is the purpose of the oscilloscope in the experiment?
To observe the message and sampled signals
What is the role of the MUX module in the experiment?
To sample the message signal
This quiz covers Sampling and Reconstruction theories and their applications in digital communications. It discusses the replacement of analog signals with digital transmission in commercial communications. Topics include the theory and background of digital transmission.
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