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WorksheetsDEI40103- Revision Before Test
Total questions: 18
Worksheet time: 33mins
State the advantage of computer-based instruments over traditional hardware-based instruments. (1m)
Lower accuracy
Inflexibility
Difficulty in calibration
Flexibility and adaptability
Recognize the advantage of computer-based instruments is especially important in applications requiring multi-channel data acquisition. (1m)
Limited scalability
High calibration costs
Scalability to accommodate multiple channels
Poor integration with other systems
Name this device analyzer and state the function and with components used to testing. (2m)
Choose the primary function of a function generator in electronics and engineering. (1m)
Measuring voltage levels
Generating electrical waveforms
Measuring resistance
Generating random noise
Apply the DC Offset setting in the function generator will affect the ______________. (1m)
To modulate the waveform frequency
To change the waveform shape
To add a constant voltage level to the waveform
To invert the waveform
Choose the primary purpose of a Bode analyzer. (1m)
Measuring phase shift in audio signals
Analyzing the frequency response of a system
Generating square waveforms
Calculating resistance values
Explain the significance of the resistor ladder network of R-2R ladder DAC in Figure 1. (1m)
It limits the input voltage range.
It controls the resolution of the DAC.
It eliminates the need for digital input.
It affects the output impedance of the DAC.
In an AM system, describe what is the "carrier signal". (1m)
The signal carrying information.
A high-frequency signal is used to transmit information.
A signal modulated with information.
The sum of all transmitted signals.
Interpret the effect of increasing the modulation index in AM transmission. (1m)
The signal becomes less distorted.
The transmitted signal experiences less interference.
The transmitted signal becomes more distorted.
The signal becomes less sensitive to variations in the carrier frequency.
Using the settings of the function generator shown in Figure , apply the appropriate method to determine and plot the expected output waveform frequency. Justify your steps and explain any assumptions made in your analysis. (3 m)
Calculate the VRMS for the input signal of 5Vp-p. (1 m)
(a)
Draw the Amplitude Modulation when the modulation index = 2. ( 2 m)
Amplitude shift keying (ASK) is a form of amplitude that represents digital data as a variation in the amplitude of a carrier wave. The details of the ASK modulator are as follows: Bit rate 2000 bit/sec. Calculate the minimum bandwidth of the ASK and sketch the output for the digital system if the 1011 0011 0110 binary sequence is to be transmitted wirelessly. (2m)
(a)
The three most prominent digital modulation techniques are Amplitude Signal Modulation (ASK), Frequency Signal Modulation (FSK) and Phase Signal Modulation. Sketch the output signal for ASK, FSK and PSK. (3 m)
An audio signal is 25 sin 2π (1600t) amplitude modulates a carrier given a 70 sin 2π(200,000t). Than find the followings (3 m)
a.Find the modulation index and percent modulation
b.What one the frequencies of the audio signal & the carrier
c.Frequencies present in the spectrum of the modulated wave.
Explain the advantages of modulation technique. (3 m)
Show the output of an Bode Analyzer of NI Elvis. (1m)
Draw the output waveform of phase shift keying (PSK) of the input 00101 (3m)
