18 Questions
What is the purpose of the output amplifier in the circuit?
To provide two waves at the output simultaneously
What type of signal is obtained at the output of the comparator?
Square wave
What is the purpose of the resistance diode network in the circuit?
To change the slope of the triangular wave with distortion less than 1%
What is used to display the captured signal?
Oscilloscope
What depends on the current supply by the sources in the block diagram?
Frequency of the triangular wave
What is the shape of the wave at the output of the integrator?
Triangular
What is the purpose of the amplifier in a digital/electronic type frequency meter?
To increase the signal strength before it is supplied to the schmitt trigger
What is the output of the schmitt trigger in a digital/electronic type frequency meter?
A square wave
What is the function of the start – stop gate in a digital/electronic type frequency meter?
To control the flow of input pulses to the counter
What is the formula used to calculate the frequency of the unknown signal in a digital/electronic type frequency meter?
f = N/t
What is the purpose of the counter in a digital/electronic type frequency meter?
To count the number of pulses during the gate open time
What is the type of frequency meter that measures frequency using an alternating flux when connected across the supply?
Reed type frequency meter
What is the primary function of a sample and hold circuit?
To hold a changing analog signal for further processing
What is the purpose of a digital signal processing unit?
To process digital voltage and current samples according to program instructions
What is stored in the reserved memory locations of the instrument?
Maximum power data values along with their time of occurrence
What is the purpose of the RF oscillator in a signal generator?
To generate a carrier signal with a frequency range of 100 kHz to 30 MHz
What is the purpose of the selector switch in a signal generator?
To select the frequency of the carrier signal
What is the purpose of the algorithm in the instrument?
To compare the present value of power with the past maximum power value
This quiz covers the principles and workings of voltage controlled oscillators, including the role of frequency control voltage, current sources, and integrators in regulating output voltage.
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