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Voltage Controlled Oscillators

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Questions and Answers

What is the purpose of the output amplifier in the circuit?

To provide a single wave at the output
To provide two waves at the output simultaneously (correct)
To change the slope of the triangular wave
To regulate the frequency control voltage

What type of signal is obtained at the output of the comparator?

Square wave (correct)
Sine wave
Triangular wave
Sawtooth wave

What is the purpose of the resistance diode network in the circuit?

To provide a single wave at the output
To supply a reverse current to the integrator
To regulate the frequency control voltage
To change the slope of the triangular wave with distortion less than 1% (correct)

What is used to display the captured signal?

Oscilloscope (D) Signup and view all the answers

What depends on the current supply by the sources in the block diagram?

Frequency of the triangular wave (D) Signup and view all the answers

What is the shape of the wave at the output of the integrator?

Triangular (A) Signup and view all the answers

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 (D) Signup and view all the answers

What is the output of the schmitt trigger in a digital/electronic type frequency meter?

A square wave (D) Signup and view all the answers

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 (B) Signup and view all the answers

What is the formula used to calculate the frequency of the unknown signal in a digital/electronic type frequency meter?

f = N/t (A) Signup and view all the answers

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 (C) Signup and view all the answers

What is the type of frequency meter that measures frequency using an alternating flux when connected across the supply?

Reed type frequency meter (D) Signup and view all the answers

What is the primary function of a sample and hold circuit?

To hold a changing analog signal for further processing (D) Signup and view all the answers

What is the purpose of a digital signal processing unit?

To process digital voltage and current samples according to program instructions (D) Signup and view all the answers

What is stored in the reserved memory locations of the instrument?

Maximum power data values along with their time of occurrence (A) Signup and view all the answers

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 (C) Signup and view all the answers

What is the purpose of the selector switch in a signal generator?

To select the frequency of the carrier signal (A) Signup and view all the answers

What is the purpose of the algorithm in the instrument?

To compare the present value of power with the past maximum power value (B) Signup and view all the answers