What key instrument would you use to test a phaselocked loop

What key instrument would you use to test a phase-locked loop oscillator? Digital multimeter Storage oscilloscope Frequency counter DIP switch with LEDs A digital phase-locked loop in an IC controls the frequency of the arithmetic-logic unit. random-access memory unit. reference oscillator. voltage-controlled oscillator.

Solution

4

A phase-locked loop (PLL) is an electronic circuit with a voltage or voltage-driven oscillator that constantly adjusts to match the frequency of an input signal. PLLs are used to generate, stabilize, modulate, demodulate, filter or recover a signal from a \"noisy\" communications channel where data has been interrupted.

So the instrument used to test a phase locked loop oscillator is FREQUENCY COUNTER .

5 . A Digital phase locked loop in an IC controls the frequency of the Voltage controlled oscillator .