What is a frequency counter?

• A device used to measure the speed of a moving object.

• test instruments used in many applications within the RF field to accurately

  measure the frequency of signals.

• A tool used to measure the amount of electricity passing through a circuit.

• A device used to measure the intensity of light.

What are frequency counters used for?

• Frequency counters are used to measure the speed of a motor.

• Frequency counters are used to measure the temperature of a room.

• Frequency counters are used to measure the voltage of a battery.

• Frequency Counters are used for measuring the time between edges on digital signals,

  counting the number of times a signal passes a give voltage (trigger) point in a given time

To ensure the best accuracy, ​ (a)   (XO) are used to provide a stable frequency

in order to deliver a precise timing reference.

• quartz crystal oscillators
• flux capacitor
• oscillators

Complete the formula.

• time in meters

• time in seconds

• back in time

• time in hours

The time of the frequency counter is

set to count at every ​ (a)   .

• second
• minute
• hour
• day