Table of Contents
What is digital frequency Metre?
Definition: A digital frequency meter is an electronic instrument that can measure even the smaller value of frequency up to 3 decimals of a sinusoidal wave and displays it on the counter display. It counts the frequency periodically and can measure in the range of frequencies between 104 to 109 hertz.
What is the function of frequency meter?
frequency meter, device for measuring the repetitions per unit of time (customarily, a second) of a complete electromagnetic waveform.
What is digital frequency?
1. Is a value that expresses how much of a cycle of a sinusoidal wave is represented by a sample. This value is denoted by f . For example, f = 1/2 means that 2 samples of a digital signal correspond to a sinusoidal cycle.
Which logic gate is used in digital frequency meter?
main gate
A main gate (a dual-input logic gate) controls the passage of the pulses to the count circuits. Depending on the mode of operation being used, the conditioned input signal will either be counted (e.g., frequency measurement) or be used to control the counting of time-defined pulses (e.g., time interval measurement).
How can a digital frequency meter be used to measure frequency of a signal?
A pulse of 1 s is applied to the other terminal, and the number of pulses counted during this period indicates the frequency. The signal whose frequency is to be measured is converted into a train of pulses, one pulse for each cycle of the signal.
How do you calculate digital frequency?
Frequency is the average number of times the advertisement will be presented to the Reached Population. One way to calculate frequency is to divide the number of Impressions by the Reach. Another way is to divide GRPs by Reach Percentage.
How do you measure the frequency of a digital signal?
The number of ticks of the Input Signal is then counted over the known period of time provided by theInternal Signal. Dividing the number of ticks by the known measurement time gives the frequency of the Input Signal.
What is the function of clock in digital meter?
The signal acts like a metronome, which the digital circuit follows in time to coordinate its sequence of actions. Digital circuits rely on clock signals to know when and how to execute the functions that are programmed.
What is the working principle of a digital frequency meter?
The digital frequency meter is commonly called a counter since it determines the frequency by electronically counting the number of cycles of an unknown signal in a standard time interval, usually 1 second. The following figure describes the basic working principle of digital frequency meter.
What are the different types of frequency meters?
There are different types of frequency meters to measure frequency like Deflection type, Weston frequency meter, digital frequency meter. This article gives an overview of digital frequency meter which can measure smaller values of frequency in the range of 104 to 109 hertz.
How does a pulse conversion block work on a digital frequency meter?
In above figure, pulse conversion block converts the sinusoidal signal into a discrete set of pulses. The train of discrete pulses then passes through the gate which remains open for a certain time. The electronic counter counts these pulses from gate output. The resultant value is displayed on main meter screen.
How is the frequency of a signal measured?
A frequency meter has a small device which converts the sinusoidal voltage of the frequency into a train of unidirectional pulses. The frequency of input signal is the displayed count, averaged over a suitable counting interval out of 0.1, 1.0, or 10 seconds.