At a recent checkup, I was shocked: Even though I was eating foods rich in saturated fat and a seemingly more indulgent diet, my total cholesterol was down 10 points, my bad LDL cholesterol was stellar, and my good HDL was the highest it's ever been.
As the frequency of the signal to be measured increases to approach the frequency of the source frequency, measurement error increases. To improve the accuracy of the frequency measurement for higher unknown frequency, we can use this second measurement method, count number of pulses in known time.
Hertz is a frequency measurement unit. The SI unit of frequency is a frequency equal to one oscillation or cycle per second. The unit has a special name, the hertz (Hz), after German physisist Heinrich Rudolf Hertz who first experimentally demonstrated electromagnetic theory of light.