Electronic engineers often need to measure frequency, time interval, phase and event count, accurate measurement can not be separated from the Universal Frequency Counter or its like products, such as electronic counters,time interval analyzer or Spectrum Analyzer. These Electronic Instruments provide research and development with high accuracy and analytical capabilities, high efficiency for mass production and low cost and portability for maintenance. The earliest electronic counters were designed to count things like atomic phenomena. Before inventing the counter, the measurement of the frequency was done using a frequency meter, a low precision coordination device. Frequency Counter is one of the first instruments to digitally measure signal parameters.