| 摘要 |
FIELD: measurement equipment.SUBSTANCE: digital frequency meter comprises a logical unit, a reversible count unit, a unit of logical formation of time interval of measurement, a unit to define the time interval, a counter of periods of measurement interval, a device to control accuracy of frequency measurement, a buffer of pulse quantity, a buffer of initial setting of the reversible count unit, a buffer of time interval, a buffer of minimum time interval, a buffer of normalising coefficient, a buffer of digitisation period, a bus interface, a generator of pulses of reference frequency.EFFECT: expanded range of frequency measurements and reduced relative error of measurements.2 dwg |
