Abstract: A flowmeter (M) measures fluid flow in a system and produces a train (Si) of digital pulses representing the measured flowrate. The frequency of the pulses is intended to be proportional to the flowrate. A preamplifier (10) controls generation of output pulses (Fn, Fq) of an output digital pulse train (So). The preamplifier first decodes the digital pulse train using a phase discriminator (14). Output pulses from the discriminator are counted (at 24 and 46) to count the number of pulses and their frequency of occurrence. A frequency multiplier (40) is responsive to the pulses and their occurrence to generate each pulse of the output pulse train. Generation of these pulses involves use of a scaling factor (Vcf) by which meter performance factors, drift, and the fluid flow environment are taken into account.