Even with rapid frequency measurements up to 2.4 GHz (usable up to 2.6 GHz), the C3100 programmable universal frequency counter features ±2-ppm accuracy and 0.00001-Hz resolution (at 200 Hz). It measures frequency, period, duty cycle, rpm, frequency ratio, difference frequency, time intervals, and totalization. Comparisons, relative errors, trend graphs, and min/max functions can be displayed on its LCD screen. Up to eight setup screens can be saved and retrieved from memory. The unit has a standard RS-232 interface and an optional GPIB interface. The C3100 costs $429 and is available from the company's nationwide distributors.
Protek, a division of Cigma Technologies