Frequency Counter 500MHz-46GHz The 5352B Microwave Frequency Counter is an automatic CW microwave frequency counter that measures to 40GHz. Wide frequency coverage, exceptional sensitivity, fast tracking speed, high measurement throughput, and wide FM tolerance are a few of the high-performance features of this counter. With a built-in microprocessor, the unit has math capabilities such as measurement scaling and offset. These functions are useful for indirect measurements