The 538B is a high-performance, highly reliable counter for basic microwave counting applications. 10Hz to 26.5GHz in three bands ensures coverage for maximum flexibility in the lab, factory, or in the field. Super-fast tracking speed (up to 400 MHz/Sec), and 10 Watt damage protection circuitry are just examples of the features the 535B has to offer. Sensitivity typically 15 mV rms from 10 Hz to 100 MHz, typically -25 dBm from 1 to 20 GHz. 12-digit LED provides resolution and a bright, quickly-read display, while an easy-to-use control panel allows even inexperienced operators to readily learn control sequences.