Measuring 4 x 1.8 x 9 in. and weighing less than 2 lb, Model 2640 has frequency range of 100 kHz to 2,000 MHz, noise floor of -110 dB to detect weak signals, and basic spectrum analyzer functionality. It has 2 GHz frequency counter, phase-locked loop for precise frequency tuning, detachable antenna, and backlit display. Meter supports RS232C serial communication, detects wide band and narrow band FM, AM, and SSB signals, and scans and displays up to 160 channels.