Additional Features: Frequency range: 1 kHz to 6.5 GHz Synthesized tuning Frequency counter Factory adjusted preselector AM/FM demodulators Portable AC Power Source Mass Memory Module Test and Adjustment Module MIL-T-28800C Rugged Lightweight and POrtable The Agilent 8561A Spectrum Analyzer provides up to 118 dB dynamic range and offset tracking capability when synthesized sources are used for stepped distortion and stepped conversion-loss measurements. The Agilent 8561A is a high-performance, synthesized technology, lightweight & rugged analyzer all in a portable package. The Agilent 8561A Spectrum Analyzer has dedicated keys with large, easy-to-read lettering to provide basic tune, zoom and measure steps.