The 3585B Spectrum Analyzer delivers high performance where it counts - at baseband frequencies. With very high accuracy, resolution, and dynamic range, this unit is the best solution for signal analysis at the critical frequencies comprising voice, video, or digital information. In today's high speed, high-density information processing systems, maintaining the integrity of data signals requires more measurement performance than ever before. The 3585B provides 80 to 100 dB of spurious-free dynamic range, a sharp 3Hz resolution bandwidth, and a 20Hz to 40.1MHz frequency range to easily cover most information bandwidths. Fully synthesized tuning (including sweeps) and typical amplitude accuracy to ±0.25 dB ensure complete measurement confidence. " Option 001 = Sweep Gating " Option 002 = Field Installable Sweep Gating Kit