... kHz ~ 3.0 GHz Superior Resolution : Minimum 1 Hz Compact and lightweight package Pre Amp as ... 1HzSpan Range100 Hz/div to 300 MHz/divSelection of 1, 2, 5 steps(automatic), ZERO Span, FULL ... )Reference LevelRange-90 dBm to +20 dBmResolution0.1 dB stepsAccuracy :± 1.5 dBSecond Harmonic Distortion ≤-60 dBc, -40 ... 160 dB / 6 dB ratio < 12 : 1 (9 kHz, 120 kHz)Switching Error≤ ± 1.0 dB (1kHz Reference RBW)Video ...