Advantest R3770 Overview The Advantest model R3770 is an RF network analyzer. Specifications: Frequency Accuracy: +/- 10 ppm Frequency Range: 300 kHz - 20 GHz Frequency Resolution: 1 Hz Output Impedance: 50 ohms Output Power Range: -22 dBm - +10 dBm Output Resolution: .001 dB Sweep Range: 300 kHz - 20 GHz