AD8055 Zout = 50Ω Gain = 1 Input = -17dBm

Schematic

Fixture Response

Fixture Response Post Calibrate

LM741 Non-Inverting Amplifier

Gain = 1760/216 + 1 = 9.15 = 19.2dB Input = -17dBm 20kHz Oscilloscope gain = 289.8/31.74 = 9.13 = 19.2dB

Input = 20kHz

Input = 580kHz

VNWA S21 Add 20dB pad to Port 2

VNWA S21 Bode Plot
Calibration with 20dB pad on Port 2