Keysight / Agilent 8407A Network Analyzer Features Test and Reference Channel Input Normalizer Interconnect Port Measurement Range from +90 dB to -100 dB Description The Agilent / HP 8407A Network Analyzer is a ratio meter using both a test and reference channel input. The 8407A forms the magnitude ratio and phase difference between these two input signals after their conversion to a constant immediate frequency. The resultant signals are routed to a display for detection and display. The 8412A Phase-Magnitude display is an accurate oscilloscope readout displaying amplitude and phase versus frequency either separately or simultaneously. Dynamic range is 80 dB with the 8412 Phase-Magnitude Display, measurement range is from +90 dB to -100 dB. Measurements with 0.05 dB and 0.2 degree resolution are possible.