The HP Model 8754A Network Analyzer consists of an internally leveled, 4- to 1300-MHz, swept source. Polar or rectangular measurements are displayed on a cathode-ray tube (CRT) through two independent channels. With appropriate signal-routing accessories, the 8754A is a fully integrated stimulus/response test system that measures magnitude and phase characteristics of linear networks by comparing the incident signal with the signal transmitted by the device under test or reflected from its input. 1-20. The basic transmission measurements are insertion loss or gain, insertion phase, and transmission coefficient (S2i or Si2)· The basic reflection measurements are return loss, from which SWR can be calculated, and reflection coefficient (Sjj or S22X from which impedance can be calculated or read from a Smith chart overlay.