Properly measuring end-to-end loss in coaxial and waveguide systems can present significant challenges once those systems are permanently installed (embedded) and their physical ends are located at far distances away from each other. In this application note, we will show how it is possible to easily and accurately measure end-to-end loss and reflection on embedded coaxial transmission systems using a swept frequency range, where each end of the system is separated by long physical distances. We will also demonstrate how the S820E is also capable of performing these measurements with only one calibration required.