KEYSIGHT's N9916A-215 option 215 adds time domain reflectometry (TDR) measurements to CAT mode. The measurements include TDR (linear rho) and TDR impedance (Ohm).TDR measurements are useful in not only identifying the location of faults along with cables, but also the nature of the fault. Resistive, inductive, and capacitive faults will each have a different response. These differences help line-sweep technicians in the…KEYSIGHT's N9916A-215 option 215 adds time domain reflectometry (TDR) measurements to CAT mode. The measurements include TDR (linear rho) and TDR impedance (Ohm).TDR measurements are useful in not only identifying the location of faults along with cables, but also the nature of the fault. Resistive, inductive, and capacitive faults will each have a different response. These differences help line-sweep technicians in the troubleshooting process.FieldFox's TDR measurements are based on an inverse Fourier transform of the frequency-domain data. The Y-axis is either linear (rho) or impedance. The X-axis is distance.*This factory-installed option is for quoting purposes only. Only available with the purchase of a new main unit. Please contact a Tessco representative for a customized SKU. Read More