With proper consideration and technique, DTF measurements of raw spools of cable can be made accurately enough in the field to identify handling damage with a reasonable uncertainty bound. This complements the other specification based measurements already done on the spools using frequency domain data. It is important to note that the same cannot be said for DTF testing of complete antenna systems. In this circumstance the frequency limiting aspects of the system and the ambiguity in the load termination (antenna) make pass/fail testing of components in the entire system problematic. This white paper discusses the best course of action to take for making baseline measurements for future comparison, and provides measurement examples.