Ensuring future strong market success for a product under development first implies either meeting or exceeding compliance with complex protocol signals or custom modulations. RF testing challenges at component level are diverse to ensure RF transmitters meet specifications across numerous test conditions; understand application-specific digitally modulated signals, making accurate RF measurements, isolating test set induced distortion and identifying as well as preventing interference are among major test hurdles. SATCOM and 5G market requirements increasingly drive the test development focus towards enabling both RF and time domains characterization techniques that will be discussed in this workshop.