Abstract : The tasking to conduct an ADS-based EW test called for an airborne self-protection jammer (SPJ) as the system under test (SUT). The emphasis of the EW Test was on the performance of the ADS components and their contribution or impact to testing rather than on the performance of the SPJ pod itself. Measures of performance (MOPs) for the SPJ were identified as measures that would most likely be affected by distributed testing. Statistical comparison of the MOPs became the methodology for evaluating ADS. JADS evaluated distributed test control and analysis, network performance, relationships between data latencies, and ADS-induced data anomalies. Time, cost, and complexity, as well as validity and credibility of the data, were part of the evaluation. The EW Test was designed as a three-phase effort. The first phase provided a baseline of jammer performance data in a non-ADS environment that was then compared to the data collected in the second and third phases using an ADS environment. The second phase used a digital system model of the SPJ representing an early developmental test. The third phase used the SPJ mounted on the aircraft that was suspended in an installed systems test facility. This test represented a combined integration and effectiveness test that would occur late in the SPJ development.