The purpose of this document is to show that DDj or DCD+ISI measurements from a LeCroy SDA, a WAVECREST™ SIA3000, and a Sampling Oscilloscope are consistent within the pecifications of these instruments.The methods by which these three very different instruments perform this measurement is also discussed. T E C H N I C A L B R I E F COMPARISON OF DCD+ISI MEASUREMENTS FOR SDA, WAVECREST SIA3000 AND A SAMPLING OSCILLOSCOPE Dr. James Mueller and Dr. Martin Miller ……