Troubleshooting Power Delivery Networks can be challenging, especially when you are trying to maintain Power Integrity. Using a Low Noise oscilloscope, such as the 6 Series B MSO coupled with the correct probing plus automated software to ensure accurate repeatable test data is essential.
In addition, check out this excellent on-demand webinar featuring Steven Sandler & Enrico Citti talking about how to solve Power Integrity Test Challenges.