Fluke 5820a Oscilloscope Calibrator @ http://amzn.to/Ux9VOn
The powerful 5820A Oscilloscope Calibrator is a complete, yet flexible solution for oscilloscope calibration. It calibrates virtually all digital and analog oscilloscopes. The 5820A is compact, portable and rugged. It provides you with all the functions required to fully verify the performance of any oscilloscope with a bandwidth of 2.1 GHz, checking amplitude, time, fast-edge (dynamic response) and leveled sine wave (bandwidth verificastion).