the 150MHz model to the 100MHz model, I expect are purely down to the factory test of the sample signal they test. as the sampling circuit has a switch to limit to 20MHz, all models have that option.... the 1052 models get auto limited to the 50MHz filter , and the 1102 and I expect the 1152 models get the 2ns time base.
anyone way to try turning a DS1052E into a 2ns time base 1052 ? ie with the 50MHz limit BW still set, and then go to the 1102, with the 50MHz limit tuerned off, but dont enable the 2ns option of the time base ?
would confirm things better...