we just got a new (Agilent branded) MSOX3034A oscilloscope. No op
tions installed. It is supposed to store 2MPts in half channel mode. In my configuration with just Ch1 on, "Acqu normal" I am only getting 1MPts recordings. Mem. Depth is halfed to 500kPts with Ch1+Ch2 active. I already upgraded to the latest (Keysight branded) firmware to no avail.
You will need to perform a Single Acquisition in order to be able to use the maximum memory. Press the Single button on the top right hand corner on the oscilloscope front panel to perform a Single Acquisition of the waveform.
Take note that the amount of waveform data that you can save also depends on horizontal setting that is being used.