 For the analog channel:
― When a single channel is enabled, the range of <mdep> is {AUTO|12000|
120000|1200000|12000000|24000000}.
― When dual channels are enabled, the range of <mdep> is {AUTO|6000|60000|
600000|6000000|12000000}.
― When three/four channels are enabled, the range of <mdep> is {AUTO|3000|
30000|300000|3000000|6000000}.
For the digital channel:
― When 8 channels are enabled, the range of <mdep> is {AUTO|12000|120000|
1200000|12000000|24000000}.
― When 16 channels are enabled, the range of <mdep> is {AUTO|6000|60000|
600000|6000000|12000000}.
 The following equation describes the relationship among memory depth, sample
rate, and waveform length:
Memory Depth = Sample Rate x Waveform Length
Wherein, the Waveform Length is the product of the horizontal timebase (set by
the :TIMebase[:MAIN]:SCALe command) times the number of grids in the horizontal
direction on the screen (12 for MSO1000Z/DS1000Z).
When AUTO is selected, the oscilloscope will select the memory depth automatically
according to the current sample rate.