RIGOL MSO/DS2000A Series - Manual (Page 84)

RIGOL Chapter 4 To Set the Sample System
4-8 MSO2000A/DS2000A User’s Guide
Memory Depth
Memory depth refers to the number of waveform points that the oscilloscope can
store in a single trigger sample and it reflects the storage ability of the sample
memory. MSO2000A/DS2000A provides 14 Mpts standard memory depth and up to
56 Mpts memory depth (option).
T
Trigger Point
Pre-sample Delayed Sample
Memory Depth
Figure 4-3 Memory Depth
The relation of memory depth, sample rate and waveform length fulfills the equation
below:
Memory depth = Sample Rate (Sa/s) × Horizontal Time Base × Number of Grids
Horizontally
Wherein, for MSO2000A/DS2000A, the number of grids horizontally is fixed at 14.
Therefore, under the same time base, higher memory depth can ensure higher
sample rate.
Press Acquire  Mem Depth, use
to switch to the desired memory depth (the
default is auto) and then press down the knob to select the option. You can also
press Mem Depth continuously to switch the memory depth.
 When a single channel is enabled, the memory depths available include Auto,
14kPoints, 140kPoints, 1.4MPoints, 14MPoints and 56MPoints (option).
 When CH1 and CH2 are enabled, the memory depths available include Auto,
7kPoints, 70kPoints, 700kPoints, 7MPoints and 28MPoints (option).