RIGOL MSO/DS1000Z Series - Manual (Page 72)

RIGOL Chapter 4 To Set the Sample System
4-6 MSO1000Z/DS1000Z 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. MSO1000Z/DS1000Z provides up to 24 Mpts memory depth (option) and 12
Mpts standard memory depth.
T
Trigger Point
Pre-sample Delayed Sample
Memory Depth
Figure 4-1 Memory Depth
The relation of memory depth, sample rate and horizontal time base scale fulfills the
equation below:
MDepth SRate TScale HDivs
= Ч Ч (4-1)
MDepth
: Memory depth. The unit is pts.
SRate
: Sample rate. The unit is Sa/s.
TScale
: Horizontal time base scale. The unit is s/div.
HDivs
: Number of grids horizontally. The unit is div. For MSO1000Z/DS1000Z, this
value is 12.
Therefore, under the same horizontal time base scale, 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.
 For analog channels:
― When a single channel is enabled, the memory depths available include
Auto, 12kPoints, 120kPoints, 1.2MPoints, 12MPoints and 24MPoints
(option).
―
When dual channels are enabled, the memory depths available include Auto,
6kPoints, 60kPoints, 600kPoints, 6MPoints and 12MPoints (option).
―
When three or four channels are enabled, the memory depths available
include Auto, 3kPoints, 30kPoints, 300kPoints, 3MPoints and 6MPoints
(option).