User Manual

RIGOL Chapter 4 To Set the Sample System
4-6 DS1000Z-E User 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. DS1000Z-E provides up to 24 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  
(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 DS1000Z-E, 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.
― When a single channel is enabled, the memory depths available include
Auto, 12kPoints, 120kPoints, 1.2MPoints, 12MPoints and 24MPoints.
― When dual channels are enabled, the memory depths available include Auto,
6kPoints, 60kPoints, 600kPoints, 6MPoints and 12MPoints.
Note: In "Auto" mode, the oscilloscope selects the memory depth automatically
according to the current sample rate.