User`s guide

RIGOL Chapter 4 To Set the Sample System
DS1000Z User’s Guide
4-6
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 provides up to 24 Mpts memory depth (option) and 12 Mpts
standard memory depth.
T
Trigger Point
Pre-sample
Delayed Sample
Memory Depth
Figure 4-2 Memory Depth Schematic Diagram
The relation of the memory depth, sample rate and horizontal time base scale fulfills
the equation below. Therefore, under the same horizontal time base scale, higher
memory depth can ensure higher sample rate.
MDepth SRate TScale HDivs
=××
Wherein,
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
——the number of grids in the horizontal direction of the screen, the unit is
div. For DS1000Z, this value is 12.
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, 1200kPoints, 12MPoints and 24MPoints (optional). In “Auto”
mode, the oscilloscope selects the memory depth automatically according to the