Instructions

Chapter 2 Command System RIGOL
DS1000Z-E Programming Guide 2-5
:ACQuire:MDEPth
Syntax :ACQuire:MDEPth <mdep>
:ACQuire:MDEPth?
Description Set or query the memory depth of the oscilloscope (namely the number of waveform
points that can be stored in a single trigger sample). The default unit is pts (points).
Parameter
Name
Type
Range
Default
<mdep>
Discrete Refer to Explanation
AUTO
Explanation
 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}.
 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 DS1000Z-E).
When AUTO is selected, the oscilloscope will select the memory depth automatically
according to the current sample rate.
Return
Format
The query returns the actual number of points (integer) or AUTO.
Example :ACQuire:MDEPth 12000 /*Set the memory depth to 12000pts*/
:ACQuire:MDEPth? /*The query returns 12000*/
Related
Command
:ACQuire:SRATe?
:ACQuire:TYPE
Syntax :ACQuire:TYPE <type>
:ACQuire:TYPE?
Description
Set or query the acquisition mode of the oscilloscope.
Parameter
Name
Type
Range
Default
<type>
Discrete
{NORMal|AVERages|PEAK|HRESolution}
NORMal
Explanation
 NORMal
: in this mode, the oscilloscope samples the signal at equal time interval to
rebuild the waveform. For most of the waveforms, the best display effect can be
obtained using this mode.
 AVERages: in
this mode, the oscilloscope averages the waveforms from multiple
samples to reduce the random noise of the input signal and improve the vertical
resolution. The number of averages can be set by the
:ACQuire:AVERages command.
Greater number of averages can lower the noise and increase the vertical resolution,
but will also slow the response of the displayed waveform to the waveform changes.
 PEAK (Peak Detect): in this mode, the oscilloscope acquires the maximum and
minimum values of the signal within the sample interval to get the envelope of the
signal or the narrow pulse of the signal that might be lost. In this mode, signal
confusion can be prevented but the noise displayed would be larger.
 HRESolution (High Resolution): this mode uses a kind of ultra-sample technique to