MDO3000 Programmer Manual.pdf - 第144页

Commands Listed in A lphabetical Order ACQuire:MODe Specifies the acquisition mode of the oscilloscope for all analog channel waveforms. The acquisition mode determines how the final value of the acquisition interval is ge…

100%1 / 1158
Commands Listed in Alphabetical Order
Arguments
1 or ON turns on f
ast acquisition mode.
0 or OFF turns it off.
Examples
ACQ:FASTA:STATE ON turns on fast acquisition mode.
ACQuire:MAGnivu
Turns on the MagniVu feature, which provides up to 32 times signal detail forfast
viewing of short events. This feature is not recommended for slow data formats
such as RS-232.
NOTE. MagniVu channel sampling is available on MSO/MDO4000/B
oscilloscopes only as well as MDO3000 and MDO4000C models with option
MDO3MSO or MDO4MSO installed.
Group
Acquisition
Syntax
ACQuire:MAGnivu {<NR1>|OFF|ON}
ACQuire:MAGnivu?
Arguments
<NR1> = 0 disables the MagniVu feature; any other value turns this feature on.
ON enables the MagniVu feature.
OFF disables the MagniVu feature.
ACQuire:MAXSamplerate? (Query Only)
Returns the maximum real-time sample rate, which varies from model to model.
Group
Acquisition
Syntax
ACQuire:MAXSamplerate?
Examples
ACQUIRE:MAXSAMPLERATE? might return 2.5000E+9 indicating the maximum
real-timesamplerateis2.5GS/s.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-113
Commands Listed in Alphabetical Order
ACQuire:MODe
Specifies the acquisition mode of the oscilloscope for all analog channel
waveforms. The acquisition mode determines how the final value of the
acquisition
interval is generated from the many data samples.
Waveforms are the displayed data point values taken from acquisition intervals.
Each acquis
ition interval represents a time duration set by the horizontal scale
(time per division). The oscilloscope sampling system always samples at the
maximum rate, so the acquisition interval may include more than one sample.
Group
Acquisition
Syntax
ACQuire:MODe {SAMple|P EAKdetect|HIRes|AVErage|ENVelope}
ACQuire:MODe?
Related Commands
ACQuire:NUMAVg, ACQuire:NUMEnv
CURVe
Arguments
SAMple specifies that the displayed data point value is the first sampled value
that is taken during the acquisition interval. In sample mode, all waveformdata
has 8 bits of precision. You can request 16 bit data with a CURVe query but the
lower-order 8 bits of data will be zero. SAMple is the default mode.
PEAKdetect specifies the display of high-low range of the samples taken from a
single waveform acquisition. The high-low range is displayed as a vertical column
that extends from the highest to the lowest value sampled during the acquisition
interval. PEAKdetect mode can reveal the presence of aliasing or narrow spikes.
HIRes specifies Hi Res mode where the displayed data point value is the
average of all the samples taken during the acquisition interval. This is a form
of averaging, where the average comes from a single waveform acquisition. The
number of samples taken during the acquisition interval determines the number of
data values that compose the average.
AVErage specifies averaging mode, in which the resulting waveform shows an
average of SAMple data points from several separate waveform acquisitions. The
oscilloscope processes the number of waveforms you specify into the acquired
waveform, creating a running exponential average of the input signal. The number
of waveform acquisitions that go into making up the average waveform is set or
queried using the
ACQuire:NUMAVg command.
ENVelope specifies envelope mode, where the resulting waveform shows the
PEAKdetect range of data points from every waveform acquisition.
2-114 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Examples
ACQUIRE:MODE E
NVELOPE
sets the acquisition mode to display a waveform that
is an envelope of many individual waveform acquisitions.
ACQUIRE:MODE
?
might return:ACQui re:MODe AVERAGE indicating that
the displayed waveform is the average of the specified number of waveform
acquisitions.
ACQuire:NU
MACq? (Query Only)
Returns the number of waveform acquisitions that have occurred since starting
acquisition with the ACQuire:STATE RUN command. This value is reset to zero
when any a
cquisition, horizontal, or vertical arguments that affect the waveform
are changed. The maximum number of acquisitions that can be counted is 2
32
1.
Group
Acquisition
Syntax
ACQuire:NUMACq?
Related Commands
ACQuire:STATE
Returns
ACQuire:NUMACq? might return :ACQUIRE:N UMACQ 350 indicating that 350
acquisitions have occurred since executing an ACQuire:STATE RUN command.
ACQuire:NUMAVg
Specifies the number of waveform acquisitions that should make up an averaged
waveform. Use the ACQuire:MODe command to enable the Average mode.
Sending this command is equivalent to turning a multipurpose knob to enter the
number of waveform acquisitions to average.
Group
Acquisition
Syntax
ACQuire:NUMAVg <NR1>
ACQuire:NUMAVg?
Related Commands
ACQuire:MODe, ACQuire:STATE
Arguments
<NR1> is the number of waveform acquisitions to average. The range of values is
from2to512inpowersoftwo.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-115