Technical data

148 Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference
9 Acquire Commands
:ACQuire:MODE
Command :ACQuire:MODE {ETIMe | RTIMe | PDETect |
HRESolution | SEGMented | SEGPdetect | SEGHres}
The :ACQuire:MODE command sets the acquisition mode of the
oscilloscope. Sampling mode can be Real Time Normal, Real Time Peak
Detect, or Real Time High Resolution.
ETIMe In Equivalent Time mode, available on 90000A Series oscilloscopes, the
data record is acquired over multiple trigger events.
RTIMe In Real Time Normal mode, the complete data record is acquired on a
single trigger event.
PDETect In Real Time Peak Detect mode, the oscilloscope acquires all of the
waveform data points during one trigger event. The data is acquired at the
fastest sample rate of the oscilloscope regardless of the horizontal scale
setting. The sampling rate control then shows the storage rate into the
channel memory rather than the sampling rate. The storage rate
determines the number of data points per data region. From each data
region, four sample points are chosen to be displayed for each time
column. The four sample points chosen from each data region are:
• the minimum voltage value sample
• the maximum voltage value sample
• a randomly selected sample
• an equally spaced sample
The number of samples per data region is calculated using the equation:
The remainder of the samples are not used for display purposes.
HRESolution In Real Time High Resolution mode, the oscilloscope acquires all the
waveform data points during one trigger event and averages them thus
reducing noise and improving voltage resolution. The data is acquired at
the fastest sample rate of the oscilloscope regardless of the horizontal
scale setting. The sampling rate control then shows the storage rate into
the channel memory rather than the sampling rate. The number of
samples that are averaged together per data region is calculated using the
equation
Number of Samples =
Sampling Rate
Storage Rate