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Acquisition and waveform setup
R&S
®
MXO 4 Series
106User Manual 1335.5337.02 ─ 05
Resolution
Defines the time between two waveform samples in the waveform record. It considers
the processing of the captured samples including interpolation. A fine resolution with
low values produces a more precise waveform record.
The resolution is the reciprocal of the sample rate.
Remote command:
ACQuire:RESolution on page 439
Acquisition mode
Sets how the waveform is built from the captured samples.
"Sample"
Usually, most signals are displayed optimally with this acquisition
mode but very short glitches can remain undiscovered by this
method.
"Peak detect"
The minimum and the maximum of n samples are recorded as wave-
form points, the other samples are discarded. Thus the instrument
can detect fast signal peaks at slow time scale settings that would be
missed with other acquisition modes.
"Envelope"
Each acquisition is done in sample mode, and the minimum and max-
imum values over some consecutive acquisitions build the envelope.
"Average"
The average is calculated from the data of the current acquisition and
a specific number of consecutive acquisitions before. The method
reduces random noise. It requires a stable, triggered and repetitive
signal.
The number of acquisitions for average calculation is defined with N-
single/Avg count.
If the waveform is clipped, the instrument shows a distorted average
waveform to indicate the clipping. Adjust the vertical scale to avoid
the clipping.
Remote command:
ACQuire:TYPE on page 440
Current Average count
Shows the current number of acquired waveforms that contribute to the average, for
Acquisition mode = "Average".
Remote command:
ACQuire:AVERage? on page 436
Interpolation
Selects the interpolation method.
If the defined sample rate ("Sample rate", "Min. sample rate") is higher than the ADC
sample rate, interpolation adds points between the captured samples of the waveform
by various mathematic methods. The selected interpolation method is also used for
zooming.
"Linear"
Two adjacent ADC sample points are connected by a straight line, the
interpolated points are located on the line. You see a polygonal wave-
form similar to the real signal, and also the ADC sample points as
vertexes.
Acquisition
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