China Electronics Technology Instruments AV3672 Series, Руководство пользователя

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4 Measurement Setting
4.5 Setting of Sweep
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while the power level of the reference path of the analyzer remains unchanged. Thus, higher accuracy and
characteristic indicates and more accurate matching of source output signals can be realized.
The fully accurate error correction can be done at the power point for measurement calibration. If the power level is
changed in the same attenuator settings as those of measurement calibration, the accuracy of error correction is
higher in ratio measurement but poorer in non-ratio measurement.
4.5 Setting of Sweep
Sweep refers to the process of continuously measuring data points according to the stimulus values in the specified
sequence.
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Overview of sweep types
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Setting of sweep type
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Sweep time
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Sweep setting
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4.5.1 Overview of Sweep Types
The network analyzer supports six sweep types shown below.
1) Linear frequency
This is the default sweep type of the instrument. The whole frequency range is covered continuously by the
frequency linearity.
2) Logarithmic frequency
In the logarithmic frequency mode, the source frequency increases in logarithmic steps, and the frequency ratio of
every two adjacent frequency points is identical.
3) Power sweep
The power is swept at the point frequency. The maximum sweep range is 50dB. The default frequency sweep range
is -25dBm to +20dBm.
4) Point frequency
In the point frequency sweep mode, a single sweep frequency is set in the analyzer, measurement data are
accurately and continuously samples at the intervals determined according to the sweep time and the number of
measurement points, and changes of measurement data with time are displayed.
5) Segment sweep
Segment sweep aims to start sweep of several segments. The power level, intermediate frequency bandwidth and
sweep time of each segment can be set independently. After calibration of all segments, one or several segment(s)
can be measured according to the calibrations. Segments are defined according to the frequency increase sequence,
and the frequency range must be prevented from overlapping. The attenuator settings of the power levels of all
segments must be identical to prevent damage caused by frequent switching of the attenuator. If the attenuator
settings of the current segment and defined segment are different, the analyzer will automatically change the power
level and attenuator settings of the defined segment.
6) Phase sweep
Sweep the phase of one or several source(s) relative to another source. The measured value is -360° to +360°.
4.5.2 Setting of Sweep Type
1) Setting of sweep type
Menu path: [Stimulus] > [Sweep] > [Sweep Type] .
Select the corresponding sweep type in the auxiliary menu bar or in the [Setting of sweep type] dialog box.