China Electronics Technology Instruments AV3672 Series, User Manual

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6 Measurement Optimization
6.9 Increase of Sweep Velocity
201
➢
Rotate the connection nuts.
➢
Perform final connection with the torque wrench.
6.9 Increase of Sweep Velocity
The measurement efficiency can be improved by increasing the sweep velocity. The highest sweep velocity can be
achieved by optimizing the following settings in measurement.
1) Sweep setting
Carefully set the following items to achieve the highest sweep velocity.
➢
Frequency span : only measure the frequency range of the DUT. See the setting method in “ 4.3 Setting
of Frequency Range
”.
➢
Segment sweep : measure the relevant frequency range by means of segment sweep. See the setting
method in the instructions of “
Setting of sweep type
” in “
4.5.2 Setting of sweep type
” of “
4.5 Setting of
Sweep
”.
➢
Shutdown of step sweep : the step sweep mode must not be used unless permitted in measurement, so as
to minimize the sweep time. See the setting method in “ 4.5.3 Setting of sweep
” of “
4.5 Setting of Sweep
”.
➢
Automatic sweep time : use the default setting time in the current setting to achieve the most rapid sweep.
See the setting method in “
4.5.3 Sweep time
” of “
4.5 Setting of Sweep
”.
➢
Number of sweep points : use the minimum number required in measurement. See the setting method in
“
6.7 Increase of Data Point Number
”.
2) Setting of noise reduction
Reasonably set the following two items to reduce the sweep time but obtain the acceptable measurement results.
➢
Intermediate frequency bandwidth : use the largest intermediate frequency bandwidth to ensure the
acceptable trace noise and dynamic range. See the setting method in “ 6.6.3 Intermediate frequency
bandwidth
” of “
6.6 Reduction of Trace noise
”.
➢
Average : minimize the average factor or shut down the averaging function. See the setting method in
“
6.6.1 Sweep averagin
g” of “
6.6 Reduction of Trace noise
”.
3) Selection of calibration type
Apply the most rapid calibration meeting the measurement requirements. The time of sweep measurement is almost
the same without error correction or with response calibration. The measurement parameters of fully 2-port
calibration should be updated with error correction by forward and reverse sweep, even if only one S-parameter is
displayed, so the measurement time is the longest. For calibration type details, see “
6.2 Selection of Calibration
Type
”.
4) Shutdown of unnecessary functions
The information of all active functions must be updated. In order to increase the sweep velocity, the following
unnecessary functions for measurement should be shut down.
➢
Unnecessary trace
➢
Unnecessary marker
➢
Smoothing
➢
Limit test
➢
Trace operation
➢
Display
The sweep velocity of the analyzer depends on measurement settings. Therefore, you should try many times to
achieve the highest sweep velocity and conforming measurement results.