Rohde & Schwarz 1336.5401.02, User Manual, Page: 74 / 123

Operating the R&S QAR
R&S
®
QAR
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Table 5-4: Keyboard shortcuts
Ctrl-S Saves the currently displayed measurement results.
See "Managing measurement results" on page 78
for details.
Ctrl-O Opens a dialog box to load measurement results.
See "Managing measurement results" on page 78
for details.
5.4.3 Measurement
The radar positioning measurement verifies the correct positioning of a radar module,
for example behind the bumper of a car.
To measure the position of the radar module, the R&S QAR generates a three-dimen-
sional point cloud of the car that is in front of it. This image shows the bumper and the
location of the radar sensor mounted behind the bumper. To determine the correct
location of the radar sensor, the R&S
QAR compares the recorded image to the CAD
data of the radar sensor and the bumper or radome.
After the position and orientations of both radar and sensor and have been found in the
image, the R&S
QAR uses the CAD model of the radar sensors emission cone to cal-
culate the intersection area of the emission cone and the radome.
Finally, the R&S QAR calculates the shortest distance between the intersection area of
the radar emission cone and the boundaries of the allowed area.
Measuring the DUT
1. Select the configuration from the "Car Type" drop-down list.
2. Select "Options" > "Alarm Limits" to define acceptance limits.
For more information, see "Managing measurement results" on page 78.
3. Select "Measure".
The R&S QAR measures the DUT, which takes a few seconds. Do not move the
radar during the measurement.
After a few seconds, the results appear in the user interface.
Graphic results
The image shows the CAD data and, as an overlay, the measurement results.
The colors have the following meaning:
●
The green contour corresponds to the border polygon.
●
The orange contour corresponds to the theoretical radar beam intersection.
●
The red contour corresponds to the measured radar beam intersection.
●
The yellow lines correspond to the measured distances.
You can display the graphical results as a 2D screenshot or as 3D image.
► Select "Options" > "Save Settings" > "Save Screenhot".
Radar Positioning Measurements