Rohde & Schwarz 1336.5401.02, User Manual, Page: 66 / 123

Operating the R&S QAR
R&S
®
QAR
66 User Manual 1178.7200.02 ─ 09
5.3.3.1 Normalization
Normalization is a measurement done in the free space, to obtain a reference value for
the bumper measurements. You do not need any object to measure or additional ele-
ment.
Normalization enables you also to check the positioning and the status of the reference
reflector. If the position is wrong, or the reflector is damaged, you get a warning.
Perform the following steps:
1. Make sure that nothing is obstructing the view between R&S QAR and the refer-
ence reflector.
2. Choose the configuration needed from the "bumper type" drop-down menu.
3. Click the "Normalize" button to start the measurement.
The R&S QAR measures the deviations and saves the correction data. All subse-
quent measurements are corrected accordingly.
4. Optional: scan the free space by clicking the "Measure" button to verify the normali-
zation.
The expected result is an attenuation around 0 dB. For a range of acceptable
results, see the datasheet.
If the results do not meet the expectations, repeat the normalization.
If the second normalization still yields unexpected results, perform the verification,
as described in
Chapter 5.3.5, "Verification" , on page 68.
5.3.3.2 Attenuation Measurement
1. Set a threshold, if needed, by choosing "Options" > "Threshold".
2. Click the "measure" button. Or press F5.
Do not move the bumper during the measurement.
The measurement takes a few seconds, then the results appear on the GUI. See
"Numeric results and indicator" on page 64 and "Result display" on page 64.
If you change the position of the reference reflector, or set a different configuration to
use in the "bumper type" drop-down list, perform a new normalization before measur-
ing.
5.3.4 Configuration
The R&S QAR provides several tools to configure the radome measurements.
Bumper Measurements