R&S FSH
Digital Modulation Analyzer
Measurements on TD-SCDMA Signals
Operating Manual 1173.6275.12 - 30
304
9.7.6 Configuring the Measurement
Some of the results depend on the measurement configuration.
9.7.6.1 Using the Channel Search
The R&S FSH-K48E supports the analysis of the code domain power of all channels.
Thus, it needs to detect active and inactive channels in the code domain automatically.
For a quick and basic analysis of the signal, you can turn off the channel search. The
R&S FSH in that case evaluates several basic parameters in the Result Summary.
If you turn the channel search on, the I/Q data is also analyzed in the code domain.
Thus, the measurement consumes slightly more time, but yields more results.
► Press the MEAS key.
► Press the "Display Settings" softkey.
► Select the "Channel Search On - Normal" menu item.
The R&S FSH turns the channel search on.
Note that the R&S FSH automatically turns on the channel search when you are using
the Code Domain Power result display or the Code Domain Channel Table.
Measurements without channel search
Measurements without channel search are only possible for result displays that do not
analyze the code domain.
In the Result Summary only results that do not require analysis in the code domain are
displayed.
9.7.6.2 Specifying the Scrambling Code
To demodulate a 3GPP signal, you have to know the scrambling code of the base
station you are testing.
You can enter the scrambling code manually or let the R&S FSH automatically find the
right scrambling code(s).
Defining the scrambling code manually
► Press the MEAS key.
► Press the "Signal Settings" softkey.
► Select the "Set Code Manually…" menu item.
► Enter the scrambling code of the base station you are testing.
