R&S FSH
Digital Modulation Analyzer
Measurements on 3GPP FDD Signals
Operating Manual 1309.6275.12 - 14
184
T Offs (chips)
Shows the timing offset of the code channel in chips.
Pilot Bits
Shows the number of pilot bits the code channel contains.
Status
Status display of the code channel.
Power Abs (dBm)
Absolute power of the code channel in dBm.
Power Rel to CPICH (dB)
Relative power of the code channel in dB. The reference channel is the C-PICH or the
total signal, depending on the reference power you have selected.
7.2.4 Configuring the Measurement
Some of the results depend on the measurement configuration.
7.2.4.1 Specifying the Scrambling Code
To demodulate a 3GPP signal, you have to know the primary and secondary
scrambling codes 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
M
Press the MEAS key.
M
Press the "Signal Settings" softkey.
M
Select the "Primary Code…" or "Secondary Code…" menu item.
M
Enter the primary or secondary scrambling code of the base station you are
testing.
In most cases, the secondary scrambling code has the value '0'.
Performing a search for the scrambling code
If you don't know the scrambling code, the R&S FSH is able to determine the
scrambling code of one or more 3GPP base stations by itself.
M
Press the MEAS key.
M
Press the "Signal Settings" softkey.
M
Select the "[ ] Auto" menu item.
