Rohde & Schwarz R&S FSL3 - Measuring the Triggered Relative Code Domain Power

CDMA2000 Base Station Measurements (Option K82) R&S FSL
1300.2519.12 2.122 E-11
Measuring the triggered Relative Code Domain Power
If the code domain power measurement is performed without external triggering, a section of the test
signal is recorded at an arbitrary point of time and the firmware attempts to detect the start of a power
control group (PCG). To detect this start, all possibilities of the PN sequence location have to be tested
in Free Run trigger mode. This requires computing time. This computing time can be reduced by using
an external (frame) trigger and entering the correct PN offset. If the search range for the start of the
power control group and the PN offset are known then fewer possibilities have to be tested. This
increases the measurement speed.
Test setup:
 Connect the RF output of the signal generator to the input of the R&S FSL.
 Connect the reference input (EXT REF) on the rear panel of the R&S FSL to the reference input of
the signal generator (coaxial cable with BNC connectors).
 Connect the external trigger input on the rear panel of the R&S FSL (EXT TRIGGER/GATE IN) to
the external trigger output of the signal generator.
Signal generator settings (e.g. R&S SMU):
Frequency: 878.49 MHz
Level: 0 dBm
Standard: CDMA2000
Procedure:
1. Set the R&S FSL to its default state.
 Press the PRESET key.
2. Activate the CDMA2000 BTS Analyzer Mode.
 Press the MODE key and select CDMA2000 BTS Analyzer.
3. Enter the Code Domain Analyzer.
 Press the MEAS key
 Press the Code Domain Analyzer softkey.
4. Start the measurement.
 In the Code Domain Analyzer softkey menu, press the Select Meas softkey.
 Press the Code Domain Power softkey.
5. Enter the Settings Overview dialog box.
 Press the Settings softkey.
 Press the Settings Overview softkey.
The Settings Overview dialog box is displayed.
6. Set the center frequency and the reference level.
 In the Settings Overview dialog box select the Frontend button.
 In the Center Frequency field enter 878.49 MHz.
 In the Ref Level field enter 10 dBm.
 Close the Frontend Settings dialog box.