CDMA2000 Base Station Measurements (Option K82) R&S FSL
1300.2519.12 2.126 E-11
Measuring the Peak Code Domain Error and the RHO Factor
The Code Domain Error Power describes the quality of the measured signal compared to an ideal
reference signal generated by the R&S FSL. In the I-Q plane, the error vector represents the difference
of the measured signal and the ideal signal. The Code Domain Error is the difference in power on
symbol level of the measured and the reference signal projected to the class of of the base spreading
factor. The unit of the result is dB.
In the Peak Code Domain Error (PCDE) measurement, the maximum error value over all channels is
determined and displayed for a given PCG. The measurement covers the entire signal during the entire
observation time. On screen the results are shown in a diagram, in which the x-axis represents the
PCGs and the y-axis shows the PCDE values.
A measurement of the RHO factor is shown in the second part of the example. RHO is the normalized,
correlated power between the measured and the ideal reference signal. The maximum value of RHO is
1. In that case the measured signal and the reference signal are identical. When measuring RHO, it is
required that only the pilot channel is active.
Test setup:
Connect the RF output of the signal generator to the RF input of the R&S FSL (coaxial cable with N
connectors).
Connect the reference input (EXT REF IN/OUT) on the rear panel of the R&S FSL to the reference
output (REF) on the signal generator (coaxial cable with BNC connectors).
Connect external triggering of the R&S FSL (EXT TRIG GATE) to the signal generator trigger
(TRIGOUT1 at PAR DATA).
Signal generator settings:
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 activate the CDMA2000 BTS Analyzer option.
3. Enter the Code Domain Analyzer.
Press the MEAS key.
Press the Code Domain Analyzer softkey.
4. Start the Peak Code Domain Error measurement.
Press the Select Meas softkey
Press the More softkey
Select the Peak Code Domain Error softkey and start the measurement.
5. Enter the Settings Overview dialog box.
Press the Settings softkey.
Press the Settings Overview softkey.
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