R&S FSL CDMA2000 Base Station Measurements (Option K82)
1300.2519.12 2.121 E-11
Fig. 2-84: Measurement of the code domain power without external reference
Synchronization of the reference frequencies
The frequency error can be reduced by synchronizing the transmitter and the receiver to the same
reference frequency.
7. Press the SETUP key.
Press the Reference Int/Ext softkey to switch to an external reference.
Screen A again shows the CDP measurement and screen B the result summary. After the
synchronization of the reference frequencies of the devices, the frequency error should now be smaller
than 10 Hz.
Behavior with deviating center frequency setting
A measurement can only be valid if the center frequency of the DUT and the analyzer are balanced.
8. On the signal generator, change the center frequency in steps of 0.1 kHz and observe the analyzer
screen.
Up to a frequency error of approximately 1.0 kHz, a Code Domain Power measurement on the
R&S FSL is still possible. A frequency error within this range causes no apparent difference in the
accuracy of the Code Domain Power measurement.
Above a frequency error of 1.0 kHz, the probability of incorrect synchronization increases. This is
indicated by the SYNC FAILED error message.
If the frequency error exceeds approximately 1.5 kHz, a Code Domain Power measurement cannot
be performed. This is indicated by the SYNC FAILED error message.
Reset the center frequency of the signal generator to 878.49 MHz.
Note: The center frequency of the DUT should not deviate by more than 1.0 kHz from that of the
R&S FSL.
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