CDMA2000 Base Station Measurements (Option K82) R&S FSL
1300.2519.12 2.128 E-11
Standard test setup:
BTS
RF INPUT
EXTERNAL
ATTENUATION
EVEN SECOND
CLOCK TRIGGER
EXT TRIGGER
EXT REF
EXTERNAL
REFERENCE
SIGNAL
TX SIGNAL
R&S FSL
Connect the antenna output (or TX output) of the base station to the RF input of the R&S FSL. Use
power attenuator exhibiting suitable attenuation.
The following values for external attenuation are recommended to ensure that the RF input of the
analyzer is protected and the sensitivity of the unit is not reduced too much:
Maximum Power Recommended external attenuation
55 to 60 dBm
35 to 40 dB
50 to 55 dBm
30 to 35 dB
45 to 50 dBm
25 to 30 dB
40 to 45 dBm
20 to 25 dB
35 to 40 dBm
15 to 20 dB
30 to 35 dBm
10 to 15 dB
25 to 30 dBm
5 to 10 dB
20 to 25 dBm
0 to 5 dB
20 dBm 0 dB
For signal measurements at the output of two-port networks, connect the reference frequency of the
signal source to the rear reference input of the analyzer.
The R&S FSL must be operated with an external frequency reference to ensure that the error limits
of the CDMA2000 specification for frequency measurements on base stations are met. A rubidium
frequency standard can be used as a reference source for example.
If the base station has a trigger output, connect the trigger output of the base station to the rear
trigger input of the analyzer (EXT TRIG GATE).
Presettings
Enter the external attenuation
Enter the reference level
Enter the center frequency
Set the trigger
If used, enable the external reference
Select the standard and the desired measurement
Set the PN offset
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