R&S FSL CDMA2000 BTS Analyzer (Option K82)
1300.2519.12 4.325 E-11
For the Code Domain Power measurement, the following parameters are determined for the
c
hannels:
– Channel Type
Shows type of channel ('---' for inactive channels)
– Walsh Chan.SF
Channel number including the spreading factor (in the form <Channel>.<SF>).
– Symb Rate/ksps
Symbol rate with which the channel is transmitted (9.6 ksps to 307.2 ksps).
– RC
Radio configuration.
– State
Status display. Unassigned codes are identified as inactive channels.
– Pwr dBm/Pwr dB
Specification of the absolute (dBm) and relative (dB) (referred to the F-PICH or the total power
of signal) power of the channel
– T Offs/ns and Ph Offs/mrad
Timing/phase offset between this channel and the pilot channel (enabled via the Demod
Settings softkey, Time/Phase Estimation).
If enabled, the maximum value of the timing/phase offset is displayed together with the
associated channel in the last two lines. Since the timing/phase offset values of each active
channel can be either negative or positive, the absolute values are compared and the maximum
is displayed with the original sign.
Remote: CALC1:FEED "XTIM:CDP:ERR:CTAB"
Power vs PCG
Selects the Power versus Power Control Group (PCG) result display.
In this result display, the power of the selected channel is averaged for each measured PCG and
referred to the pilot power of the PCG. Therefore the unit of the y–axis is dB (relative to the Pilot
Channel). For measurements in which Antenna Diversity is inactive (OFF) or set to 'Antenna 1',
the F-PICH channel is used as reference, while the F-TDPICH channel is used for measurements in
which Antenna Diversity is set to 'Antenna 2'.
Note: For signals with enabled power control, use the default reference power setting. For details
refer to Power Reference.
The result display consists of the number of the PCGs in the measurement and their respective
power value. You can set the number of PCGs by means of the Capture Length. Subsequently,
the Power vs. PCG result display takes one code channel into account over the entire period of
observation. The selected PCG (Power Control Group) is marked in red.
Note: For a power–regulated signal, to correctly detect the start of a power control group, the external
trigger must be used.
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